Saturday, January 14, 2012

Audi A5 Cabriolet, 2012


Audi A5 Cabriolet, 2012

The Audi is refreshing the A5 model series. Advanced technologies are being added to the Sportback, Coupé, Cabriolet and S5 models in the areas of the engine, quattro drive and infotainment for even more efficiency, sportiness and intelligence. The updated design visually underscores the technical expertise involved in these versions.

The Audi A5 models are now more distinctive than ever. The rear lights and the headlights have been redesigned and are optionally available in xenon plus technology with homogenous LED daytime running lights. New colors and materials accentuate the interior, and many details of the operating concept have been fine-tuned.

Each of the four TDI diesel and three TFSI gasoline units in the new engine lineup include forced induction and direct fuel injection. The new 1.8 TFSI features a number of groundbreaking innovations. Fuel consumption has been reduced by 11 percent on average. The start-stop system and the recuperation system come standard with all engine-transmission configurations.

Each engine is matched with the ideal drivetrain - six-speed manual, multitronic, seven-speed S tronic, front-wheel drive or quattro drive. When combined with S tronic, the quattro drivetrain uses the crown-gear center differential and torque vectoring; the sport differential is the perfect complement. The chassis has been more finely tuned, with the optional Audi drive select system and dynamic steering making the Audi A5 even more fun to drive. The electromechanical power steering is new to the Audi A5 family.

The new A5 is a highly intelligent car. Its driver assistance systems have undergone intensive further development. The range of infotainment options now includes the Bluetooth online car phone, which delivers a number of special services and connects the Audi A5 to the Internet.

The exterior design and body
Ever since their debut, the models of the Audi A5 family - the Sportback, Coupé and Cabriolet - have impressed with their elegance. The flowing silhouettes, the sharp lines and the muscular surfaces make strong statements. The product improvement adds sharp new accents to the design.

The upper corners of the single-frame grille in high-gloss black are beveled. The grille's lateral bars and the Audi rings appear to be sculpted. The new bumper features pronounced air inlets with massive struts, revamped grilles and flat fog lights. Sharply chiseled edges give the engine hood a three-dimensional look; the entire front end appears even flatter and wider.

The headlights have also been updated. Their lower edge forms a wave; their interior has been restructured. With the optional xenon plus headlights, the LED daytime running lights form a narrow, homogenous clasp framing the headlight. Audi also offers the adaptive light system with dynamic cornering light and turning light. The rear lights have also been redesigned and are optionally available with continuous LED light strips. The bumper includes a number of additional details.

The product improvement has added a millimeter (0.04 in) to each of the exterior dimensions. The Audi A5 Sportback is 4.71 meters (15.45 ft) long; the Coupé and the Cabriolet 4.63 meters (15.19 ft). The range of colors has been reshuffled and now comprises 16 colors. The fully automatic acoustic top of the Audi A5 Cabriolet is available in four colors. The S line exterior package is available for those who appreciate an even more dynamic look.

The vehicle bodies impress with high rigidity, outstanding crash safety, high vibrational comfort and low weight. The front fenders are made of aluminum for improved axial load distribution. Aerodynamic fine-tuning measures include a lined underbody.

The interior
A harmonious balance of proportions and surfaces, fine materials and top-quality fit and finish: The interior of the Audi A5 models reflects the Audi brand culture. It is now more elegant than ever - with new steering wheels, including an option for a flattened ring, new steering column stalks and with narrow chrome clasps framing the control elements.

New paint covers the bezels on the instrument cluster and the center console, and there is also a new selection of upholstery and inlays. The latter are available in Aluminium Trigon or in walnut or natural fine grain ash. Almost all of the interior colors are new. Fine Nappa leather replaces Valcona in the Sportback, and the armrests can also be covered in leather, if desired. The Audi A5 Sportback is also now optionally available as a five-seater.

The Engines
The Audi A5 family sets new standards for sportiness and efficiency. All engines feature forced induction and direct injection for tremendous pulling power. Even the entry-level engine produces 320 Nm (236.02 lb-ft) of torque. The start-stop system and the recuperation system are standard with all engines - no other manufacturer takes such a rigorous approach. The lineup comprises three gasoline engines and four TDI units. CO2 emissions have been reduced by as much as 22 percent.

The completely redesigned 1.8 TFSI showcases the full extent of Audi's expertise. Groundbreaking innovations can be found in the control of the valves and their lift, the thermal management concept, the injection system, the turbocharger and the integration of the exhaust manifold. In the Audi A5 Coupé, the high-end four-cylinder unit consumes on average just 5.7 liters of fuel per 100 km (41.27 US mpg). This best-in-class value corresponds to 134 grams CO2 per km (215.65 g/mile) and is 21 percent lower than before. With 125 kW (170 hp), the 1.8 TFSI accelerates the A5 powerfully.

The output of the 2.0 TFSI remains unchanged at 155 kW (211 hp). New to the Audi A5 lineup is the 3.0 TFSI, a supercharged V6 producing 200 kW (272 hp).

The diesel engines are also impressively efficient, and the four-cylinder units feature modifications in numerous areas. Equipped with the 130 kW (177 hp) 2.0 TDI and a manual transmission, the Audi A5 Coupé consumes on average just 4.7 liters of fuel per 100 km (50.05 US mpg) - a CO2 equivalent of 122 g per km (196.34 g/mile) and a milestone in the coupe segment.

Three V6 diesel units round out the lineup on the top end. The 3.0 TDI with 150 kW (204 hp) is the most fuel-efficient six-cylinder unit in its class worldwide. In the Audi A5 Coupé with multitronic, it consumes on average 4.9 liters (48 US mpg) of fuel and emits just 129 grams CO2 per km (207.61 g/mile). The second variant of the 3.0 TDI produces 180 kW (245 hp). Arriving somewhat later is a particularly low-emissions clean diesel model that will make the Audi A5 the first coupe on the market to meet the Euro 6 diesel standard.

Audi offers the ideal drivetrain for each engine. A manual six-speed transmission and the continuously variable multitronic are available for models with front-wheel drive. The quattro models come with a manual transmission or the lightning-fast, seven-speed S tronic. All of the transmissions shine with their convenience and precision, high efficiency and wide gear spread. The long ratios in the upper gears reduce fuel consumption.

The Chassis
The Audi A5 models set standards for sporty dynamics, luxurious ride comfort and excellent driving safety. Most of the components of the five-link front suspension and the trapezoidal-link rear suspension are made of aluminum. The rear suspension bearings and the damper tuning have been updated for more precise handling and even greater comfort.

The ESP stabilization program with electronic limited slip differential is standard in all front-wheel drive versions of the Audi A5. ESP uses minimal braking interventions at the inside front wheel for even more agility during dynamic driving. The large brakes - with ventilated front and rear discs in many variants - offer excellent stopping power and are very easy to modulate.

17-inch wheels with 225/50 tires are standard. Options include wheels up to 20 inches and 265/30 tires as well as four new wheel designs.

Among the high-end features in the model series is Audi drive select. In the basic configuration, it adjusts the power steering boost, the accelerator characteristic, the shift points of the automatic transmission and the automatic air conditioning. Using a button in the cockpit, the driver can determine whether these components should work in "comfort," "auto," "dynamic" or "efficiency" mode. The latter helps to drive the Audi A5 particularly efficiently. If the car is equipped with a navigation system, there is also an "individual" mode that the driver can largely configure him or herself.

The Audi drive select can be combined with additional modules, if desired. These are the sport suspension with damper control, the sport differential and dynamic steering, which steplessly varies the steering ratio by nearly 100 percent as a function of speed.

Other new standard feature in the Audi A5 model series is the electromechanical power steering. An electric motor generates the right amount of boost for the speed being driven. The electromechanical power steering features a direct ratio, reacts instantly and provides precise road feedback. It intervenes slightly to support the driver when braking on a surface with less grip on one side of the car.

The system reduces fuel consumption by up to 0.3 liters per 100 km and up to 7 g CO2/km (11.27 g/mile) because it consumes no energy at all while driving straight.

Assistance systems
The assistance systems in the Audi A5 model series use a variety of technologies to make driving even more controlled. Some of them have been improved with new functions. Among the standard features is the new driver information system with recommendations to take a break. It uses steering motions and additional parameters to detect when the driver is getting tired and issues an appropriate warning.

Audi side assist supports the driver when changing lanes by using radar to monitor the space behind the car. Audi active lane assist - a new feature in the Audi A5 - helps the driver to maintain the lane. A camera detects the lane markings and the system makes slight corrections to the electromechanical steering, if necessary. The adaptive cruise control uses radar technology to maintain a constant interval between the Audi A5 and the vehicle ahead. At speeds below 30 km/h (18.64 mph), it initiates maximum braking in the event of an impending collision.

Infotainment systems
The infotainment systems in the Audi A5 have been significantly upgraded. Audi equips all models in the A5 lineup with a CD radio and eight speakers.

The optional top-of-the-line unit is MMI navigation plus with a large hard drive, seven-inch color monitor, 3D graphics and DVD player. Its controls have been improved. The number of hard buttons has been reduced from eight to four and the volume control now features a joystick cap to make it easier to choose songs. Voice control and digital radio reception also received some fine-tuning.

An additional option is the Bluetooth online car phone. Audi connect is the catchword for the attractive services this phone brings to the A5, which include Google POI search, navigation with Google Earth images and a WLAN hotspot. The hotspot enables passengers to surf the Internet and send and receive e-mail with their mobile devices. Audi traffic information online is an additional service that does a much better job than the familiar TMC standard of providing the driver with extremely precise and current information about the traffic load along the selected route. All the driver needs to use these functions is a data-capable SIM card.

The Prices
Despite the extensive product improvement, Audi is raising prices only slightly. The price increase for the Audi A5 Coupé 2.0 TFSI is only €200, for example. The base model, the Audi A5 Sportback 1.8 TFSI, costs €33,350.

The Audi S5
The top models in the series - the S5 as Sportback, Coupé and Cabriolet - have also been refreshed. All S5 models, including the Coupé, are now equipped with the 3.0 TFSI producing 245 kW (333 hp). Compared to the 4.2-liter V8 it replaces in the Coupé, the supercharged V6 consumes on average 20 percent less fuel per 100 kilometers. Average fuel consumption is just 8.1 liters (29.04 US mpg) while performance remains impressive. The S5 Coupé accelerates from 0 to 100 km/h (62.14 mph) in just 4.9 seconds on its way to an electronically governed top speed of 250 km/h (155.34 mph).
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Monday, January 9, 2012

Chevrolet Camaro ZL1, 2012


Chevrolet Camaro ZL1, 2012

The 2012 Chevrolet Camaro ZL1 debuted at the 2011 Chicago Auto Show. It is the highest-performing Camaro and the most technically advanced car ever developed in its class. The new ZL1 continues the momentum of Camaro, propelling it into an entirely new realm of leading-edge performance technology. It is planned to launch at the beginning of 2012.

Motivated by a supercharged V-8 engine producing an estimated 550 horsepower (410 kW), the Chevrolet Camaro ZL1 will be the fastest Camaro ever offered by Chevrolet. And more than just power, the ZL1 features technologically advanced and highly developed chassis and suspension systems that help it deliver balanced, track-ready handling and braking power to complement its high engine output. Rigorous development of the Chevrolet Camaro ZL1 is ongoing, and official estimates of the car's capabilities will be released later in 2011, as testing nears completion.

The ZL1 name is derived from the all-aluminum racing engine of the same name, which was developed in the late 1960s and installed into a handful of regular-production 1969 Camaros. Only 69 were built with the engine, but they've achieved mythical status among enthusiasts, as they represented the pinnacle in Camaro performance - until now. The 2012 Chevrolet Camaro ZL1 model is designed to be a major leap forward for the Camaro, bringing a new level of performance capability to the segment.

The central goal of the car's development was creating something new - a Camaro intended to reach optimal lap times on top road-racing circuits and excellent driving dynamics on the street. To achieve that goal, engineers evolved many of the existing Camaro's systems, as well as incorporated new technologies such as electric power steering and Magnetic Ride Control, the world's fastest-reacting suspension system.

The Camaro ZL1's design communicates and supports its performance mission. Rather than using decorative elements, Chevrolet Camaro ZL1 is visually differentiated from other current Camaro models with elements vital to the car's elevated capabilities.

Major elements of the ZL1's design are a new front fascia and hood with air extractors, designed in tandem to create aerodynamic downforce to aid handling. The car's hood includes a signature center section constructed of carbon fiber and rendered in satin black finish. New rocker panels, wide tires, 20-inch wheels and exhaust tips portray the car's handling and power.

The Chevrolet Camaro ZL1 badge appears on the grille, hood and the brake calipers, all key areas portraying the technology within.

Tech overview
Supporting the dynamic track and street performance of the ZL1 is the LSA 6.2L supercharged engine, which will produce an estimated 550 horsepower (410kW) and 550 lb.-ft. of torque (677 Nm), with specific features for the Camaro. Built on GM's legendary all-aluminum, small-block V-8 architecture, the LSA features an intercooled supercharger system, premium heat-resistant aluminum-alloy cylinder heads and other details designed to ensure its exceptional performance is delivered with smoothness and refinement. Components and design elements that contribute to the LSA's performance:
  •    Balanced, lightweight reciprocating assembly
  •    High-strength hypereutectic pistons
  •    Sixth-generation Eaton supercharger with four-lobe rotors
  •    Piston oil squirters.
Chevrolet Camaro ZL1 is a complete high-performance car, not just a Camaro with more power. Key technical highlights:
Transmission - The high-performance Tremec TR-6060 six-speed manual is matched with the LSA engine. It is the "MG9" version of the transmission, with a higher torque capacity. It is used with a dual-mass flywheel and twin-disc clutch for easy operation and shift smoothness. A new, shorter-throw shifter actuates the gear changes.

Exhaust - Chevrolet Camaro ZL1 is equipped with a dual-mode exhaust system, which alters the sound level and character in response to engine rpm. First used on the legendary Corvette, and specifically tuned for Chevrolet Camaro ZL1, the dual-mode exhaust will give the car a signature sound.

Drivetrain - It is revised with a stronger driveshaft and rear axle system, featuring a larger and stronger cast iron differential housing, stronger axles and heavy-duty limited-slip differential. This patent-pending system is designed to ensure that ZL1's tremendous power is delivered smoothly to the ground.

Suspension - The suspension features completely revised tuning and the inclusion of segment-exclusive Magnetic Ride Control. Chevrolet Camaro ZL1's Magnetic Ride system will include driver selectable modes (Tour and Sport) tailored for the preferred style of driving. It uses advanced magneto-rheological science to produce shock damping with the highest level of precision, enabling body control optimized for excellent performance in everyday driving as well as track situations. This technology appears on only a small roster of some of the world's finest performance cars. Other chassis elements are redesigned to support the car's high-performance limits. Rear stabilizer bars have drop links repositioned outboard of the control arms. This makes the bars more effective in controlling body roll in turns, with crisp response to driver commands.

Brakes and Steering - Camaro ZL1 features an advanced track-capable braking system, developed in conjunction with experts from Brembo. The large 14.6-inch (370 mm) two-piece front rotors have six-piston calipers; the 14.4-inch (365 mm) rear rotors have four-piston calipers. Chevrolet Camaro ZL1 marks the entry of a new electric power steering system to Camaro. It is being developed to ensure precise control and feedback to the driver, with greater variability of effort for high-performance driving.

Exterior - ZL1's signature from the front is the redesigned fascia and aluminum hood with a raised, carbon fiber insert. The fascia includes a front splitter and new vertical fog lamps. The fog lamp area includes air intakes designed for brake cooling. The hood features front-mounted air extractors that direct air precisely over the car. Visually, this center section, in satin black carbon fiber, communicates the car's high-performance intent as a visual contrast to the car's exterior color. Functionally, the air extractor is a key in connecting airflow closely to the bodywork, creating aerodynamic downforce. The carbon fiber center section reduces the mass of the hood. High-intensity discharge (HID) headlamps and fog lamps are standard. The rear of the car includes a diffuser and spoiler, also functional elements that enhance the car's aerodynamics.

Wheels and Tires - New-design, 20-inch forged aluminum wheels, which are lighter than the 20-inch wheels used on the Camaro SS, are used with new Goodyear Supercar F2 ties developed specifically for the Chevrolet Camaro ZL1.

Interior - ZL1 is tailored for high-performance driving. The front seats feature microfiber suede inserts. Other enhancements include a redesigned steering wheel, alloy pedals, Head-Up Display with unique performance readouts and the "four-pack" auxiliary gauge system featuring a boost readout.

Production details
All of the Camaro exterior colors will be offered with the ZL1, but black is the only interior color. The unique exterior features are complemented with a black center section on the hood. Inside, the Chevrolet Camaro ZL1 has heated leather seats with microfiber inserts and ZL1 logos embroidered on the front headrests. Microfiber suede is repeated as an accent on the instrument panel, adding a richer look to the interior. The Chevrolet Camaro ZL1 will include the same content as the current 2SS package and include the following new or unique features:
    * Six-way power driver and passenger seats
    * Unique instrument panel and door panel inserts; and ZL1-logo sill plates
    * Steering wheel audio controls with Bluetooth capability
    * Wireless PDIM and USB-port
    * Boston Acoustics premium audio system
    * Rear parking assist
    * Rear camera system (displayed in the inside rearview mirror).

Engineers have already driven Chevrolet Camaro ZL1 prototypes extensively at demanding road courses in the U.S. and Germany, with final testing being completed through the balance of 2011.
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Chevrolet Aveo Sedan, 2012


 Chevrolet Aveo Sedan, 2012

Prior to the launch of the highly successful Cruze, the Aveo was Chevrolet's best-selling car globally. An all-new Chevrolet Aveo goes on sale summer 2011 and it is designed to expand on the nameplate's success in the highly competitive small car market. It will be offered as a five-door hatch and as a sedan, each delivering excellent ride and handling characteristics and a sporty and sophisticated design, as well as roominess and fuel efficiency.

Equally at home on the daily commute to work or the weekend drive to the countryside, the new Aveo is a compelling choice for young and young-at-heart, style-conscious drivers - and it complements a range of exciting new Chevrolet designs that will be launched throughout 2011, Chevrolet's centennial year.

The latest edition of the Chevrolet Aveo is an all-new vehicle that includes a completely redesigned exterior and passenger cabin, a newly developed chassis and body structure, as well as an upgraded range of fuel-efficient, low-emission engines.

The Chevrolet Aveo has been engineered to make everyday driving in a small car a more dynamic and enjoyable experience, while delivering practical, hands-on solutions and value. In order to ensure responsive handling, engineers developed an all-new chassis for the Aveo that is among the most rigid in its segment.

Featuring a sporty exterior that speaks Chevrolet's global design language, the all-new Chevrolet Aveo appeals to the young and the young-at-heart. This holds true for both body styles, but especially for the five-door hatchback, with its aggressive, flowing body lines. Meanwhile, the all-new four-door version conveys a more mature, upscale feel. The notchback is aimed at young families in particular.

A road-gripping ride
The new Chevrolet Aveo's sporty driving experience is a key feature that contributes to the car's appeal. It consists of an exceptionally rigid body-frame-integral structure, with the upper body and the frame engineered as a single unit, ensuring a more mass-efficient and stiffer structure. Advanced steels used on the new Aveo have considerably greater tensile strength, which improves passenger safety.

A McPherson strut front suspension with coil springs and stabilizer bar, and a torsion beam axle-mount compound link-type rear suspension, deliver a tempered, stable ride. The vehicle's outstanding feedback to the driver is enhanced by electronic stability control (ESC) and a column-mounted electric power steering system (EPS), which is available on models equipped with the 1.2 liter gasoline or 1.3 liter turbo-diesel engines. This sophisticated support system includes a wear compensator to guarantee consistently precise steering as the vehicle ages.

Meanwhile, the Chevrolet Aveo's tight body-frame-integral structure is also key to the vehicle's advanced safety performance. In the event of an accident, the roof will be able to carry 4.2 times the car's weight. A carefully tuned set of sensors is wired to six airbags that are standard in Europe, along with a four-channel anti-lock braking system (ABS) with brake assist. In addition, the driver can activate cruise control with speed limiter function. Once the set maximum speed is reached, the system triggers an audible alarm.

Two distinctive body styles
The new Chevrolet Aveo's external styling will bring a fresh breath of youth and sportiness to the segment. At the front end, the Aveo's large, dual-port grille with the centrally positioned bowtie immediately identify it as a Chevrolet.

A key signature element distinguishing the Chevrolet Aveo is its exposed, motorcycle-inspired headlamps, which are devoid of any lens cover. They are housed in dual tubes, with high-gloss black bezels and chrome rings. Pronounced wheel arch forms, the 114 mm offset between the roof-rails and short overhangs underscore the hatchback's planted, assertive posture.

As is the case in the Chevrolet Spark, the hatchback's rear door pull handles are positioned in the upper section of the door, creating a coupe-like appearance. The hatchback's taillamps have no lens cover and play harmoniously with the vehicle's front-end design. In contrast, the notchback's rear lamps are enveloped by a dual element lens, delivering a touch of chic to the sleek, aerodynamically refined sedan. The Chevrolet Aveo Sedan is 360 mm longer than the hatchback, which measures 4039 mm in length.

All wheels feature Chevrolet's five-spoke design and are available in the following sizes and styles: 15-inch steel and alloy, as well as 16-inch and 17-inch alloy.

Sporty sophistication inside
A high level of detail applied in the design of the Chevrolet Aveo's passenger cabin has resulted in a more upscale execution that is typically seen in higher-segment vehicles. On the same trim level, there is no difference in interior layout or styling between the hatchback and the sedan.

The Chevrolet Aveo's distinctive dual-cockpit has been derived from the Chevrolet Corvette - one of the world's most iconic sports cars. It incorporates another distinctive design element - a wraparound instrument panel that flows into the driver's and front passenger's door. To the left and the right, round HVAC outlets protrude from the instrument panel surface.

The instrument cluster further carries the motorcycle theme apparent on the exterior, incorporating a round speedometer and a digital LCD readout. Ice-blue ambient backlighting adds a stylish, contemporary feel to the cabin.

Smartly designed stowage features enhance Chevrolet Aveo's attention to detail. Along with two glove boxes, including one with an integrated USB outlet, various small compartments and door pockets, as well as three cupholders at the front, provide generous storage space for items of many sizes. All electronic devices installed in the upper glove-box can be operated through the steering-wheel controls or radio interfaces.

The notchback's trunk provides 502 liters of cargo volume, ranking it among the best in class; the equivalent of 653 liters can be stored in the hatchback's rear, when the rear seat is folded - more than enough for a weekend foray or the preceding drive to the mall.

Efficient and fuel-saving powertrains
Fuel efficiency and enjoyable driving that creates a small environmental footprint were the main criteria guiding the design of the Chevrolet Aveo's engine lineup. The 1.6 liter gasoline engine (115 hp) gives the Aveo strong acceleration characteristics and an immediate feeling of performance during low-speed driving.

The petrol engine range also includes two 1.2 liter versions rated at 70 hp and 86 hp, respectively, a 1.4 liter unit (100 hp) and a 1.6 liter engine (115 hp). From this autumn, the new Chevrolet Aveo will also be offered with a 1.3 liter turbo-diesel engine - the first in a small Chevrolet in Europe - featuring common-rail fuel injection, start/stop technology and a variable-geometry turbocharger.

The 1.2 liter, 1.4 liter and 1.6 liter four-cylinder gasoline engines feature dual-overhead camshafts and variable valve timing. Their a cast-iron cylinder block is based on a hollow frame structure. The 1.2 liter and 1.4 liter engines feature a cast-iron bedplate that provides a stiffer structure, resulting in quieter and smoother engine performance. The 1.6 liter engine has a toothed timing belt that has a change interval of every 10 years or 160,000 kilometers.

Fuel consumption on a combined cycle is 5.1 liters/100 km for the 86 hp version of the 1.2 liter engine and 6.6 liters/100 km in the case of the 1.6 liter engine coupled with a manual transmission. The 1.2 liter Ecotec gasoline engine will emit 119 g of CO2 per km.

Ride & Handling
The Chevrolet Aveo delivers ride comfort and responsive handling traits that are designed to match the best in the segment. It is a car developed for global markets, but engineers tuned the Aveo specifically for the driving tastes of European customers, giving it a more athletic feel and balancing the vehicle for a broad range of driving conditions.

The Chevrolet Aveo's ride is tempered, stable and comfortable over virtually all road surfaces. It is fun to drive, while displaying vehicle dynamics usually associated with cars in higher price brackets. Moreover, various enhancements to its structural design and powertrain systems have resulted in a vehicle that is very quiet.

A tight chassis for confident road command
A wheelbase of 2525 mm, combined with wide, 1509 mm front and rear tracks, give the Chevrolet Aveo a firmly planted stance, which contribute to a balanced driving experience. The key enabler to its stability and confident road feel, however, is a very tight body-frame-integral (BFI) structure that ranks among the stiffest in the global small-car segment. Throughout the vehicle's structure, 10 percent more spot welds are used, while some of the steel selected to build the new Aveo exhibits tensile strengths of more than 1000 MPa or higher - twice as strong as the 340 to 550 MPa seen in the previous generation.

The chassis' main underbody rails run continuously from front to rear, providing great strength. A long, six-mount engine cradle contributes to lower noise levels, and smoother ride and handling dynamics. Specifically tuned engine mounts - including a hydraulic mount - are tailored to the engine's inherent torque axis, effectively disrupting the transmission of vibration and noise. This configuration also helps control the transfer of momentum, resulting in improved dynamic balance.

Sophisticated noise abatement
A stiffer structure also facilitates insulation of the powertrain and suppression of road and wind noise. Due to a drag co-efficient of 0.30, the Chevrolet Aveo has an excellent wind noise rating of 40.5 decibels at highway speed. Special damping mats, which are tailored to each specific powertrain package, act as an abatement to high-frequency noise transfer. Other measures aimed at achieving a quiet, pleasant cabin comfort level include the use of thicker glass for the windshield and windows, and the application of composite nylon baffles in various structural intrusions and of formed resin or felt blanket on the underside of the hood.

Liquid-applied sound deadening (LASD), by means of melt-on patches, is strategically applied to the interior body structure, dampening smaller section interfaces that may resonate over time. When compared to more conventional, adhesively applied damping material, these patches fit almost perfectly into the areas they are applied to. As a result, LASD achieves 10 to 40 percent greater damping performance over adhesively applied materials.

Small turn radius and advanced driving aid systems
An array of electronic systems assist the driver in maneuvering the Chevrolet Aveo through everyday traffic and more challenging driving situations. Turning diameter measures a tight 10.1 meters curb-to-curb, and less than three turns lock-to-lock, which are amongst the best in segment. In 1.2 and 1.3 liter diesel-equipped cars, a column-mounted electric power steering system (EPS) is available, which saves fuel when compared with an engine-driven power steering pump. In order to ensure precise steering action over the system's life, a wear compensator continually adjusts its interaction with the steering gear. This GM-engineered proprietary technology is an uncommon refinement in the segment.

The standard electronic stability control (ESC) system may apply individual brakes selectively to counterbalance oversteer and understeer, helping the driver maintain control. It also ensures more precise, controlled performance of the anti-lock system as well as exceptional traction and yaw stability.

The Chevrolet Aveo is equipped with a four-channel anti-lock braking system (ABS) that uses data input from wheel-speed sensors to reduce stopping distances. The enhanced steering control during braking maneuvers coupled with the brake assist system (BAS) allows for more efficient emergency braking. An integrated electronic brake distribution (EBD) system proportions brake pressure.

The Exterior Design
In line with its agile, athletic disposition, the all-new Aveo exhibits a purposeful, assertive appearance. From every angle, the redesigned Chevrolet Aveo Sedan and five-door models feature exterior forms that convey strength, stability and sportiness. A 114 mm offset between the roof rails and shoulder line, along with a track width of 1509 mm and pronounced wheel arches, ensure a confident, grounded posture. Progressive, raked body lines imply performance and suggest swift movement even when the car is stationary.

The five-door hatchback and four-door sedan versions share a number of design cues that immediately identify them as a Chevrolet. One of the most prominent exterior features is the large, dual-port grille. It consists of honeycomb grille inserts in matte-finish black and chrome surrounds in the upper ports of up-level LT and LTZ models. The iconic badge is center-positioned and sculpted into the cross bar separating the upper and lower grille ports. It is also located on the liftgate, carrying an acrylic-encased dimpled gold finish for a crisp, three-dimensional appearance.

A key design element distinguishing the new Chevrolet Aveo is its exposed, round headlamps. They are devoid of the traditional lens cover and were inspired by the lighting seen on motorcycles. Two dual tubes, with high-gloss black bezels and chrome rings, carry the quad-reflector lamps, bringing a sparkling look to the face of the vehicle. Lower outboard bezels finished in anthracite gray molded-in color and house fog lamps (top trim only).

The hood surface features a subtle centerline crease and crisp outboard scallops, running from the cowl to the forward hood line for a swept, aggressive appearance. A more forward-positioned cowl line and the Chevrolet Aveo's sharply inclined windshield result in a bold, aerodynamic expression.

Chevrolet Aveo hatchback: coupe-like appearance with five-door functionality
While both the hatchback and the sedan speak a design language that appeals to the young and young-at-heart, their shapes differ in several important aspects. The five-door hatchback comes in a tight, two-box package, with aggressive diving feature lines and short front and rear overhangs. A sharply forward-swept shoulder line extends from the upper rear corner of the greenhouse to the front wheel arches. It runs in parallel to the lower body side scallop, accentuating the hatchback's forward-moving dynamic.

Another distinctive Chevrolet cue is the hatchback's rear door pull handles, which are almost invisible at the rear upper portion of the door behind the glass. Just as in the smaller Chevrolet Spark, the result is a three-door-like appearance with five-door functionality. The front-door handles are mold-in color black on base models and body-color-matched on LT and LTZ models. Beltline chrome moldings are also available on LTZ models.

The rear hatch glass is curved at the outboard edges to flow in unison with the vehicle's rear quarters - a level of sophistication usually found in more premium segments. A standard body-color matched spoiler for enhanced aerodynamic performance runs along the upper and side perimeter of the rear window.

Similar to the layout of the headlamps, the hatchback's taillamps are exposed and consist of dual element reflector lamps framed by high-gloss black bezels and chrome rings - a contrast that plays in harmony with the execution seen at the front of the vehicle.

An upscale, sleek presence for the Chevrolet Aveo Sedan
The Chevrolet Aveo sedan shares the hatchback's purposeful, swift look, but features a number of characteristics that contribute to a more upscale, mature appearance. It is longer and wider (4399 mm x 1735 mm) than its predecessor, while its trunk has a cargo capacity of 502 liters - a 102 liter increase over the previous model.

A rearward-sweeping roofline, which leads to a slightly "shelved" upper rear quarter, delivers a visual suggestion of the sedan's wind-cutting sleekness. The rear window was extended toward the front of the vehicle, resulting in improved rear occupant headroom, aerodynamic refinement and greater overall visibility.

A slight spoiler lip is integrated into the upper rear trailing edge of the deck lid to further improve airflow. In contrast to the arrangement featured on the hatchback, the taillamps on the Chevrolet Aveo Sedan carry a dual-element lens. The red lens leads the eye to the white lens reverse lights. The result is a more upscale aesthetic expected of a sedan. The rear fascia carries a mold-in lower spoiler that contributes to the Chevrolet Aveo Sedan's already excellent aerodynamic shape.

Precision work: minimized body panel gaps and weld joints
The exterior fit and finish on the new Chevrolet Aveo exemplify the attention to detail apparent throughout the vehicle. Door-to-door, door-to-fender, hood-to-fender, and lamp-to-fascia gaps, for example, are all 3.5 mm or less.

Additionally, all surfaces are free of cladding or unnecessary applications, delivering a unembellished, pure appearance. Secondary surfaces, such as areas seen around door rings upon vehicle entry and exit, have been styled for a flush, finished appearance. This was achieved through welding techniques that ensure a cleaner surface in these areas as well as minimizing sealing between sheet joints and improving corrosion protection.

Interior Design
A small car with great performance and handling and a distinct, youthful appearance, the new Aveo also challenges competitors with a stylish, user-friendly passenger cabin. Its interior craftsmanship and refinements are designed to engage passengers with everything they see, touch or hear.

Cockpit emphasizes performance
Sportiness and sophistication characterize the Aveo's interior arrangement and details. The all-new Aveo features Chevrolet's signature dual-cockpit theme, originally a trademark of the Corvette, one of America's most iconic sports cars. Another key design element in the cabin is the wrap-around instrument panel. It flows from the dash into the doors.

The mid-instrument panel is available in dark titanium or red brick and is plastic-injection-molded with a low-gloss surface of textured three-dimensional technical grain. Meanwhile, the upper instrument panel and upper door surfaces are black. To the left and right of the instrument panel, round air conditioning (HVAC) outlets protrude from the panel surface. Non-woven materials were used to fabricate the headliner, rather than the traditional felt applications that are more common in the segment.

The instrument cluster carries forward the motorcycle-inspired theme introduced by the vehicle's exterior. It incorporates a round analog speedometer set within an asymmetrical LCD readout, with a large digital display. Both the instrument cluster and the integrated center stack design are illuminated with Chevrolet's ice-blue ambient backlighting, for a more upscale look and feel.

A three-spoke steering wheel is in tune with the theme of sporty refinement. A silver-metallic finish on the bottom spoke section and leatherette trim around the circumference is standard in LTZ models, while cruise control with speed limiter is available on all trims.

Abundant, practical and discreet storage opportunities
Both the five-door hatch and four-door sedan models of the new Chevrolet Aveo offer generous cargo space. This includes an under-seat pullout drawer and a storage compartment beneath the cargo floor (hatchback). The luggage capacity of the notchback is 502 liters, while the five-door's luggage compartment holds 290 liters with the rear seat in the upright position. When the rear seat - a 60/40 design - is folded, the hatchback has a storage capacity of 653 liters. Front-seat travel is among the best in the segment: 189 mm forward, 54 mm rearward, 28 mm up and 37 mm down.

The mid-instrument panel features an upper glove-box with two compartments and outlets for USB and auxiliary devices, enabling discreet connectivity of iPods, smart phones, and other electronic devices. They can be operated through the steering-wheel controls or radio interfaces. A second, large glove-box features a lid that is damped for quiet operation.

Large storage pockets on both sides of the upper center stack in the instrument panel provide easy-to-reach storage areas for mobile phones, CDs and many other items. Three cupholders are located in the center console: Two for the front passengers and one for the rear-seat area.

Comfort and connectivity tailored to satisfy different needs
Tastes and comfort requirements may vary significantly and so does people's need to use modern communications and entertainment equipment. The designers of the Chevrolet Aveo have allowed for such variations. Seats are offered in three trim levels, color-coordinated according to the mid-instrument panel's color. Heated seats are optional on LT and LTZ models.

Two configurations of radios with four- or six-speakers and auxiliary device control are available. The audio system is capable of playing personal devices, such as the iPod through either the radio or steering wheel control. The uplevel radio offers USB/iPod as well as Bluetooth connectivity for wireless devices and also allows hands-free phone operation.
Air conditioning is available on the Aveo and featured as standard equipment, depending on the model or sales region. It includes a standard air and pollutant filtration system.

Engines & Transmissions
Today, a new car, and particularly a new entry to the small car segment, is expected to offer excellent fuel economy and a low carbon footprint, along with great performance and durability.

The Ecotec 1.2 and 1.4 liter gasoline engines make their debut in the new Aveo, while a new 1.3 liter turbo-diesel will be the first diesel in a Chevrolet's small cars in Europe. It debuts this autumn and features a high-performance common-rail fuel-injection system and advanced, electronically controlled variable geometry turbocharger with intercooler.

Fuel-efficient 1.2L and 1.4L gasoline engines
With the introduction of the newest entries of GM's family of small-displacement engines, the Chevrolet Aveo's powertrain benefits from a range of enhancements that display a strong performance and excellent expected longevity.

The engines' cylinder block is based on a hollow-frame structure, with a cast-iron bedplate. This stiff foundation ensures exceptional balance, smoothness and a quieter ride. The engineers also succeeded in raising the compression ratio to 10.5:1, thereby increasing fuel efficiency and improving emissions.

Both the 1.2 and the 1.4 liter gasoline engines feature dual-overhead camshafts and variable valve timing. The four-valve head design provides increased airflow as well as optimized cooling circuitry and inlet ports. Depending on the engines' speed and operating conditions, the valve timing can be tuned for optimum performance over a wide range of engine speeds while reducing fuel consumption.

Among the key features contributing to the 1.2 and 1.4 liter engines' durability and overall performance is improved oil circulation. This was achieved by integrating an oil/water heat exchanger that allows maximum interstage cooling and keeps pressure loss to a minimum. The cylinder block and lightweight aluminum cylinder head have dedicated bores to improve oil lubrication of the cam phasers. Piston-cooling oil jets also enhance oil lubrication, thereby increasing the engine's longevity.

The 1.2 liter gasoline engine, which is expected to be the highest-volume for the Aveo range, delivers 86 hp, and 115 Nm of torque at 4000 rpm. Performance figures for the 1.2 liter engine, when combined with the manual transmission, include a top speed of 183 km/h and a 0-100 km/h time of 13.6 seconds. Fuel consumption with the manual transmission on a combined cycle is 5.1 liters/100km, while emissions are 119 g of CO2/km. The 1.4 liter gasoline engine delivers 100 hp, and 130 Nm of torque at 4000 rpm.

1.6 liter gasoline engine delivers greater performance
The Chevrolet Aveo's 1.6 liter gasoline engine is rated at 115 hp. Not only does 1.6 liter engine's larger displacement provide more power, it also supports a robust peak torque of 155 Nm, which gives the Aveo strong acceleration characteristics and an immediate feeling of performance during low-speed driving.

Like the 1.2 and 1.4 liter engines, the 1.6 liter features a hollow-cast iron block and cylinder head made of aluminum. Despite its increased complexity, it weighs three percent less than previous generations of the same family of engines, while exhibiting greater stiffness and structural strength. In fact, the weight of the cylinder block was reduced by 20 percent compared to engine offerings from the previous generation.

The 1.6 liter engine is equipped with a 16-valve cylinder head with dual overhead camshafts. It also uses dual-continuously variable valve timing and shares the use of piston-cooling oil jets and oil circulation optimization features, similar to the 1.2 and 1.4 liter engines.

Further refinements include a crankshaft sensor that is a first on these engines. It is fitted into the cylinder together with the crankshaft seal and measures crankshaft position at all times, thereby enabling smoother and more efficient operation. The Chevrolet Aveo's 1.6 liter gasoline engine has a toothed timing belt that has a change interval of every 10 years or 160,000 kilometers.

When combined with a manual transmission, the 1.6 liter gasoline engine enables the Chevrolet Aveo to attain a top speed of 189 km/h. Acceleration is rated at 11.3 seconds (0-100 km/h). On a combined cycle, fuel consumption is 6.6 liters/100 km. Emissions are 156 g/km.

All-new transmission lineup includes six-speed automatic
A five-speed manual transmission is standard with the 1.2 and 1.4 liter gas engines, while a higher-capacity five-speed manual transmission is matched with the 1.6 liter. A GM Hydra-Matic six-speed automatic is optional on models with the 1.4 liter and the 1.6 liter engines, while a six-speed manual transmission will be offered exclusively with the 1.3 liter turbo-diesel later this year.

Both five-speed manual transmissions use a single-piece, lightweight aluminum housing and feature triple-cone synchronizers for first and second gears, which foster smoother low-gear engagement and easier launch and shifting characteristics. In the higher-capacity five-speed manual, needle bearings for all gears result in low-friction gear meshing, enabling more comfortable shifting.

The Hydra-Matic six-speed automatic transmission that is available with the 1.4 liter and 1.6 liter engines represents Chevrolet's first application of a six-speed automatic front-drive transmission on a small car.

Ever increasing traffic volumes and limited amounts of space mean that even the most able, experienced and vigilant drivers may find themselves faced with the possibility of a collision in certain circumstances. Occupant safety is therefore an overriding objective for automotive engineers. The new Aveo is equipped with an array of safety features and sophisticated electronic control systems that are engineered to make it one of the safest vehicles in the small-car segment.

The backbone of Chevrolet Aveo's safety design is its exceptionally strong body structure provided by a body-frame-integral (BFI) structure. The BFI design is a single, welded unit consisting of full-length, high-strength frame rails and a safety cage. Welded tubular-section members are used to frame door openings and to support the roof while steel members reinforce the doors.

High-strength steels ensure stiff body structure
More than 60 percent of the body structure, as well as the six-point-mounted engine cradle, use high-strength steel. Ultra-high-strength steel is strategically integrated in the forward portion of the rockers and the center cross bar. The Aveo's engine cradle distributes energy in frontal and side impacts. It is another structural element that helps optimize occupant safety. Together with the front bumper system and the engine compartment rails, the engine cradle bars absorb the brunt of a frontal crash.

Reinforced front hinge and A- and B-pillar zones help maintain the integrity of the passenger compartment. Should the vehicle roll over in the event of an accident, its roof will be able to withstand forces that equal more than four times the car's weight. Engineers have also reduced the risk of injuries to the lower extremities by equipping the new Chevrolet Aveo with a releasable pedal assembly.

The rear of the vehicle is configured to encapsulate and effectively protect the fuel tank. A strong suspension cross member diverts additional impact loads to the rockers, after the rear longitudinal rails have crushed.

Intelligent sensor suite, six airbags standard
A set of sensors that controls the deployment of six standard airbags is mounted into Aveo's structure. The centerline of the vehicle incorporates the sensing and diagnostic module. Upon receiving data from the car's sensors, this electronic device establishes the severity of the impact and whether to deploy the airbags. In Europe, the Chevrolet Aveo features single-stage airbags for the driver and the front passenger, roof-rail airbags and side-impact airbags as standard.

The B-pillar features two side-impact sensors that prompt the roof-rail airbags, as well as seat-mounted thorax airbags and seatbelt pretensioners. If the Aveo's onboard sensors register that the vehicle "tips up" on a flat road surface, the brakes are activated to reduce lateral force.

When activated, the Chevrolet Aveo's cruise control with speed limiter function allows the driver to set a maximum speed and the system triggers an audible alarm once this speed is reached. Available as an optional feature, ultrasonic parking assist alerts the driver via an audible signal about the proximity of persons or objects located directly behind the Aveo. Meanwhile, an engine immobilizer offers a measure of security against car theft.

Reduced danger to pedestrians
All five seating positions have three-point seatbelts, with the front seats also featuring seatbelt pretentioners. The rear seating positions are equipped with a child-seat latching system. A possible collision of the car with pedestrians was also on the mind of the safety engineers who collaborated in the design of the Chevrolet Aveo. Its bumper system includes an energy absorber that surrounds the bumper beam. The elements are specifically designed to reduce the force of a potential impact.

Another major source of serious physical injury in car-pedestrian accidents is the secondary collision with the engine block. Therefore, a greater clearance between the hood and its relating hinge structure and the engine block has been allowed for in the new Chevrolet Aveo.
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Chevrolet Silverado HD, 2011


Chevrolet Silverado HD, 2011

On a validation drive of the new, 2011 Chevrolet Silverado HD heavy-duty trucks, engineer Brent Deep towed a 20,000-pound (9,072 kg) trailer for 245 miles (400 km) along I-70 between Denver and Grand Junction, Colo. - and he barely touched the brakes the entire way.

Deep relied on the Chevrolet Silverado's new, smart exhaust brake system to slow the truck/trailer combination on descents, helping prove the new system is suitable for the most demanding conditions. It was a drive across the heart of the Rocky Mountains and some of the interstate system's steepest grades, with altitudes ranging from Denver's approximately 5,000 feet (1,525 m) to more than 11,100 feet (3,400 m) at the Eisenhower Tunnel.

The Chevrolet Silverado HD heavy-duty lineup is broader than ever, with 11 2500HD models and eight single- and dual-rear-wheel 3500HD models - including a new 3500HD Crew Cab with a 6.5-foot cargo box. WT, LT and LTZ trim levels are offered, and popular features such as the EZ Lift tailgate and rearview camera system return. All models bring greater capability, improved ride and handling and a greater feeling of driver control. Depending on the model:
  •     Segment-best fifth-wheel towing capacity of 20,000 pounds (9,072 kg)
  •     Segment-best conventional towing capacity increases up to 23 percent, with a maximum of 16,000 pounds (7,272 kg)
  •     Segment-best payload capability of 6,335 pounds (2,873 kg) on a complete vehicle
  •     Segment-best Gross Combined Weight Rating increases to 27,500 pounds (12,500 kg)
  •     Gross Vehicle Weight Ratings increases up to 17 percent to 13,000 pounds (5,909 kg)
  •     Front Axle Weight Rating increases by up to 25 percent to 6,000 pounds (2,721 kg)
  •     Snow plow capability is now enabled for all 4WD cab configurations
There are also enhanced powertrains, including a new Duramax 6.6L diesel/Allison 1000 six-speed transmission that offers the exhaust brake system, new front and rear suspensions, an improved brake system, hill start assist, trailer sway control system and more.

Outside, the 2011 Silverado 2500HD and 3500HD models are distinguished by a power dome-style hood with a new, louvered design, as well as a new grille and full-width chrome steel front bumper. A new lineup of 17-, 18- and 20-inch wheel/tire combinations is featured, too (20-inch polished forged aluminum wheels are available on 2500HD).

Designers and engineers left almost no bolt unturned during the comprehensive redesign of the trucks. Here are 11 key elements that demonstrate the 2011 Chevrolet Silverado 2500HD and 3500HD are ready for any job and any competitor:

New frames
In the quest to comprehensively redesign the Chevrolet Silverado HD chassis to improve durability and ride, while also supporting increased capability, engineers developed 11 all-new, fully boxed frame assemblies. The frames have increased cross sections and use more high-strength steel for greater durability, higher towing capacity and improved ride and handling; the front sections are hydroformed.

The bending and beaming stiffness of the frames is increased 92 percent and 20 percent, respectively, with the fully boxed sections enhancing torsional stiffness by a factor of five. Also, larger engine and transmission mounts, coupled with a 125-percent-stiffer front frame structure, provide greater vibration control, while hydraulic body mounts are incorporated under the cab section on extended and crew cab models for a more isolated feel inside.

Engineers addressed common customer and aftermarket uses when designing the new frames, including adding access holes to the rear frame section to enable easier installation of fifth-wheel/gooseneck-style hitches. Also, the frame-mounted hitch for conventional trailering is stronger, with a box-tube design. It supports up to 16,000 pounds (7,257 kg).

New and strong independent front suspension
A completely redesigned independent front suspension system offers up to a 25-percent greater front axle weight rating - up to 6,000 pounds (2,721 kg) front gross axle weight rating (FGAWR) - enabling a snow plow to be used on all 4WD cab configurations with the available snow plow prep package, while also supporting improved ride and handling characteristics.

The Chevrolet Silverado's signature short-long arm/torsion bar front suspension design is retained, but now features new, forged steel upper control arms that are stronger and lighter than their predecessors. The new lower control arms are made of precision-machined cast iron to handle the greater loads. Five different torsion bar rates support five different front gross axle weight ratings (a single torsion bar was previously used for all models). This helps stabilize the range of trim heights of various models under load, while enhancing appearance, handling, durability, tire wear and alignment. The trim height is adjusted on each bar via a single bolt, easily allowing the height to be changed to account for the weight of a snow plow or other accessories.

The Chevrolet Silverado HD front suspension now uses a pair of urethane jounce bumpers on each side, instead of one, for improved load management; and there's a new upper shock mount attachment design that's positively connected to the frame with two fasteners. This design eliminates squeaks and clunks, while supporting higher load capability and increased durability.

Compared to competitors' beam-axle front suspension, the Silverado's independent front suspension provides a better ride, more accurate trim height control (with fewer parts) and greater flexibility to adjust the alignment for weight and tire sensitivity.

New asymmetrical leaf-spring rear suspension
Commensurate with the Chevrolet Silverado HD's greater strength and capability is a rear suspension designed to support greater loads. It features a new, larger asymmetrical leaf-spring design that also contributes to improved ride and handling characteristics.

The asymmetrical design is derived from unequal front and rear spring half lengths, which minimize axle hop and enhance traction control efficiency. 2500HD models feature a two-stage leaf-spring design, while 3500HD models have a three-stage design. All models feature 3-inch-wide (76 mm) leaf springs that are 20-percent wider than previous models.

The larger leaf-spring design supports increased rear gross axle weight ratings across the board. On the 2500HD models, the rating is 6,200 pounds (2,818 kg) - up from 6,084 (2,765). On 3500HD models, the rating increases to 7,050 pounds (3,204 kg) on single-rear-wheel models and 9,375 pounds (4,261 kg) on dual-rear-wheel models - the latter representing a nearly 14-percent increase over the previous 8,200-pound (3,727 kg) rating.

Segment-leading towing and payload capability
Stronger frames, suspension systems with greater weight ratings and enhanced powertrain systems contribute to the Chevy Silverado HD's class-leading towing and payload capability. The specifications charts included below outline capacities for each model and/or configuration, but here are the key facts:
  •     The maximum conventional (ball hitch) towing rating increases to 16,000 pounds (7,257 kg)
  •     A Silverado 3500HD crew cab/long box can tow up to 20,000 pounds (9,091 kg) with a fifth-wheel hitch. The 2010 Ram 3500 has a maximum rating of 17,600 pounds (8,000 kg) and the 2010 Ford F-350 is rated at a maximum of 18,800 pounds (8,545 kg). It should be noted that while Ford claimed segment-leading trailering and payload during its recent announcement of the 2011 Super Duty models, no towing ratings were issued
  •     The maximum payload (3500HD) is 6,335 pounds (2,873 kg) - that's nearly 11 percent greater than the 2010 Ford F-350's 5,730-pound (2,604 kg) rating and about 24 percent more than the 2010 Ram 3500's 5,130-pound (2,331 kg) ratings. Again, while claiming segment-leading payload for the 2011 Super Duty models, Ford did not announce the ratings
New 6.6L Duramax diesel and Allison 1000 six-speed combination
Helping the new 2011 Chevrolet Silverado HD trucks deliver their best-in-class capabilities is a new version of the workhorse Duramax 6.6L diesel and Allison 1000 six-speed automatic transmission powertrain combination. The Duramax 6.6L is more powerful and durable and the Allison 1000 is stronger and helps enable new features, including the exhaust brake system. Together, this improved version of a proven combination is also expected to deliver segment-best fuel economy.

The Duramax 6.6L's new and improved:
  •     Horsepower and torque expected to top previous model
  •     NOx emissions reduced at least 63 percent over 2010 models
  •     Quieter operation
  •     High-pressure (30,000 psi/2,000 bar) Piezo-actuated fuel system for greater fuel efficiency, improved performance and reduced emissions
  •     Exhaust brake system that enables controlled vehicle slowdown on downhill grades without actuating the brakes
  •     Selective catalytic reduction after-treatment system using diesel exhaust fluid (DEF) injection to provide the best overall diesel characteristics and performance - with a range of about 5,000 miles (8,000 km) between DEF refills
  •     Combustion and after-treatment have been optimized to provide about 700 miles (1,125 km) between diesel particulate filter regenerations - a 75-percent improvement over the previous system and significant contributor to improved fuel efficiency, as the regeneration process requires additional fuel
  •     B20 biodiesel capability for an alternative fueling option
  •     Internal revisions that improve durability
With nearly 1.3 million Duramax 6.6L engines produced since 2000, they have proven exceptionally durable and dependable. The internal elements that helped build its reputation are enhanced for 2011:
  •     Main bearings' profiles changed to enhance oil film thickness
  •     Oil pump flow increased for increased pressure at low speeds
  •     The turbocharger's oil circuit is changed to provide increased pressure at the turbo and faster oil delivery
  •     The connecting rods' pin ends are modified to provide increased piston support
  •     New, higher-strength piston design that eliminates bushings to provide lower reciprocating weight
  •     An EGR cooler bypass reduces high-mileage soot deposits in the cooler and EGR circuit
The enhanced Allison 1000 for 2011 is strengthened to handle the higher torque capability of the new 6.6L Duramax engine, while also helping improve fuel economy and provide seamless assistance with a new exhaust brake system. Greater efficiency is delivered through reduced "spin loss" - meaning, the transmission channels more of the engine's power to the axles, allowing it to do more with less fuel.

The Allison 1000 also features driver shift control with tap up/tap down shifting and a patented elevated idle mode cab warm-up feature. Also, the tow/haul mode reduces shift cycling for better control and improved cooling when towing or hauling heavy loads. The six-speed configuration retains its two overdrive gears for optimal efficiency.

Performance with the Duramax/Allison combination is also improved over previous models, with preliminary testing showing 0-60 mph times of less than 9 seconds and quarter-mile times of less than 16 seconds in 2500HD models. That's about 0.3-second and 0.5-second quicker, respectively, than previous models.

Strengthened Vortec 6.0L/Hydra-Matic 6L90 six-speed powertrain
The venerable Vortec 6.0L gas V-8 with variable valve timing returns to the new heavy-duty trucks, along with a strengthened version of the Hydra-Matic 6L90 six-speed automatic transmission. This combination delivers excellent performance and efficiency, with a greater emphasis on low-rpm power.

A new camshaft profile in the Vortec 6.0L helps the engine produce more torque lower in the rpm band, for improved launch feel and a greater feeling of overall performance at higher altitudes and when towing a trailer.

The 6L90 is enhanced for greater strength, smoothness and quietness via:
  •     Adding four attachment bosses to the transfer case adapter (4WD models) for increased strength and smoother, quieter performance
  •     Increasing the cross section size of the transfer case adapter for greater strength
  •     Adding a new, stronger output shaft
  •     Adding a new heat shield and vent hose
Exhaust brake system
A new feature on Duramax-equipped models is an exhaust brake system. This driver-selectable feature uses the turbine control of the variable geometry turbocharger and the compression of the engine to generate backpressure, slowing the vehicle without applying the brakes. It is a smart system integrated with the cruise control feature and varies the braking to account for the grade and vehicle load.

Large brakes
Brake feel and performance is greatly improved with the 2011 Silverado HD trucks. The standard four-wheel disc system is completely revamped to deliver smoother, more immediate and confident-feeling performance. Four-wheel, four-channel ABS is standard on all single-rear-wheel models and a three-channel system is standard on dual-rear-wheel models.

The front and rear rotors are larger in diameter - 14 inches (355 mm) - and width on all models to support their increased capacity, weight ratings and trailering ratings, while the calipers are stiffer and stronger. The hydroboost brake booster calibration is revised for reduced pedal effort and the travel of the pedal is also revised for a more comfortable, confident feel.

Refined and capable ride, handling and steering
Longer wheelbases - ranging from 133.6 inches (3,395 mm) to 167.7 inches (4,259 mm) - and wider front/rear tracks enhance the ride and handling characteristics of the Silverado 2500HD and 3500HD, giving them a greater feeling of smoothness and control.

The longer wheelbases and wider tracks are complemented by the new, stiffer frames, new jounce bumpers, shock mounts and hydraulic body mounts to provide a solid, smooth and isolated driving experience. New shocks were specially valved to support the new trucks' weight ratings, while balancing excellent ride characteristics.

Comprehensive safety and functional technology
The 2011 Silverado 2500HD and 3500HD models have a comprehensive roster of safety features and functional technologies:
  •     StabiliTrak electronic stability control system on all single-rear-wheel models
  •     Larger, four-wheel disc brakes with standard four-wheel ABS
  •     A new high-strength steel tubular frame cross member that enhances safety and improves crashworthiness
  •     Seat pelvic/thorax and head curtain side air bags available on 2500HD
  •     Available rear backup camera
  •     Segment-exclusive OnStar 9.0
  •     Trailer sway control system on all single-rear-wheel models
  •     Hill start assist (standard on single-rear-wheel models)
Trailer sway control system provides an added measure of confidence when towing a trailer. The system senses conditions of trailer sway and intervenes with braking and/or reduced engine power to bring the trailer under control and keep it on its intended path. The system will use electric trailer brakes when a trailer is plugged into the standard wiring harness of the truck and its performance requires no input from the driver.

The hill start assist system is automatically engaged when sensors detect the vehicle is on grade of about 5 percent or greater. It holds the brakes for about 1.5 seconds or until the gas pedal is pressed, preventing rollback - it is particularly effective when towing, giving the driver time to switch from the brake pedal to the gas pedal without rolling.

Lives bigger, drives better, works harder
From the available remote starting feature to the unimpeded access offered by the 170-degree-opening rear access doors on extended cab models, the 2011 Chevy Silverado HD models live bigger, drive better and work harder. The interiors are refined, with improved quietness and attention to detail, but designed for working. Numerous storage compartments provide covered access for everything from work gloves to laptops.

All 2011 Silverado 2500HD and 3500HD trucks work under the best warranty coverage in America - five-year/100,000-mile limited powertrain warranty, plus roadside assistance, courtesy transportation and other features that provide assurance that Chevrolet backs its trucks confidently.
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