Copyright 2005
HUMMER H2 TECHNOLOGY:
Engine
Pumping the life blood of the new H2 is the Vortec 6000 V8 engine. With a 4-speed auto transmission, an estimated 316 horsepower (@4600 rpm) and estimated 360 lbs./ft (@4000 rpm) of torque, we're talking about the kind of power most SUV's can only dream about.
Power balanced to help make smooth cruising on the highway as natural as climbing fallen logs when you're out in the rough stuff.
The V8 uses a Hitachi throttle body as a part of our precise electronic throttle control (ETC) system so the H2 provides two different throttle progressions, depending on whether it is operating on pavement or off. Out in the rough stuff, a touchy gas pedal would make for some very herky-jerky off-roading. So in the H2 we've taken throttle control to the next level. With the transfer case either in the High Open or High Lock mode, the driver gets normal acceleration for everyday city and highway requirements. However, off-road operation in the low open or low locked mode, requires a slower, more controlled throttle response.
Anti-lock Braking System (ABS)
Adding to the overall sense of control in the H2 is a four-channel antilock braking/traction control system (ABS/TCS). In addition to providing optimum control on slippery surfaces, the ABS can detect and adjust its braking capabilities to rough off-road surfaces like gravel and potholes.
The H2's ABS is uniquely designed to detect rough road surfaces and respond accordingly. As a result you may not even be aware that the ABS system is engaged, you'll just come to a smooth responsive stop.
The brakes also include GM's standard dynamic rear proportioning feature, which monitors wheel speed and, as needed, automatically modulates the pressure applied to the rear brakes to help ensure that braking loads are balanced between the front and rear brakes.
The brake design itself also includes large organic brake pads and twin piston cast iron calipers for the front and rear (57 mm-sized calipers for the front; 51 mm-sized calipers for the rear).
4-wheel Drive
H2's standard powertrain-integrated, two-speed, full-time 4-wheel drive system is highly advanced and extremely capable, with an electronically controlled transfer case providing five different operational modes it creates optimal performance under any driving condition.
Front Suspension
The independent front torsion bar has a 46mm diameter tubular front stabilizer bar with unique tuning and a 4000 lb. capacity axle.
The front shocks have a large, high-strength 40mm center tube as well as a secondary integral bump stop feature. This allows them to absorb jolts at two junctures.
Rear Suspension
The optional rear air spring suspension system has several features making it smoother on-road and even more capable off. With a longer suspension stroke it can handle bigger bumps and jolts while off-road. Longer, 719mm length shocks are used to provide an additional 20mm of rebound travel over that of the coil spring suspension. This improves traction by helping to maintain wheel contact with the ground over undulating terrain. And the shock absorbers, although having the same 46mm diameter as those with the coil spring suspension, also feature a larger-diameter size rod for increased durability.
The rear air suspension also has an automatic load leveling system and rear height elevation system. If you load up the rear of the H2 the load leveling system will detect the drop in ride height and will pump more air into the springs to restore a level condition. And if you need just a couple more inches of clearance the rear height elevation system will increase the rear height by 50mm (2in) and increase the rear departure angle from 35.9 to 41 .
TCS/TC2
The Single Wheel traction control system gives you traction when you need it most. The system detects a slipping wheel and applies brake pressure to slow it down, it then takes the energy that would have otherwise gone to the slipping wheel and transfers it to a wheel that's not slipping. With this system, you could have as many as three wheels on a slippery surface (virtually no traction) and still get enough torque out of the fourth wheel to move the truck up a 10% grade.
The H2's base TCS mode is great for normal hard surface traction needs, like on-road use, off-road rock crawling or ice and snow. But once you hit a variable surface like deep mud, sand or gravel the TC2 takes over. The TC2 works just like TCS but allows limited wheel spin to help gain even more traction.
So with three transfer case selections, two rear axle differential selections and two modes provided by the TCS mode switch, you actually have a total of seven driving mode selections in the H2, providing you with the ability to match the performance of the H2 with almost any driving condition.
Flat side body panels
Even at a glance the H2's rugged good looks indicate its HUMMER LIMO DNA. The H2's body lines and nearly vertical windshield and windows, not only call to mind the H1, but also create a significant amount of interior room and better. Exposed components, like hood lift handles, hood latches and fasteners, gives H2's appearance a component-assembled quality.
Wheelbase
The H2's 122.8 in. wheelbase combined with its 189.8 in. body length not only help give the H2 an incredibly smooth ride both on road and off, they help make the H2 stable and help prevent it from pitching in rough terrain.
Overhangs
Extremely short overhangs, including a 32.6 in. front overhang and a 34.6 in. rear overhang provide high approach and departure angles, helps the H2 to drive right into a hole and out again without getting hung up in front or rear.
Tread width
A wide tread due to the wheels being positioned at the extreme corners, gives the H2 incredible stability off-road, and even more on-road.
Bumpers
Like many other H2 components, the bumpers are unusually large and hefty. They also have a two-sectional design to help reduce weight while still providing optimum protection.
The front bumper also includes large, H1 military-style retrieval loops. The rear bumper includes tow loops which can also serve as tie-downs and both bumpers have access holes for the hitch receivers which can be attached to the chassis. The front receiver accommodates a winch, which can be plugged in just like a trailer hitch. The front receiver, like the rear receiver, also accommodates a regular class 3-trailer hitch, providing additional flexibility by allowing you to nose a boat into a garage for example.
Skid Plate
Nobody likes to resort to it, but sometimes a skid plate is the only language boulders understand.
That's why you'll find a 4mm thick, stamped aluminum front engine shield that runs from the front bumper of the H2 right back to the transmission. It angles prominently at the front, with the H2 logo embossed just below the bumper. 1in. diameter tubular steel, ladder-type shield helps protect the transmission and the exhaust system's two catalytic converters.
A third, high-tensile strength, galvanized steel shield protects the transfer case.
3-Piece Ladder Frame
An extremely strong, fully welded ladder-type frame, featuring a modular three-piece design and several hydroformed components provides outstanding strength, stiffness and dimensional accuracy for the H2's chassis.
Front section - The hydroformed front section helps create the H2's high approach angle. To improve the frontal crush zone, GM engineers added reinforcements in key box sections of the frame, enhancing its ability to absorb energy, crush and collapse. Uncommonly flat crossmembers were used around the transmission mounting area to preclude hang-up points. And the front frame section incorporates a GM-first standard winch receiver designed to handle an impressive 9,000 lb winch.
Mid frame - The mid-frame has a stamped-steel box section design with common inner and outer sections and a clamshell-welded configuration. It's strength and stiffness help minimize ride and body vibrations, contributing to a smooth ride on-road and providing the strength and stiffness required to handle the severe bumps and jolts that come when you're off-road.
Rear frame - The hydroformed, short rear-frame section helps create a high departure angle. It's heavily reinforced in key areas for the H2's 8,600 lb. GVWR capacity. The rear section incorporates a standard, integral trailer hitch receiver built right into the last crossmember of the frame rail and developed into the bumper. And a class 3 trailer hitch comes standard.
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