Monday 10 January 2011

Chevrolet Tahoe Hybrid

The plan, a hybrid variant will be present in the whole range of Chevrolet products, from small to large SUVs like the Tahoe this. This is possible thanks to the uniqueness of the hybrid system is used.
System adapted to the Tahoe Hybrid has 2 modes of operation. Namely dynamic style CVT gear ratio, and fixed ratio mode for transporting heavy loads. Herein lies the toughness of the hybrid system for the SUV with the weight of 3220.56 kg. The whole system is set on the Electrically Variable Transmission (EVT) with 2 electric motors integrated.
The first mode is used at low speed and light weight. This mode operates in 3 ways: electric motor driven, motor fuel, and a combination of both. This mode is the most economical yet still provide a large force at any time if needed.
The second mode is used primarily for running on the freeway, under full load, or need towing ability. In this mode combustion engine assisted by an electric motor will work. While working with a fixed transmission ratio to ensure the transfer of engine power as needed.
And the result is the efficiency that is claimed to reach 50% compared to non-hybrid version with 5300 cc engine. This variant is claimed to reduce fuel consumption up to 9 km / liter. This figure is equivalent to the cars the engine capacity of one quarter.
However, the performance is not only thanks to the contribution of electric motors only, but the role of 6000 cc V8 petrol engine which is equipped Active Fuel Management (AFM). The system is able to kill 4 of 8 cylinders when not needed. While technology Late Intake Valve Closing (LIVC) function to accommodate the Atkinson cycle to minimize losses due to pumping loss, throttling loss, and improve work per cycle of the engine.
To support this engine efficiency, aerodynamics sector also improved. Airdam in the front bumper is made lower, Footstep on the left-right body formed more aerodynamic. While the D pillars installed a new spoiler to improve aerodynamics value.
Not only that, the diet program is also done with a few changes to material specifications. Hood and rear doors are made of aluminum plate. While the lightweight aluminum rims that are used are designed aerodynamically, and the combined tire with low rolling resistance.
Unfortunately, although a large cabin, you will find it a bit limited headroom. Once the ignition is turned, the engine will live while the hybrid system in the process of initiation. If detected the battery in a full condition, the motor fuel burning only a few moments.
Wheel has a shape similar to that of the Chevrolet Captiva, the difference is only in color and the buttons on the right side. Round this steering feels light thanks to the hydraulic power steering system that is driven by electric pumps.
A typical American car, the transmission lever is placed on the steering column to the right. In addition there is a button (+) and (-) for manual operation. To reduce engine load, air-conditioning compressor are also driven by electric motors. That way, AC is also still able to cool the room even though the engine is off.
Nickel-Metal Hydride batteries in the Energy Storage System (ESS) has a capacity of 300 volts. Battery circuit is placed under the bench second row without changing the basic structure of Tahoe. Even third-row bench position was unchanged, and still can be folded or removed to add space goods.
With the figure of a very large, Tahoe Hybrid retains the initial torque is very powerful. In addition, transfer of power from the gasoline engine to an electric motor or otherwise occur in a very subtle and difficult to distinguish. So is the shift 4-speed transmission with 4 coupling that occurs without a pause as if using a CVT.
http://www.autobildindonesia.com/

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