07-20-2006, 03:04 PM
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Super Moderator & Contributor ($)
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Posts: 1,672
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Re: 2007 Chevy Silverado
Found this:
Quote:
Flywheel Alternator Starter (FAS) System
GM hybrid pickup trucks get more miles from each gallon of gasoline mainly because of the engine start/stop function and regenerative braking, which turn the motor into a generator as the truck decelerates. Extra fuel savings come from quickly shutting off fuel any time the truck is coasting or braking, using the electric motor to make the transition seamless to the driver.
Instead of a conventional starter motor and alternator, the hybrid truck features a compact electric motor integrated between the engine and transmission, known as a flywheel alternator starter system. The 14,000- watt electric motor provides fast, quiet starting power, the ability to generate up to 2,400 watts of continuous electric power, and 10% fuel savings.
The electricity generated by the system has many uses. It may be stored in a 42-volt lead-acid battery pack for future use, used to support on-board electric accessories, operate power tools, or even run essential home appliances during power outages using the pair of 120-volt, 20-amp outlets in the cab and bed. This technology is currently available to fleet and commercial customers throughout the country and is available to retail consumers in Alaska, Washington, Oregon, California, Nevada and Florida.
The FAS system is in production on the 2004 model year Chevrolet Silverado hybrid and GMC Sierra hybrid trucks. The hybrid trucks are available as an extended-cab pickup truck on the Chevrolet Silverado and GMC Sierra. It is equipped with a 42-volt lead-acid battery pack, a modified 4-speed automatic transmission, 5.3L V8 engine, and is available in both 2WD and 4WD.
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Here:
http://www.gm.com/company/gmability/...1_alt_hyb.html
So it looks like GM's FAS is very similar to Honda's IMA except that GM's FAS runs at much lower voltage.
If it was only an autostop system I would not call it a hybrid but since it stores energy during regen for later use as assist it is a real hybrid.
Details are remarkably hard to find......
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