Hi am vaikunth i would like to get details on download pdf for hydraulic hybrid system for four wheeler ..My friend salman said download pdf for hydraulic hybrid system for four wheeler will be available here and now i am living at bandra and i last studied in the college/school sspm coe and now am doing be i need help on

Hydraulic hybrid vehicles, or HHVs use a pressurized fluid power source, along with a conventional internal combustion engine (ICE), to achieve better fuel economy. They capture and reuse 70%-80% of the vehicle's braking/decelerating energy[1] compared to 25% for electric hybrids.[citation needed] For trucks and buses, this can also be less expensive than electric systems, due to the price of batteries required for the latter.

While all hydraulic hybrids use reservoirs, accumulators and pumps, there are two ways those components can be coupled with a vehicle. The first, a parallel hydraulic hybrid, simply connects the hybrid components to a conventional transmission and driveshaft. (To learn more about transmissions and driveshafts, read How Automatic Transmissions Work and How Manual Transmissions Work). While this allows the system to assist the gasoline engine in acceleration (when the gasoline engine is working its hardest), it doesn't allow the gasoline engine to shut off when the vehicle isn't in motion. That means the vehicle is always burning gas (unlike gas/electric hybrids, which have engines that shut off at slow speeds or during a stop).

Still, the parallel hydraulic system does have significant benefits, including a 40 percent increase in fuel economy [source: EPA]. Though not in widespread use yet, parallel hybrid systems could be added to regular vehicles. As it is now, however, most parallel hydraulic vehicles are built with the system in place and are used in heavy-duty delivery vehicles, not passenger cars.