Talk:Hydraulic hybrid vehicle

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Principle

This article makes it seem as though the hydraulic system is the component which powers the car during all phases of operation. To the best of my knowledge, hydraulic systems are used to convert kinetic energy (a vehicle moving forward) to stored energy (pressurized fluid/gas) where instead of a typical braking system the car expends forward momentum into pressurizing some hyrdraulic system. Then on initial acceleration the pressure is released into the wheels aiding acceleration. This method makes sense, as in, it doesn't break physics. Of course, there will still be some energy loss in the hydraulic braking; i.e., the car will not be able to retain its prior to braking speed by using the stored pressure alone (entropy always increases). I do not believe that a car would be capable of pressurizing enough anything to propel it even down the street. —Preceding unsigned comment added by 136.159.16.110 (talk) 03:41, 10 March 2010 (UTC)[reply]

The above comments relating to converting kinetic energy into stored are true relative to a parallel HHV only. —Preceding unsigned comment added by 209.221.240.193 (talk) 19:57, 20 April 2010 (UTC)[reply]