Quote:
Originally Posted by Old Mechanic
Most gas-electric hybrids can not recuperate any more than one third of the energy in regeneration, while the hydraulic configurations developed 10 years ago were at 78%, using a bent axes pump that was spinning at prop shaft speeds which forced the pump to sping at 3.5 times the speed of the wheels. The solution was to move the drive pump to the wheels where rotational speeds seldom exceed 1000 RPM and pump efficiencies easily stay above 90%, compared to 75% at speeds above 3000 RPM.
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I'm guessing there must have been some issues or we'd have production versions now? I'm really interested in doing something like this for my VW, connected to an AWD rear subframe.