Quote:
Originally Posted by Christ
With a hydraulic drive system, the fueled engine runs at it's most efficient RPM/load ALL THE TIME. Your car doesn't do that.
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Any sort of hybrid is always going to be a trade-off between efficiency, emissions, engine wear, and performance like any other car. W/ a hydraulic hybrid based on a typical car, the engine would have to cycle on and off much more because the accumulator would have to be relatively small or w/ a smaller engine performance would be sub-par compared to a hybrid. If the accumulator is as large as a battery pack in terms of energy storage then the car would weigh a half ton more than a comparable hybrid and performance would suffer. It's all about trade-offs and HHs just don't offer the same characteristics that HEVs do and consumers want for whatever price.