A good read is to look at what Honda did to make the VX the non hybrid mileage champ of the Honda line from 92-95.
I actually have design for a valveless variable compression rotary piston engine. It has an additional capability of destroking itself completely and storing energy in its own spinning mass as a flywheel.
Combined with an Infinitely Variable, in wheel transmission at each wheel. it provides a potentially game changing powertrain configuration.
regards
gary
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