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This is peripheral to your idea, Logic, but Mazda is using the rotary again in nearly the exact way described - as part of a serial hybrid. Rotaries have many of the same characteristics (and drawbacks) of two strokes, and even have similar power density.
Best I recall, Mazda managed to greatly improve the rotary efficiency and emissions by coupling the rotor to a small motor, which actually slows down and speeds up the rotor during small parts of its revolution, to achieve different combustion chamber characteristics. One could similarly do this with a reciprocating piston engine, for example changing the dwell time or speeding the piston up as it approaches TDC.
I don't see why a two stroke could not be made extremely clean or efficient as long as it did not need to operate in a wide range of conditions. It's just a matter of implementation. However it would almost certainly need to be paired with a relatively large battery, given that the compromises of running outside its ideal conditions would be much more severe, and extra buffer would be needed to prevent that.
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