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by unfoldedCravat 809 days ago
Mazda has a super interesting way of doing this. When paired with an electric motor/generator, they can speed up/slow down specific parts of the combustion cycle to essentially get vvt. I think they can only really do this as a range extender due to the fact it makes power delivery a little bit weird.

https://carbuzz.com/news/mazdas-new-rotary-engine-variable-v...