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A comment on Nobody understands the point of hybrid cars [video]. Parent comment

Re:Nobody understands the point of hybrid cars [video] by Szpadel on Wednesday May 20, 2026 @08:34AM (#48206667)
I'm assuming that right now all valves as computer controlled so why we cannot have best of both worlds? cannot we dynamically switch between Otto and Atkinson cycles by just changing valve profiles?

computer could use Otto cycle in case more power is needed in rare situations

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Re:Nobody understands the point of hybrid cars [video] by Tade0 on Wednesday May 20, 2026 @08:47AM (#48206796)
> cannot we dynamically switch between Otto and Atkinson cycles by just changing valve profiles?

Toyota introduced this exact behaviour with their "Variable Valve Timing-intelligent Electric" (VVT-iE) system:

https://toyota-club.net/files/faq/16-01-01_faq_vvt_ie_eng.ht...

It uses an electric motor to control intake valve timing.

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Re:Nobody understands the point of hybrid cars [video] by bluGill on Wednesday May 20, 2026 @08:40AM (#48206736)
AFAIK all values are controlled by a camshaft. The computer doesn't get enough control. Solenoids seems like that are a possible replacement for CAMs, but they apparently have too many downsides.
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Re:Nobody understands the point of hybrid cars [video] by vel0city on Wednesday May 20, 2026 @10:50AM (#48208816)
Koenigsegg has an engine design that has a camless valve system based on their "Freevalve" technology. Its pretty cool.

https://en.wikipedia.org/wiki/Koenigsegg_TFG

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