Cars - For Car Enthusiasts

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Rotary Valves Make Normal Valves Look Silly - Why Aren't We Using Them? - YouTube (youtu.be)

submitted 3 months ago by BallShapedMan to c/cars

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I had no idea this type of valve was a thing. Interesting to learn a little about. Maybe something like this would make electrically controlled variable timing more viable and thus improve the efficiency of ICEs?

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[–] [email protected] 3 points 3 months ago (1 children)

Had an RX8 for a tad. Rotary was fun, but reliability wasn't there. Apex seals are a routine thing. Miss that car, but don't miss the repairs.

These rotary valves are totally different, but I can imagine the additional distance and air pathway from the valve to combustion chamber would significantly decrease compression ratio. Turbo/supercharged would probably be mandatory to compensate. Perhaps this tech would probably find it's way on large displacement industrial engines first.

[–] [email protected] 1 points 3 months ago

Yep, this valve would have similar challenges to a rotary engine, since they're effectively one big rotary valving system.