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 2 months ago by [email protected] to c/[email protected]

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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] 1 points 2 months ago (1 children)

I had the same thought, these seals aren't containing oil like a camshaft seal, they're actually dealing with compression forces. Maybe not directly, but still there's a pressure differential.

I didn't think of airflow dynamics, but yeah this thing is basically the lever valve thing in your garden hose adapter spinning at a few thousand rpm regulating combustion gasses. I could see it doing weird stuff when the valve is only partially open, especially when it starts to close.

[–] [email protected] 1 points 2 months ago

Exactly.

I hadn't really visualized it at speed either - I can only imagine the turbulence then.