Cars - For Car Enthusiasts

3975 readers

65 users here now

About Community

c/Cars is the largest automotive enthusiast community on Lemmy and the fediverse. We're your central hub for vehicle-related discussion, industry news, reviews, projects, DIY guides, advice, stories, and more.

Rules

Stay respectful to the community, hold civil discussions, even when others hold opinions that may differ from yours.

This is not an NSFW community, and any such content will not be tolerated.

Policy, not politics! Policy discussions revolve around the concept; political discussions revolve around the individual, party, association, etc. We only allow POLICY discussions and political discussions should go to c/politics.

Must be related to cars, anything that does not have connection to cars will be considered spam/irrelevant and is subject to removal.

founded 2 years ago

MODERATORS

BallShapedMan

RightHandOfIkaros

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

12 comments fedilink hide all child comments

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?

you are viewing a single comment's thread
view the rest of the comments

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

Exactly.

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