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Latest comment: 6 days ago1 comment1 person in discussion
how is the flap "opened during scavenging to increase air flow"? That happens multiple times per second per cylinder, and there is always at least one cylinder in the scavenging phase while the engine is turning. So how can that possibly work? It would need to be a super fast acting flap that can open and close at half the engine speed and is synchronized to the engine RPM just to do that for one cylinder, and it's impossible with multiple cylinders unless each cylinder has its own dedicated intake and flap.
Maybe that is the case but if so the rest of the article does a pretty poor job of explaining it. It sounds like a flap in the intake that operates along the lines of a variable length intake, it opens at high RPM and closes at low for more efficiency. If it's actually a super fast acting flap that runs at the actual cylinder speed and is flapping away fifty times a second at 6,000rpm, that might bear a little more explanation. Idumea47b (talk) 00:25, 29 September 2026 (UTC)Reply
