Flow control device of a helically-shaped intake port

Internal-combustion engines – Valve – Valve head cooperates with manifold

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123306, F02B 3100

Patent

active

044677499

ABSTRACT:
A helically-shaped intake port comprising a helical portion formed around an intake valve, and a substantially straight inlet passage portion tangentially connected to the helical portion. A bypass passage is branched off from the inlet passage portion and connected to the helical portion. The slide valve, actuated by lubricating oil, is arranged in the bypass passage. The slide valve is opened when the amount of air fed into the cylinder of an engine is increased beyond a predetermined value.

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patent: 4257384 (1981-03-01), Matsumoto
patent: 4312309 (1982-01-01), Nakanish et al.
patent: 4411226 (1983-10-01), Okumura et al.

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