Flow control device of a helically-shaped intake port
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United States of America Patent
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Aug 21, 1984
Grant Date -
N/A
app pub date -
Jun 23, 1982
filing date -
Jun 29, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
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. A rotary valve is arranged in the bypass passage and actuated by a vacuum operated diaphragm apparatus. The rotary valve is opened when the amount of air fed into the cylinder of an engine is increased beyond a predetermined value. A cooling water passage is arranged beneath and near the bypass passage.
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