Helically-shaped intake port of an internal combustion engine

Details Helically-shaped intake port of an internal combustion engine Helically-shaped intake port of an internal combustion engine

1983-05-02

1984-10-23

Lazarus, Ira S.

Internal-combustion engines

Valve

Valve head cooperates with manifold

123308, F02F 142

Patent

active

044781822

ABSTRACT:
An engine comprising an intake port which has a separating wall projecting downward from the upper wall of the intake port. The separating wall defines a helical portion, an inlet passage portion tangentially connected to the helical portion, and a bypass passage interconnecting the inlet passage portion 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 conical shaped groove is formed on the bottom wall of the intake port. The lower end of the rotary valve is located in the groove.

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