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

1983-05-18

1984-12-04

Lazarus, Ira S.

Internal-combustion engines

Valve

Valve head cooperates with manifold

123308, F02F 142

Patent

active

044857756

ABSTRACT:
An engine comprising an intake port which has a separating wall projecting downwardly 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 and the helical portion. The separating wall extends to near the side wall of the helical portion and defines a narrow passage portion therebetween. The width of the upper wall of the inlet passage portion is gradually reduced towards the narrow passage portion. A rotary valve is arranged in the bypass passage and is actuated by a vacuum-operated diaphragm apparatus. The rotary valve is opened when the amount of air fed into the cylinder of the engine is increased beyond a predetermined value.

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patent: 4411226 (1983-10-01), Okumura et al.
patent: 4438741 (1984-03-01), Okumura et al.

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