Independent runner intake manifold for a V-8 internal combustion

Details Independent runner intake manifold for a V-8 internal combustion Independent runner intake manifold for a V-8 internal combustion

1974-12-23

1976-01-13

Myhre, Charles J.

Internal-combustion engines

Multiple cylinder

123 52MV, F02B 7518

Patent

active

039318117

ABSTRACT:
The plenum of an independent runner manifold is oriented at an angle to the longitudinal center line of the manifold such that each carburetor throat of a four barrel carburetor sees the entire entrance of two adjacent runners of different runner pairs. Each of four runner pairs has two runners leading from the plenum to side-by-side inlet ports. The wall lengths within a runner are made at least nearly equal to each other. A sudden enlargement, in the form of a step, is provided proximate the entrance of each runner of a manifold to the ports of an engine along the outer wall thereof where mixture velocity is relatively low with respect to mixture velocity elsewhere in the same velocity profile. The enlargements control reverse mixture flow and increase the amount of mixture entering the engine's cylinders. It is believed that this increase in flow is partially due to a reduction or elimination of boundary layer separation in the inlet port. The geometry of the runners is such as to promote relatively high mixture velocity. Specifically, the cross-sectional area of each runner progressively diminishes downstream from the entrance to the runner at the manifold's plenum.

REFERENCES:
patent: 974992 (1910-11-01), Rice
patent: 2733695 (1956-02-01), Goodridge
patent: 2759462 (1956-08-01), Haltenberger
patent: 2882875 (1959-04-01), Kolbe
patent: 3014470 (1961-12-01), Burrell

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