Intake manifold for engine

Details Intake manifold for engine Intake manifold for engine

1978-07-14

1980-05-06

Lazarus, Ronald H.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123122AC, 123 32ST, 123 32SP, F02M 3100

Patent

active

042011680

ABSTRACT:
An intake manifold for a multi-cylinder internal combustion engine contains a first distribution cavity and a plurality of passages for delivering a relatively lean air-fuel mixture to the main combustion chambers of the engine. This first cavity is fed from a carburetor through a main primary opening and a main secondary opening. The manifold also has a second distribution cavity and passages for delivering a relatively rich air-fuel mixture to auxiliary combustion chambers of the engine. This second cavity is fed from another carburetor through an auxiliary opening. A water jacket employs hot water from the engine cooling system to heat both of the distribution cavities, but the construction is such as to avoid heating lean air-fuel mixture introduced into the manifold through the main secondary opening. The water jacket lies below the distribution cavities. Two spaced inlets for hot water are provided at relatively high elevations and one outlet is provided at a lower elevation, to avoid formation of unwanted air pockets.

REFERENCES:
patent: 3850153 (1974-11-01), Sigwald
patent: 3908620 (1975-09-01), Maekawa
patent: 3972324 (1976-08-01), Marsee

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