Internal combustion engine having auxiliary combustion chambers

Details Internal combustion engine having auxiliary combustion chambers Internal combustion engine having auxiliary combustion chambers

1974-05-06

1976-11-16

Myhre, Charles J.

Internal-combustion engines

Noncompression

123 32ST, 123 9015, F01L 134

Patent

active

039917258

ABSTRACT:
Improvements are made in a reciprocating-piston, four-stroke spark-ignition internal combustion engine of the type which has main and auxiliary combustion chambers and main and auxiliary intake valve associated respectively with the combustion chambers, wherein the auxiliary intake valve has a valve lift smaller than a valve lift of the main intake valve and wherein the duration of opening of the auxiliary intake valve is arranged to be shorter than that of the main intake valve for each of the intake strokes of the engine. The auxiliary intake stroke is preferably so operated as to start to open after the main intake valve has been opened and to fully close simultaneously as or before the main intake valve is fully closed. The improvements are intended to prevent escape of an air-fuel mixture from the auxiliary combustion chamber into the main combustion chamber during intake strokes of the engine so that the ratio between the volumes of the air-fuel mixtures in the two combustion chambers is maintained constant under varying operational conditions of the engine.

REFERENCES:
patent: 2011992 (1935-08-01), Aseltine
patent: 2110191 (1938-03-01), Bagnulo
patent: 2770224 (1956-11-01), Ericson
patent: 3234923 (1966-02-01), Fleck
patent: 3763834 (1973-10-01), Geiger
patent: R26603 (1969-06-01), Von Seggern

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