Internal-combustion engines – Noncompression
Patent
1975-02-10
1976-10-05
Myhre, Charles J.
Internal-combustion engines
Noncompression
123 32SA, F02B 1910
Patent
active
039838471
ABSTRACT:
A jet ignition engine, of the type in which lean mixtures in the main combustion chambers are ignited by flame jets formed by combustion of rich mixtures in adjacent small auxiliary precombustion or ignition chambers connected with the main chambers by restricted orifices, wherein the engine is provided with a main fuel system for supplying lean mixtures to the main chambers and a supplemental fuel injection system for adding fuel to the auxiliary prechambers to augment lean mixtures delivered from the main chambers and form the rich prechamber ignition charges. The simplified injection system injects fuel at low pressure during the piston exhaust strokes through timed injection valves and nozzles. Each fuel stream is directed to engage an extended spark plug electrode that forms an atomizing projection in the prechamber to break up the fuel stream, directing droplets to prechamber walls, formed by an insulated cup, for vaporization. Optionally, a constant injection period may be maintained for all operating conditions by relating the injection pressure, orifice size and timing to the range of throttle openings so as to maintain the prechamber air-fuel ratio within a range of from about 8:1 to 12:1 and the main chamber air-fuel ratio within a range of from about 16:1 to 26:1.
REFERENCES:
patent: 1616157 (1927-02-01), Werner
patent: 2758576 (1956-08-01), Schlamann
patent: 3661125 (1972-05-01), Stumpfig
patent: 3824965 (1974-07-01), Clawson
patent: 3878826 (1975-04-01), Date
Blevins Jerry R.
Harned John L.
Maksymiuk, Jr. Stanley
Wyczalek Floyd A.
Cox Ronald B.
General Motors Corporation
Myhre Charles J.
Outland Robert J.
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