Method and apparatus using proportional residual gas storage to

Details Method and apparatus using proportional residual gas storage to Method and apparatus using proportional residual gas storage to

1973-10-11

1976-01-20

Burns, Wendell E.

Internal-combustion engines

Noncompression

123 75B, 123 32SA, 123191SP, F02B 1910, F02B 1916

Patent

active

039331342

ABSTRACT:
Reduction of NO.sub.x emissions from a four-cycle stratified charge internal combustion piston engine is accomplished by (a) spark ignition of a rich mixture in a first chamber containing residual exhaust gas, followed by (b) torch ignition of rich mixture in a second chamber under turbulent conditions, causing (c) torch ignition of a stratified charge in a lean mixture in the main combustion chamber. The result is a reduction in peak temperature in the combustion process, with consequent reduction in NO.sub.x emissions in the engine exhaust gases. Exhaust gas is not recirculated. Said first chamber, which contains residual gas from the previous combustion cycle, contains the spark gap between spark plug electrodes and the spark gap is located near a restricted connection between the first and second chambers and remote from a closed end of the first chamber. Means are provided for changing the volume of said first chamber while the engine is operating, in accordance with variations in load on the engine.

REFERENCES:
patent: 820285 (1906-05-01), Cross
patent: 1616157 (1927-02-01), Werner
patent: 2422610 (1947-06-01), Bagnulo
patent: 2700963 (1955-02-01), Crawford
patent: 2808037 (1957-10-01), Von Seggern
patent: 3830205 (1974-08-01), Date

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