Method of operating an internal combustion engine

Details Method of operating an internal combustion engine Method of operating an internal combustion engine

1976-01-22

1978-06-20

Cox, Ronald B.

Internal-combustion engines

Combined devices

Generating plants

123 75B, 123 32L, F02B 300

Patent

active

040955656

ABSTRACT:
A method of operating a torch ignition type internal combustion engine having a main combustion chamber and a trap chamber always communicated therewith through first and second apertures provided in the trap chamber has the steps of supplying a charge of a lean air-fuel mixture into the main combustion chamber through an intake port and introducing another charge of a rich air-fuel mixture through the first aperture into the trap chamber. The rich air-fuel mixture charge is substituted in the trap chamber for residual gases produced therein during the preceding combustion stroke to discharge the residual gases through the second aperture whereby the trap chamber is scavenged. A substantial part of the rich air-fuel mixture charge is retained in the trap chamber during a compression stroke and then ignited to produce therein a combustion flame which is then caused to spurt as torch jets through the first and second apertures into the main combustion chamber to ignite and burn the lean air-fuel mixture charge therein for thereby producing power in the main combustion chamber. The lean air-fuel mixture charge is too lean to be ignitable by spark-ignition while the rich air-fuel mixture charge is relatively rich. The mean air-fuel ratio of the total of the rich and lean air-fuel mixture charges is much leaner than the air-fuel ratio for conventional spark-ignition type internal combustion engines, whereby the invention greatly reduces the harmful components of engine exhaust gas.

REFERENCES:
patent: 2435659 (1948-02-01), Summers
patent: 3230939 (1966-01-01), Goossak
patent: 3270721 (1966-09-01), Hideg et al.
patent: 3283751 (1966-11-01), Goossak et al.
patent: 3926158 (1975-12-01), Dolza

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