Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1976-04-05
1978-08-01
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Methods
60284, 60285, F02B 7510
Patent
active
041034864
ABSTRACT:
In a spark-ignited internal combustion engine having a plurality of combustion chambers, at least one combustion chamber is intentionally caused to misfire either periodically or continuously to increase the amount of unburned fuel in the exhaust gas when the temperature in the thermal reactor drops excessively during, e.g., idling of the engine. An ignition system for performing the method has a supplementary ignition primary circuit which is normally disconnected from the ignition coil primary, but causes the secondary voltage either to become zero periodically or to lower when connected with the ignition coil primary. Alternatively, the ignition timing is retarded from a normal timing in a portion of the combustion chambers to raise the exhaust gas temperature. An ignition system for the ignition timing retardation has a supplementary circuit which prevents certain times of the breaks in the primary circuit from producing sparks in the intended combustion chambers and supplies a high voltage pulse to each of these combustion chambers with a predetermined time delay from each of the breaks which are made ineffectual.
REFERENCES:
patent: 2937490 (1960-05-01), Calvert
patent: 3896913 (1975-07-01), Maruoka
patent: 4023359 (1977-05-01), Masaki
Hata Yoshitaka
Ikeura Kenji
Masaki Kenji
Hart Douglas
Nissan Motor Company Ltd.
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