Engine cold startup controller

Details Engine cold startup controller Engine cold startup controller

1996-10-04

1997-12-16

Argenbright, Tony M.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

123422, 123424, F02P 515

Patent

active

056973403

ABSTRACT:
A fuel supply amount to a spark ignition engine is increased and an ignition timing of an air-fuel mixture is retarded during cold startup. At the same time, it is determined whether or not the air-fuel ratio of the air-fuel mixture is richer than a predetermined level, and retardation of the ignition timing is prohibited when it is richer than this predetermined level. In this way, retardation of ignition timing is prohibited when the air-fuel ratio is very rich immediately after startup. Combustion immediately after startup is therefore stable, and the discharge amount of HC is effectively reduced.

REFERENCES:
patent: 4351297 (1982-09-01), Suematsu
patent: 4790280 (1988-12-01), Umehara et al.
patent: 5535586 (1996-07-01), Ohta et al.
patent: 5540202 (1996-07-01), Cullen et al.

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