Engine control system

Details Engine control system Engine control system

1991-06-28

1993-11-02

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123698, F02D 4114, F02M 2508

Patent

active

052576132

ABSTRACT:
An engine control system corrects an air-fuel ratio of an air and fuel mixture during feedback control in a feedback region of engine operating conditions and during a learning control in a learning region of engine operating conditions. A purge region of engine operating conditions, in which purging of fuel vapor into the engine is conducted, is defined so as to have a portion overlapping with the learning control region. The air-fuel learning and the fuel vapor purging are conducted alternately. A specific region of engine operating conditions is defined in the purge region for higher flow rates of intake air. The control system undergoes the air-fuel learning prior to the fuel vapor purge when engine operating conditions are in this specific region.

REFERENCES:
patent: 4961412 (1990-10-01), Furuyama
patent: 4977881 (1990-12-01), Abe et al.
patent: 5048492 (1991-09-01), Davenport et al.
patent: 5048493 (1991-09-01), Orzel et al.
patent: 5070847 (1991-12-01), Akiyama et al.
patent: 5090388 (1992-02-01), Hamburg et al.

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