Air-fuel ratio control system for internal combustion engines

Details Air-fuel ratio control system for internal combustion engines Air-fuel ratio control system for internal combustion engines

1992-08-26

1993-06-22

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123681, 123687, 123 9016, F02D 4116

Patent

active

052209040

ABSTRACT:
An air-fuel ratio control system for an internal combustion engine, which detects the actual air-fuel ratio of a mixture supplied to the engine, detects operating conditions of the engine, calculates a desired air-fuel ratio based on the detected operating conditions of the engine, and calculates an air-fuel ratio correction value applied for feedback-controlling the actual air-fuel ratio to the calculated desired air-fuel ratio. A change rate at which the air-fuel ratio correction value is to be changed, is set such that when a change has occurred in the operating mode of the engine, the change rate is set to and held at a smaller value than a value assumed when no change has occurred in the operating mode, over a predetermined time period from the time the change occurred.

REFERENCES:
patent: 4509489 (1985-06-01), Hasegawa et al.
patent: 4895122 (1990-01-01), Noguchi et al.
patent: 4938187 (1990-07-01), Seki
patent: 4960083 (1990-10-01), Seki et al.
patent: 5033440 (1991-07-01), Kumagai et al.
patent: 5056491 (1991-10-01), Tsukamoto

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