Air-fuel ratio control method for internal combustion engines

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

1991-10-02

1992-09-08

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02D 4112, F02D 4114

Patent

active

051449340

ABSTRACT:
An air-fuel ratio control method for an internal combustion engine, in which the air-fuel ratio of a mixture supplied to the engine is feedback-controlled to a desired air-fuel ratio in response to output from an exhaust gas ingredient concentration sensor. When the engine is in a predetermined decelerating condition, fuel supply to the engine is cut off. The rate of correction of the air-fuel ratio of the mixture by the feedback control is set to a larger value before a predetermined time period elapses after the engine shifted from the predetermined decelerating condition to another operating condition, than values to be set after the predetermined time period has elapsed.

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patent: 4723521 (1988-02-01), Mieno et al.
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patent: 4953513 (1990-09-01), Sasaki et al.
patent: 4958612 (1990-09-01), Kato et al.
patent: 4981122 (1991-01-01), Osawa et al.

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