Air-fuel ratio control system for automotive engines

Details Air-fuel ratio control system for automotive engines Air-fuel ratio control system for automotive engines

1986-12-04

1988-08-16

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

F02M 2508

Patent

active

047636343

ABSTRACT:
An air-fuel ratio control system for an engine has integrating means for integrating an error signal which is the difference between a reference voltage and an output voltage of an O.sub.2 -sensor and for producing an integration signal. In response to the integration signal, the air-fuel ratio is controlled to a desired value. When fuel vapor in a canister of the engine is purged, an integration constant of the integrating means is increased for a predetermined time in order to allow a deviation of the air-fuel ratio to quickly converge.

REFERENCES:
patent: 3831564 (1974-08-01), Schmidt et al.
patent: 4290400 (1981-09-01), Pomerantz
patent: 4300505 (1981-11-01), Takada et al.
patent: 4467769 (1984-08-01), Matsumura
patent: 4641623 (1987-02-01), Hamburg
patent: 4646702 (1987-03-01), Matsubara et al.

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