Method and system for controlling the mixture air-to-fuel ratio

Details Method and system for controlling the mixture air-to-fuel ratio Method and system for controlling the mixture air-to-fuel ratio

1976-05-27

1978-09-05

Feinberg, Samuel

Internal-combustion engines

Noncompression

123119EC, F02B 300

Patent

active

041111621

ABSTRACT:
A closed loop air-to-fuel ratio control system having an oxygen responsive sensor and a feedback circuit is disclosed. The sensor is disposed in an engine exhaust passage to produce a voltage indicative of the oxygen concentration in the exhaust gas. This voltage is integrated in the feedback circuit to cause the mixture air-to-fuel ratio to be corrected in response thereto. The integration is controlled by the integration controller to shift the mixture air-to-fuel ratio to the one other than the stoichiometric ratio. This integration controller can be made responsive to specific engine operating conditions such as throttle valve movement.

REFERENCES:
patent: 3759232 (1973-09-01), Wahl et al.
patent: 3782347 (1974-01-01), Schmidt et al.
patent: 3831564 (1974-08-01), Schmidt et al.
patent: 3874171 (1975-04-01), Schmidt et al.

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