Air-fuel ratio control system

Details Air-fuel ratio control system Air-fuel ratio control system

1981-10-05

1985-02-12

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

F02M 724

Patent

active

044984413

ABSTRACT:
An air-fuel ratio control system for an internal combustion engine having an emission control system with a three-way catalytic converter for controlling the air-fuel ratio in accordance with the operation of the engine. A throttle sensor for detecting acceleration of the engine and a predetermined voltage supply device are provided. A feedback control circuit is provided for controlling the air-fuel ratio to the stoichiometric air-fuel ratio in a normal operating condition and for stopping the control operation when the acceleration of the engine is detected by the throttle sensor. A first switch is provided to be actuated by the output of the throttle sensor to connect the output of the predetermined voltage supply with the input of the feedback control circuit when acceleration is detected. A second switch is provided to be actuated by the output of the throttle sensor to render the feedback control circuit inoperative as a feedback controller, whereby the air-fuel ratio is controlled by the output of the predetermined voltage supply.

REFERENCES:
patent: 4089313 (1978-05-01), Asano et al.
patent: 4142482 (1979-03-01), Asano et al.
patent: 4144847 (1979-03-01), Hosaka
patent: 4187812 (1980-02-01), Hosaka et al.

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