| 摘要 |
An electronic control system for controlling the air-fuel ratio for an internal combustion engine comprising an oxygen sensor for detecting the concentration of oxygen in exhaust gases of the engine, an on-off type electromagnetic valve for correcting the air-fuel ratio of the air-fuel mixture supplied by an air-fuel mixture supply device, a comparator for evaluating the output signal of the oxygen sensor, an integrating and a proportional circuit connected to the comparator, and a driving circuit for producing pulses for driving the on-off type electromagnetic valve from output signals of the integrating circuit and proportional circuits for controlling the air-fuel ratio to a value substantially equal to the stoichiometric air-fuel ratio. A potentiometer-type transducer converts the operation of the throttle valve to an electric output, and a differentiating circuit differentiates the output of the transducer. The constants of the integrating and proportional circuits are increased by the differentiation signal from the differentiating circuit upon acceleration and deceleration of the engine.
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