Air-fuel ratio control system for automotive engine with compensation circuit for deterioration of feedback signal generator

摘要

In a control system installed on a motor vehicle and constituted of an oxygen concentration sensor and a control device for regulating the fuel supply rate to apparatus for preparing an air-fuel mixture on the basis of a signal from the sensor, a compensation circuit is inserted between the sensor and the control device, a resistance in which circuit varies as the engine is run every predetermined hours or the vehicle travels every predetermined distance.