ELECTRONIC FUEL CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE

摘要

ELECTRONIC FUEL CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE A signal corresponding to an oxygen concentration in an exhaust gas of an internal combustion engine, as detected by an O2 sensor, is applied to a control logic circuit after analog conversion. A duty ratio of a pulse signal for keeping the optimum air-fuel ratio corresponding to the running state of the engine is calculated by use of the detection signal and in accordance with a program stored in a ROM in advance. The control pulse having the duty ratio is used for the switching control of a solenoid valve regulating the air-fuel ratio of the mixture generated by the carburettor.