Method of controlling an oxygen concentration sensor

摘要

A method for controlling an oxygen concentration sensor in which the supply of a heater current to a heater element is started when the complete combustion of the engine is detected. The supply of a pump current to an oxygen pump element is started when an internal resistance of the heater element is determined to be in a predetermined range. The supply of the pump current is started when the temperature of the oxygen pump element and the sensor cell element becomes sufficiently high to prevent the pump current from flowing excessively, thereby preventing the generation of blackening phenomenon.