| 摘要 |
PROBLEM TO BE SOLVED: To allow the use of an exhaust sensor at an early stage after the start of an internal combustion engine while preventing a sensor element from being wetted due to dew condensation water.SOLUTION: In a control device for an exhaust gas sensor, operation stop of an internal combustion engine is predicted during its operation, and when the operation stop of the internal combustion engine is predicted, power supply is stopped to a heater of the exhaust gas sensor. Moreover, when the internal combustion engine is restarted after power supply to the heater is stopped and the operation of the internal combustion engine is stopped, the temperature of the heater is detected or estimated. Before a temperature of the heater that has been detected or estimated exceeds a reference temperature, the power supply to the heater is prohibited at the start of the internal combustion engine. |
