Patent ID: 9714913
Date: 2017-07-25
CPC Classifications: F02D,G01N

Claim:
1. A control device for an exhaust gas sensor configured to control the exhaust gas sensor disposed in an exhaust channel of an internal combustion engine, the exhaust gas sensor including: the control device programmed to: estimate, as a first element temperature, a temperature of the sensor element in accordance with impedance of the solid electrolyte in the absence of resistance of the heater in a temperature range in which the temperature of the sensor element is greater than a reference temperature; estimate, as a second element temperature, the temperature of the sensor element in accordance with resistance of the heater at least in the temperature range in which the temperature of the sensor element is less than or equal to the reference temperature; and correct the second element temperature of the sensor element that is estimated by the control device in the temperature range in which the temperature of the sensor element is less than or equal to the reference temperature, in accordance with a difference between the first element temperature at a predetermined detection timing, and the second element temperature that is estimated at a timing corresponding to the predetermined detection timing.