| 摘要 |
<p>A control device for an exhaust gas sensor is provided with a first means for estimating the temperature of a sensor element according to the impedance of a solid electrolyte, and a second means for estimating the temperature of the sensor element according to the resistance of a heater. A first element temperature based on the impedance of the sensor element at a prescribed detection timing is detected with the first means, and a second element temperature based on the resistance of the heater of the sensor element at that prescribed detection timing is detected with the second means. The control device corrects the temperature of the sensor element estimated by the second means from the heater resistance, according to the difference between the first element temperature and the second element temperature.</p> |
