CONTROL APPARATUS AND METHOD FOR AIR-FUEL RATIO SENSOR

摘要

The ECU executes a program that includes the steps of: calculating the temperature Texp of the wall surface of the exhaust port and the temperature Tsen of the wall surface of the inner cover covering the zirconia element of the A/F sensor (S110); heating the zirconia element by the heater (S130) when at least one of the condition that the temperature Texp is equal to or higher than the first threshold and the condition that the temperature Tsen is equal to or higher than the second threshold is in effect (S120: YES); and prohibiting the heating of the zirconia element by the heater (S140) when the temperature Texp is lower than the first threshold and the temperature Tsen is lower than the second threshold (S120: NO).