Apparatus for calculating temperature of conductive carrier of catalyst converter

A catalyst temperature calculating apparatus applied for conductive carrier of a catalyst in catalysts for cleaning an exhaust emission out of an internal combustion engine, the conductive carrier heating up when energized, the catalyst temperature calculating apparatus comprising:

• a temperature estimating unit configured to estimate, as a learning temperature, the temperature of the conductive carrier during a deenergization period of the conductive carrier being deenergized based on a physical parameter different from a resistance of the conductive carrier;
• a resistance obtaining unit configured to energize, when the estimation is carried out by the temperature estimating unit, the conductive carrier to obtain an instantaneous value of resistance of the conductive carrier at the moment the estimate is carried out as a learning resistance;
• and
• a catalyst temperature calculating unit configured to detect a value of the resistance of the conductive carrier during the conductive carrier being energized to heat up, and calculate a value of the temperature of the conductive carrier upon the conductive carrier being energized based on:
• the detected value, the learning temperature, and the learning resistance.