| 摘要 |
PROBLEM TO BE SOLVED: To raise element temperature of an exhaust gas sensor to activated temperature in engine automatic start or at an early stage after automatic start while effectively reducing heater electric power consumption of the exhaust gas sensor during idling stop (automatic stop) of an engine.SOLUTION: In a heater controlling device for the exhaust gas sensor, present vehicle position and idling stop time in a time band are predicted based on information from a navigation device 32 and learning data of actual idling stop time when the engine 11 is automatically stopped. Heater cut control stopping electricity supply to a heater 26 is executed right after automatic stop of the engine 11, and element temperature of the exhaust gas sensor 25 is appropriately raised within idling stop time (before automatic stop of the engine 11) by executing element temperature raising control gradually raising target element temperature with predicted idling stop time taken into account when prescribed time (minimum value of idling stop time) elapses after automatic stop of the engine 11. |
