| 摘要 |
<p>In one embodiment of an engine (1) in which air-fuel ratio feedback control is performed based on output of an exhaust gas sensor (100) disposed in an exhaust path, when the engine (1) starts in an extremely low temperature state (e.g., -20 to -30°C), a heater (200) that heats a sensor element (110) of the exhaust gas sensor (100) is not powered immediately after the engine (1) starts, rather, power to the heater (200) is started when an engine coolant water temperature has reached a temperature near an air-fuel ratio feedback control starting water temperature.</p> |
