Lerner, David, Littenberg, Krumholz & Mentlik, LLP
Apparatus for controlling internal combustion engine
An apparatus for controlling an internal combustion engine executes air-fuel ratio feedback control based on a detection result of an exhaust gas sensor and when the engine is shut down, stops energization of a heater of the exhaust gas sensor at a predetermined timing after shutdown of the engine, heater control of the exhaust gas sensor is executed, which is suitable for a case in which shutdown time of the engine is set long, and thus the exhaust gas sensor is protected from thermal shock. The control apparatus sets timing for stopping energization of a heater of an exhaust gas sensor after shutdown of the engine, to a point in time when a predetermined time set based on outside air temperature has elapsed, or a point in time when cooling water temperature of the engine has dropped to a predetermined temperature.
Suzuki Motor Corporation
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F02N B60W F02D B60W F02D B60K B60Y F02D F02D B60W Y02T F02D
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Kenji Teruaki
Sato Watanabe