| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust valve control device for lowering the output of an engine when estimating that an exhaust valve is frozen and firmly fixed, in accordance with outside air temperature and cooling water temperature information. SOLUTION: An exhaust valve device 5 is constructed to resiliently loading the exhaust valve 12 to be always opened with a torsion coil spring 17 and to drive the exhaust valve 12 be closed with one wire 15 connected thereto and pulled by a motor 25. An exhaust valve control part 35 in an ECU 30 as a control part is set to close the exhaust valve 12 at stopping the engine. An ignition timing calculating part 32 in the ECU 30 determines that the exhaust valve 12 is frozen in the closed condition when a cooling water temperature A detected by a water temperature sensor 40 and an outside air temperature B detected by an outside air temperature sensor 41 are each smaller than a predetermined value and a A-B value is smaller than a freezing determination value at restarting the engine, and retards an ignition timing to lower the output of the engine when the engine is set in a predetermined high load condition in this state. COPYRIGHT: (C)2009,JPO&INPIT
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