| 摘要 |
A working angle (lift amount) of an intake valve is set to a predetermined first set value A 1 during a period from when starting of the engine is initiated until when the engine is shifted to an initial combustion state, and the working angle is changed to a second set value A 2 (=previous value (initial value is A 1 )+alpha) that is larger than the first set value A 1 during a period from when the engine is shifted to the initial combustion state until when the engine is shifted to a perfect combustion state. When an engine rotational speed becomes equal to or higher than a reference rotational speed n 1 , it is determined that the engine has been shifted to the perfect combustion state, after which an engine starting routine ends.
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