| 摘要 |
When engine shutdown conditions are satisfied while an engine 1 is running, a controller 10 automatically shuts down the engine 1 (idling stop state). When the engine 1 is automatically shut down and engine restart conditions are satisfied, the engine 1 is driven by a motor 2 and the engine 1 is restarted. At this time it is determined that the vehicle is in a deterioration state when the increase rate of the rotation speed of the engine 1 after starting driving the engine 1 with the motor 2 is low. Thereafter idling stop is prohibited. Furthermore when it is determined that the vehicle is on an up-slope, determination of deterioration state is not performed. The engine 1 is driven by the motor 2 and the engine 1 is immediately restarted.
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