| 摘要 |
PROBLEM TO BE SOLVED: To enable a negative pressure for closing a valve of a waste gate valve 31 to be preferentially secured by more strictly setting an idle reduction permission condition in such a case that a negative pressure for closing the waste gate valve 31 is predicted to be required at subsequent restart when an idle reduction condition is met.SOLUTION: In a control device 100, a negative pressure source for generating a negative pressure for closing a waste gate valve 31 of supercharger 20 is a vacuum pump 32 which is driven by an engine 1. The device includes a determination part which permits idle reduction on a condition that the negative pressure of the negative pressure source is higher than or equal to a predetermined threshold when the idle reduction condition is met and a setup part which, prior to determination by this determination part, sets up a higher threshold when the negative pressure for closing the waste gate valve 31 is predicted to be required at subsequent engine restart than when no negative pressure is predicted to be required. |
