| 摘要 |
PURPOSE:To more exactly indicate the state of turbo-operation, through a simple mechanism, by providing a unit which shows that the pressure of an intake passage is not lower than a prescribed level while a detector is detecting that a throttle valve is not below a prescribed degree of opening. CONSTITUTION:A pressure detector 12 is connected in series with a battery 20, a fuse 2, a key switch 24 and an indication unit 18. Normally-closed conatacts 26 for breaking the series circuit by the turn-on signal of an opening degree detector 14 for a throttle valve are connected in series with the pressure detector 12. The opening degree detector 14 is turned off when the throttle valve is opened. Even if the pressure of a surge tank 6 rises, the indication unit 18 is not lit provided that the normally-closed contacts 26 are opened, namely, the opening degree detector 14 is turned on. The indication unit 18 is thus put out in a very simple manner at the same time when the throttle valve is closed at the shift from acceleration to deceleration, to exactly indicate that an engine is not in the state of turbo-operation. |
