| 摘要 |
PURPOSE:To prevent over-rotation and ensure safe running by detecting the rotational frequency of an engine or a supercharger and disengaging an electromagnetic clutch between a crankshaft and an input shaft of the supercharger while opening a supercharging controlling valve when the rotational frequency is judged more than a predetermined value. CONSTITUTION:A supercharging pump 28 driven by the rotation of a crankshaft 25 through a clutch 32, belt 30, etc. is interposed between supercharging conduits 26, 27 bypassing an intake pipe 12. A supercharging controlling valve 35 is interposed between connections of the supercharging conduits 26, 27 with the intake pipe 12 and interlocked with a throttle valve 13 through a linkage 40. Also, an actuator 50 is provided which can open forcibly the supercharging controlling valve 35. And when the rotational frequency of an engine obtained from the output of a rotational frequency sensor 56 exceeds a predetermined value, the clutch 32 is disengaged through a control circuit 34 while an actuator 50 is operated to open the supercharging valve 35 and stop the supercharging operation. |
