| 摘要 |
<p>PURPOSE:To invariably obtain the optimum acceleration feeling by providing a detecting means detecting that the operation control action of an engine is in a full operation state and overshoot-controlling the supercharged pressure when this state is detected. CONSTITUTION:A relief valve 8 is provided in an exhaust bypass passage 7 bypassing the turbine rotor 5 of a supercharger, and the valve 8 is controlled by a diaphragm type actuator 9. The atmospheric pressure or the supercharged pressure can be selectively guided by a transfer control valve 13 into the upper and lower chambers 9d and 9c of the actuator 9, and the transfer control valve 13 is transferred by an electromagnetic actuator controlled via a control circuit 12. When the control circuit 12 detects that the engine operation is in a full acceleration state, the electromagnetic actuator 14 is excited to transfer the transfer control valve 13 to the broken line position, the supercharged pressure is guided into both chambers 9d and 9c to close the relief valve 8, and the supercharged pressure is overshoot-controlled.</p> |
