| 摘要 |
<p>PURPOSE:To prevent the occurrence of surging by introducing pressure downstream of a throttle valve to an actuator for operating an exhaust bypass valve to operate the exhaust bypass valve for reducing pressure at an inlet of a turbine and pressure at an outlet of a compressor when vehicle speed is decelerated and the throttle valve is opened. CONSTITUTION:In quick deceleration when a throttle valve 6 is fully closed, an intake manifold 7 downstream of said valve 6 is given negative pressure by the suction of a piston of an engine. Since this negative pressure is immediately sent to a fourth pressure chamber 33 and later sent to a third pressure chamber 34 for introducing intake negative pressure through a delay valve 35, large differential pressure is generated between the third pressure chamber 34 having remaining supercharging pressure and the fourth pressure chamber 33 to which the negative pressure is immediately sent. A second diaphragm 32 is lowered by the differential pressure and a rod 28 integral with a first diaphragm 21 is lowered by a second rod 37 integral with the second diaphragm to open an exhaust bypass valve 14 through a lever 19.</p> |
