| 摘要 |
PURPOSE:To synchronize operation of a turbine with rotation of an engine at the time of rapid acceleration of the engine, by opening a throttle valve a little by a valve opening mechanism in case that the engine is decelerated at the time of medium- or high-speed operation, and turning the turbine by exhaust gas even at the time of decelerating the engine. CONSTITUTION:In high-speed region of engine operation, solenoids 21, 22 are both operated by a signal given from an ignition timing control unit 23, and a second chamber 17c and a third chamber 17d of a throttle opener 17 are communicated with an intake port of an engine 3. When the pressure at the intake port becomes lower than the atmospheric pressure at the time of decelerating the engine, diaphragms 18, 19 are both pulled upward and an upward movement restricting pin 20 of the diaphragm 19 is also moved upward, so that the diaphragm 18 is moved to an upper position that at the time of medium-speed operation of the engine. Resultantly, a rod 16 is further moved upward, and a link lever 14 is turned a large angle in the clockwise direction. Therefore, movement of a throttle lever 13 is restricted at the time of deceleration and the throttle valve is opened to a larger angle that at the time of medium-speed operation of the engine. |
