| 摘要 |
PURPOSE:To certainly prevent excessive revolution by operating an actuator for a throttle valve by the positive-pressure air supplied from a resonance pump operated by the engine vibration and compulsorily closing the throttle valve, when the engine is in excessive revolution. CONSTITUTION:A resonance pump 11 operated through vibration is installed onto an engine, and the positive-pressure air supplied from the pump 11 is supplied into a pressure converter 17 as the actuator for a throttle valve 2. When the engine revolves excessively, the pressure converter 17 which receives the positive pressure air supplied from the resonance pump 11 pushes the control lever 7 of the throttle valve 2, which is turned in the closing direction, and the amount of mixed gas is reduced to reduce the number of revolution. |
