| 摘要 |
PURPOSE:To maintain the air-fuel ratio of mixture gas substantially constant irrespective of the variation in the supercharged pressure by providing a control valve for leaking the internal pressure to the exterior such as a float chamber in a device for introducing supercharged pressure at the downstream side of a supercharger into the float chamber. CONSTITUTION:When the supercharged pressure of a supercharger 6 which is driven by a turbine 5 becomes maximum, bellows 20 in a control chamber 16 in a control valve 10, to which supercharged pressure is introduced through a communication passage 21 are contracted upwardly, and a valve body 18 closes a valve hole 12 through a diaphragm 15 and a valve rod 19. Accordingly, supercharged pressure is introduced through a passage 8 into a float chamber 7 as it is. In this state, pressure difference occurs corresonding to the pressure drop between the chamber 7 and a Venturi 4a in response to the pressure drop produced in a Venturi 4a, thereby injecting fuel from an injection pot 4b due to the pressure difference. On the other hand, when the supercharged pressure decreases and the opening of the valve 10 increases, the internal pressure in the chamber 7 decreases through a leakage passage 24, and the decrease in the pressure reduces the fuel injection amount. |
