| 摘要 |
PURPOSE:To improve the follow-up properties of fuel gas to supply good mixed gas to an engine by providing a buffer comprising two chambers downstream from pressure controls and by applying the positive pressure of a venturi to the fuel pressure via a diaphragm. CONSTITUTION:Air flowing from an air cleaner 1 into an intake manifold 2 passes through a venturi 4 like a pulse to generate negative pressure. Moreover, the positive pressure of the venturi 4 is fed from a positive pressure hole 25 into the positive pressure chamber 24 of a fuel buffer 21, and is applied to the gas fuel in a negative pressure chamber 23 via a diaphragm 22, permitting an amount of gas fuel determined by the differential pressure of the venturi 4 to be discharged from the fuel nozzle of the venturi 4. And, even with no differential pressure of the venturi 4, pressure within the negative pressure chamber 23 slightly becomes negative by the influence of the diaphragm 22 to cause the gas fuel to continuously flow from pressure controls into the negative pressure chamber 23. |
