| 摘要 |
PURPOSE:To reduce emission of harmful exhaust gas and prevent a mixture from becoming over rich when an engine is high loaded, by providing a valve, which opens only when the engine is partly loaded, in a fuel passage to a fuel nozzle so as to supply a rich mixture to the engine when it is partly loaded, in the mixture for the liquefied gas engine. CONSTITUTION:A Venturi 1 arranges in its fuel nozzle 2 an auxiliary fuel passage 7 communicating with a liquefied gas supply path 3 through a fuel metering part 6 and bypassing it. The auxiliary fuel passage 7 provides a jet 8 and an opening and closing valve 17, and the opening and closing valve 17, introducing the negative pressure in the downstream of a throttle valve 11 through an introducing passage 2 to a chamber 13 so as to attract a diaphragm 14 against a spring 16 because a high negative pressure is generated when an engine is partly loaded, supplied auxiliary fuel to the nozzle 2 by opening a valve 15. In this way, emission of harmful exhaust gas is decreased by supplying a rich mixture to the engine when it is partly loaded, while fuel is normally supplied to the engine when it is high loaded because the valve 15 is closed by a decrease of the negative pressure. |
