| 摘要 |
PURPOSE:To reduce an offensive odor of combustion gas and always enable a smooth ignition by a method wherein a fuel gas return circuit from the nozzle to the fuel supplying part is arranged. CONSTITUTION:A return circuit 10 for fuel gas is arranged from the nozzle part 6 to the oil pan 2 at the fuel supplying part. This return circuit 10 is composed of the first return pipe 11, a receiving tank 12 for accepting the fuel from the first return pipe 11, the second return pipe 13 arranged to return the fuel from the receiving tank 12 to the oil pan 2, and the vacuum pump 14 acting as a suction means. Above the first return pipe 11 is arranged a normally-closed solenoid valve 15 and the lower part of the first return pipe 11 is of a bent cooling part 16. Said vacuum pump 14 performs to suck the fuel gas from the nozzle part 6 to the first return pipe 11. Thereby, it is possible to prevent the generation of the offensive odor of fuel gas. |
