| 摘要 |
PURPOSE: To maintain fuel in a delivery pipe at the high temperature and the high pressure in high-temperature soaking after an internal combustion engine is stopped, so as to improve re-startability after high-temperature soaking, by arranging a check valve for preventing fuel supplied to the delivery pipe from flowing back to the tank. CONSTITUTION: Fuel in a tank 1 is filtered by a suction filter 11, and sucked and discharged by a pump 2, and then filtered by a fuel filter 3. A pressure regulator 6 supplies only required fuel out of filtered fuel to a supply passage 12 and returns unrequired fuel to the tank 1. The required fuel is supplied to the delivery pipe 4 of an engine part 10 through a check valve 8 and then injected from fuel injection valves 5. At this time, the check valve 8 is opened and closed according to the differential pressure of fuel, and closed according to the stop of the engine 10. Therefore, fuel pressure on the rear part of the check valve 8 is raised to the set pressure or more of the pressure regulator 6 in restarting of the engine 10.
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