| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform good restart with a state where a fuel temperature is high, to provide good operating conditions of an engine without increase in power consumption of a fuel pump or temperature rise of fuel in a tank even after high-temperature restart, and to prevent unnecessary pressure rise of sealed fuel and thereby to prevent breakage of components. <P>SOLUTION: In a liquid fuel supply system, a check valve 7 is installed to a supply conduit 4 of liquid fuel to prevent a back flow of the liquid fuel from an injection valve 8 to a fuel tank 2, and a closing means 17 is installed to a return conduit 9 to close the downstream of a portion in which back pressure is introduced of a pressure regulator 10 in stopping an engine 21. The return conduit 9 is set to be kept closed in a temperature region where the liquid fuel in the supply conduit 4 may be vaporized with regulating pressure of the pressure regulator 10 after the engine 21 is started, and is set to be opened when the liquid fuel is dropped to a temperature where the liquid fuel is not vaporized. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
