| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a conventional device induces an engine stall due to an increase of a generation amount of fuel vapor accompanied by a rise of a temperature of a pump housing and a rise of a fuel temperature.SOLUTION: A communication hole 29 of a supply pump 1 is formed in a position shifted to an engine side end face of a pump housing 5, that is, two adjacent first and second gallery chambers 14, 24 are connected to each other at an engine side, and thereby the pump housing 5 is cooled by liquefied gas fuel flowing in the communication hole 29 even if the pump housing 5 receives heat from the engine E. Furthermore, a fuel outlet 7 and an overflow valve 8 of the supply pump 1 are arranged in a position shifted to an anti-engine side end face of the housing 5, surplus fuel is returned to a fuel tank side from the overflow valve 8 by valve-opening the overflow valve 8, and thereby a rise of a temperature of the surplus fuel collected to the fuel tank side from the overflow valve 8 can be suppressed. |
