LIQUEFIED GAS FUEL FEED DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a liquefied gas fuel device capable of easily detecting a leakage even if it occurs in a pipe at the downstream side of a fuel feed pipe and a delivery pipe and leaking no more of fuel to the outside.

SOLUTION: A pressure regulator 8 is attached to a downstream end of a return pipe 19 and is arranged in a fuel tank 2. When a difference of pressure of a fuel pressure of the delivery pipe 6 and a fuel pressure of the fuel tank becomes smaller than a predetermined value or reduction of the difference of pressure per a unit time becomes a predetermined value or higher, it is judged that the fuel pipe is damaged and a tank shut-off valve 14 and a delivery shut-off valve are closed. Therefore, even if the return pipe 19 or the like is damaged by an accident, prevention of the leakage of the fuel in the fuel tank 2 can be certainly enhanced.

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