Patent ID: 6910468

Claim:
A fuel supply apparatus using a low boiling point fuel, comprising: a pressure sensor detecting the fuel pressure of the low boiling point fuel in the fuel pipe leading the fuel from said fuel storing container to an engine; a temperature sensor detecting the fuel temperature of the low boiling point fuel in the fuel pipe leading the fuel from said fuel storing container to the engine; and a fuel flow rate adjusting apparatus for adjusting the fuel flow rate in said fuel pipe when the output signals from both sensors reaches a specified condition, wherein the fuel flow rate adjusting apparatus determines feeding pressure in the fuel storing container from an output of the temperature sensor, compares the feeding pressure in the fuel storing container with the fuel pressure in the fuel pipe and adjust the amount of fuel flowing through the fuel pipe so as to optimize the feeding pressure, and comparing the fuel pressure in the fuel storing container detected by the pressure sensor with a target pressure value Pft for estimating vapor phase volume in the fuel standing containers, and, based on the estimated result, makes a judgment whether fuel leakage is caused and, based on the judgment, adjusts amount of fuel flowing through the fuel pipe.