| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel supply system enabling improvement of vaporization accuracy of vaporized fuel supplied from a vaporization chamber to an intake passage and improvement of work efficiency for generating the vaporized fuel.SOLUTION: In a fuel supply system 2-5 for supplying vaporized fuel to an intake passage 29 of an internal combustion engine 10, liquid fuel injected from a sub injector 38 is vaporized in a vaporization chamber 41 and is supplied to the intake passage 29. At this time, remaining liquid fuel that is not vaporized in the vaporization chamber 41 is discharged to a fuel tank chamber 31 through a return passage 66. Liquid level detection means 80 determines a gas-liquid state where fluid in the return passage 66 is gas or liquid at a predetermined first height and at a second height on a side of a lower position than that of the first height. A relief valve 69 communicates or blocks the return passage 66 in accordance with a command from an ECU 100. On the basis of detection information from the liquid level detection means 80, the liquid fuel remaining in the vaporization chamber 41 can be efficiently discharged. |
