| 摘要 |
PROBLEM TO BE SOLVED: To preferably resolve a problem that fuel vapor entering an injector disturbs a fuel injection rate in a fuel supply system for supplying fuel to a cylinder of an internal combustion engine.SOLUTION: The fuel supply system for supplying fuel to the injector E1 from a fuel tank 1 via a fuel feeding pipe 2 includes: a return passage 4 for connecting the fuel feeding pipe or injector to the fuel tank; and an on-off valve 5 provided on the return passage and opening a valve based on the condition that a parameter suggesting the temperature of fuel inside the fuel feeding pipe or injector is higher than a predetermined value. |
