| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel supply system capable of controlling generation of vapor in fuel and efficiently removing the generated vapor. SOLUTION: A plunger 12 forming a pressure chamber pressurizing fuel flowing in from a flow-in part 10a is slidably provided in a cylinder 10 provided with the flow-in part 10a fuel of a fuel tank 2 flows in, a discharge part 10b sending pressurized fuel to a fuel injection device, a collection part 10c surplus fuel returned from the fuel injection device flows in, and a return part 10d leading the returned surplus fuel to a fuel tank. A solenoid coil 13 exciting the plunger 12 is provided on an outer circumference of the cylinder 10. A fuel supply passage 14 making the flow-in part 10a communicate with the return part 10d and the cylinder 10 is formed in the outer circumference part of the cylinder 10.
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