| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel supply device capable of injecting DME fuel into a combustion chamber in a supercritical state.SOLUTION: A fuel supply device 1 comprises: a high-pressure fuel passage 6 for supplying fuel from a high-pressure pump 3 to an injector 5; a return fuel passage 7 for returning return fuel from the injector 5 and the high-pressure pump 3 to a fuel tank 2; and a heating passage (first heating passage 25, second heating passage 28) which is a part of the return fuel passage 7 and heats a part of the high-pressure fuel passage 6 with heat of the return fuel. With this, by the heat energy of the return fuel, the fuel in the high-pressure fuel passage 6 can be heated to a necessary temperature for injection in a supercritical state without preparing a heat source as a separate device or using a large-scale system. |
