| 摘要 |
PROBLEM TO BE SOLVED: To efficiently heat fuel of an internal combustion engine.SOLUTION: A fuel heating device 15 is provided in the middle of a fuel passage 13 connected between a fuel injection valve 14 and a fuel pump 12, and the fuel heating device 15 includes: a columnar heating part 16 which heats fuel in the fuel passage 13; and a cylindrical guide part 17 arranged in the surroundings of the heating part 16. The heating part 16 is arranged so as to extend approximately in the horizontal direction in the fuel passage 13, and the guide part 17 is arranged so as to surround the whole circumference of the heating part 16 at predetermined distance from the heating part 16. A plurality of circular through holes 18 are formed on at least each of an upper surface side and a lower surface side of the guide part 17. Thus, when the fuel is heated by the heating part 16, the fuel can be promptly transited to a nucleate boiling state, it becomes possible to maintain the fuel at the nucleate boiling state (or from a later stage of the nucleate boiling state to a former stage of a transition boiling state) for a long time, and the fuel can be efficiently heated. |
