| 摘要 |
PROBLEM TO BE SOLVED: To solve such problems that, since a high-pressure pipe is laid from the upper center part of a cylinder head to a fuel injection pump on the side of a cylinder block, the length of the high-pressure pipe communicating the cylinder head with the fuel injection pump is increased, and not only the peripheral area of the cylinder head is complicated but also the displacement of timing such as delay of injection occurs, and a normal rotation cannot be provided or a pressure led to the fuel injection nozzle is lowered. SOLUTION: In the upper structure of an air-cooled engine 1, the high- pressure pipe 19 for communicating the fuel injection nozzle 30 with the fuel injection pump 12 is disposed in a space formed of a bonnet 7, a fuel tank 9, and the cylinder head 6.
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