| 摘要 |
PROBLEM TO BE SOLVED: To reduce the discharge amount of an uncombusted fuel by promoting vaporization of the fuel adhered to an inside wall face of an intake port to be used for combustion. SOLUTION: The structure of the intake port 5 of an engine 1 is provided with a fuel injection valve 4. A plurality of recessed parts 7 which become gradually smaller toward the downstream side of the intake air flow is provided on the inner wall face of the intake port 5 between a mounting position of the fuel injection valve 4 and an inlet of a combustion chamber 6. COPYRIGHT: (C)2005,JPO&NCIPI
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