| 摘要 |
an intake pipe injection type engine, in which even if the air flow is generated in the intake pipe, the fuel is prevented from adhering to the inner wall of the intake pipe to aim at the decrease of the amount of the hydrocarbon exhaust, thereby the response of the fuel supply of the demanded air fuel ratio is improved. In an intake pipe injection type engine, in which the fuel injection valve is installed in the intake pipe, and the fuel is injected into the intake pipe, the fuel injection valve injects a main spray of which the spray angle is wide and the spray penetration is weak, and a lead spray of which the spray angle is narrow and the spray penetration is strong.
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