| 摘要 |
PURPOSE:To improve the operationability or fuel consumption while to prevent deterioration of emission by setting the completion timing of fuel injection within intake stroke in the rear of top dead center of respective cylinder under acceleration while in front of intake stroke prior to top dead center under non-acceleration. CONSTITUTION:Control circuit 20 will set the completion timing of fuel injection valve 6 within the intake stroke in the rear of top dead center of respective cylinder under acceleration. Consequently, the intake air speed will go to the maximum at the position of intake valve 8 which will open to the maximum at the time point same with the final reaching time of fuel thus to promote secondary atomization of fuel and the intake efficiency and to improve the transient response, operationability or fuel consumption. Under upon-acceleration such as idling, the completion timing of fuel injection is set immediately before the intake stroke prior to the top dead center. Consequently, the fuel to be discharged from an exhaust valve 5 can be reduced to prevent fire, engine vibration, or deterioration of emission.
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