| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a combustion condition by suppressing the disturbance of intake air without lowering a degree of the stratification of air-fuel mixture. <P>SOLUTION: A direct injection type internal combustion engine 10 includes an intake passage injection valve 30 for injecting (port injection) fuel into an intake passage 20, and a cylinder injection valve 32 for injecting (cylinder injection) fuel into a cylinder 12. An ECU reduces the amount of the port injection and increases the amount of the cylinder injection in an intake stroke when a combustion fluctuation is greater than an allowable level in the state of executing both the port injection and the cylinder injection. This increases the amount of the cylinder injection in the intake stroke while holding the whole amount of the fuel injection constant, to suppress the disturbance of intake air, thus reducing the combustion fluctuation without lowering a degree of stratification of air-fuel mixture. <P>COPYRIGHT: (C)2011,JPO&INPIT |
