| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the emission of unburned fuel in a low speed light load zone in an internal combustion engine provided with a fuel injection valve directly injecting fuel into a cylinder and a fuel injection valve injecting fuel to an intake air passage, and adjusting an intake air quantity by a valve lift. <P>SOLUTION: A fuel injection control device for the internal combustion engine is provided with a variable valve train 9 capable of variably controlling a lift and the opening/closing timing of an intake valve 7 and a working angle of a cam 31 driving the intake valve 7, a first fuel injection valve 11 directly injecting fuel into the cylinder 1, and a second fuel injection valve 14 injecting fuel to the intake passage 5, and adjusts the intake air quantity by the control of the open/close timing of the intake valve 7 by the variable valve train 9. Control for injecting fuel only by the first fuel injection valve 11 is executed when intake valve close timing is after a piston bottom dead center, and control for injecting fuel from the first fuel injection valve 11 and the second fuel injection valve 14 is executed when the intake valve close timing is before piston bottom dead center. <P>COPYRIGHT: (C)2010,JPO&INPIT |
