| 摘要 |
PROBLEM TO BE SOLVED: To properly disperse fuel density of a spray injected from a main nozzle port, while securing spray achieving force of the main nozzle port, for enhancing stability of ignition and combustion in a low speed-low load area, in a spark ignition type cylinder direct injection engine having a spark plug arranged in a combustion chamber and a multi-hole injector for injecting fuel into the combustion chamber. SOLUTION: This multi-hole type injector 1 has the main nozzle port 10 having the injection center pointing to the spark plug 2, and a sub-nozzle port having the injection center pointing in the direction different from the injection center of the main nozzle port. While setting spray achieving force of the sub-nozzle port so as to reduce more than the spray achieving force of the main nozzle port 10, in the cross-sectional area of the main nozzle port 10, an inner diameter of an outlet part 12 is set larger than an inner diameter of an inlet part 11. COPYRIGHT: (C)2008,JPO&INPIT
|
