| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a processing method of a nozzle hole in an injector having a group nozzle hole capable of securing the processing accuracy of the nozzle hole and capable of reducing the variation of exhaust gas properties. <P>SOLUTION: In the nozzle hole boring method of the injector 1 having the group nozzle hole 10 wherein a plurality of intersection points of an axial line of the injector 1 and an axial line of the nozzle hole 10a formed at the injector 1 exist, plane parts 10c and 10d perpendicular to the nozzle hole 10a and including an opening of the nozzle hole 10a are formed at a hole boring part of the nozzle hole 10a. A recess 10b is formed at the boring part and the plane part 10c is formed on at the bottom of the recess 10b, or the boring part is cut and the plane parts 10c and 10d are formed, or the boring part is forged and the plane parts 10c and 10d are formed. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
