| 摘要 |
A plurality of injection holes (34, 35, 36) are circumferentially arranged in the peripheral wall of the fuel introduction hole (304) at predetermined intervals and at axially different circumferential levels in the leading end portion (32) of the nozzle body (3) to introduce pressurized fuel, and the injection holes at each circumferential level are set different in diameter. On the other hand, a rotary valve (7) has a plurality of fuel guide holes (74, 75, 76) each corresponding to the injection holes at the respective circumferential levels. The fuel guide holes (74, 75, 76) of the rotary valve (7) and the injection holes (34, 35, 36) of the nozzle body (3) are arranged in such a relationship that while the fuel guide holes (74, 75, 76) at one or more than one circumferential level are each made to communicate with the injection holes (34, 35, 36) at one or more than one corresponding circumferential level, the fuel guide holes (74, 75, 76) at the other circumferential levels are not allowed to communicate with any injection holes (34, 35, 36). <IMAGE> |
