| 摘要 |
PROBLEM TO BE SOLVED: To provide stable spray atomization and stable jetting direction, by using "a fuel flow of large flow strength" heading a nozzle port inlet. SOLUTION: In respective nozzle ports 7 formed in a nozzle port plate 3 of a fuel injection valve, a long wall 7a having the long wall surface length is arranged on the downstream side of "the fuel flow A of large flow strength" heading the nozzle port inlet, and a short wall 7b having the short wall surface length is arranged on the upstream side of "the fuel flow A of large flow strength" heading the nozzle port inlet. The side for strongly pressing fuel flowing in the nozzle ports 7 is arranged as the long wall 7a, and the fuel injection direction can be stabilized by lengthening a distance for restricting fuel. While, atomization of the fuel is improved and stabilized, by opening a repetitive flow of the fuel separating to the opposite side to the outside of the nozzle ports 7 by reflection by being strongly pressed to the long wall 7a without being straightened by a nozzle port wall, by arranging the opposite side of the side for strongly pressing the fuel in the nozzle ports 7 as the short wall 7b. COPYRIGHT: (C)2008,JPO&INPIT
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