| 摘要 |
<P>PROBLEM TO BE SOLVED: To contribute to the improvement of the combustion property and the exhaust property of fuel by accelerating atomization of the injected fuel by generating whirling stream in the inside of the nozzle body with simple structure and at low cost. <P>SOLUTION: The fuel injection nozzle 1 has the nozzle body 4 formed with an injection hole 2 for injecting fuel at one end and having a fuel passage 3 for guiding fuel to the injection hole 2, and a needle 5 which is a shaft shape member inserted into the nozzle body 4 and which constitutes a valve part 7 opening and closing the fuel passage 3 by the reciprocating moving in an axial direction to the nozzle body 4 along with the nozzle body 4, the fuel passage 3 has a fuel reservoir part 8, a fuel supply passage 21 arranged an upstream side more than the fuel reservoir part 8 and guiding fuel toward an inserting direction side to the nozzle body 4 of the needle 5, and a direction changing passage part 22 arranged between the fuel reservoir 8 and the fuel supply passage 21, and formed in a direction along a plane perpendicular to the axial direction of the needle 5, and communicating in a direction displaced from the diameter direction of the needle 5 to the fuel reservoir part 8. <P>COPYRIGHT: (C)2012,JPO&INPIT |
