| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve capable of promoting the atomization of a jetted fuel and increasing the penetrating property of the jetted fuel by minimizing the dead volume of a fuel flow passage from a valve seat to fuel nozzle holes and minimizing the pressure loss of the fuel in the fuel flow passage. SOLUTION: This fuel injection valve comprises a valve seat member 3 having a conical valve seat 8 and a valve hole 7 passed through its center part, a valve element 18 in association with the valve seat 8, and an injector plate 10 having the plurality of fuel nozzle holes 11 arranged displaceably from the valve hole 7 to the radial outer side and joined to the front end face of the valve seat member 3. A fuel guide member 40 facing the valve hole 7 is arranged continuously with the injector plate 10, and a plurality of diffusion chamber 39 to which the outer peripheral surface of the fuel guide member 40 faces and the inner ends of the fuel nozzle holes 11 are open is formed between the valve seat member 3 and the injector plate 10. A plurality of closed parts 41 partially closing the valve hole 7 and a plurality of cutout parts 42a and 42b are alternately formed in the outer peripheral part of the fuel guide member 40. These cutout parts 42a and 42b are disposed to be externally brought into contact with a virtual circle C2 about the axis Y of the valve seat member 3. COPYRIGHT: (C)2006,JPO&NCIPI
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