| 摘要 |
PROBLEM TO BE SOLVED: To reduce and suppress an injection fuel, promote the atomization of the injection fuel, and stabilize a spray form by preventing swirl from occurring in the reversal of the fuel in the outlet hole of a valve seat member to reduce pressure loss in a fuel injection valve. SOLUTION: In this fuel injection valve, a funnel-like fuel collecting recessed part 35 collecting and guiding the fuel passed through a valve seat 8 is formed in a valve seat member 3 between the valve seat 8 and the outlet hole 7, and a flat fuel diffusion chamber 36 dispersing the fuel passed through the outlet hole 7 in a radial outer direction and guiding into a plurality of fuel nozzle holes 11 is formed between the opposed faces of the valve seat member 3 and an injector plate 10. The inner peripheral surface 7A of the outlet hole 7 is formed along the inner peripheral side curved surface of a virtual torus T so as to be continued with the bottom surface of the fuel collecting recessed part 35 and the ceiling surface of the fuel diffusion chamber 36. COPYRIGHT: (C)2006,JPO&NCIPI
|
