| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid injection valve preventing leakage of fluid in closing a valve. SOLUTION: A valve body 30 has an opening part 33, a valve seat 34, a fuel reservoir part 35, a first circular conical face 36, a second circular conical face 37, a guide part 38, and a hole part 39, which are formed inside of the valve body 30. The second circular conical face 37 is formed continuously to a guide part 38 guiding reciprocating motions of a needle in an axial direction. The relationship ofθ1>θ2 is satisfied, where a virtual extension face extending from the guide part 38 along a reciprocating direction of the needle is S, an angle on an acute angle side between the first circular conical face 36 and the S isθ<SB>1</SB>, and an angle on an acute angle side between the second circular conical face 37 and the S isθ<SB>2</SB>. Since burrs formed in the continuous portion of the second circular conical face 37 and the guide part 38 when the guide part 38 is formed by grinding the inside of the valve body 30 is reduced, leakage of the fuel from between the needle and the valve seat 34 caused by meshing of the burrs into the valve seat 34 by the reciprocating motions of the needle is reduced. COPYRIGHT: (C)2005,JPO&NCIPI
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