| 摘要 |
<P>PROBLEM TO BE SOLVED: To eliminate a valve holder and accommodate a valve guide in a small space provided between a valve seat and a peripheral surface part of a pressure chamber to thereby bring a pump into less size. <P>SOLUTION: In order to achieve the above object, the valve guide which guides a stroke of a valve is provided inside the valve seat. Specifically, a valve includes an annular abutting surface that abuts a valve seat formed in a valve housing to shut off a fuel intake passage and a bottomed cylindrical part provided at an inner peripheral part of the annular abutting surface. The bottomed cylindrical part is inserted into a fuel introduction hole formed in the valve housing inside the valve seat. A member having a cylindrical surface part which supports a reciprocating motion of the valve, is fixed to the valve housing, in face-to-face with an inner peripheral part of the bottomed cylindrical part. Thus, the size of the valve guide that protrudes from the surface of the valve seat to the pressure chamber side can be shortened, which brings an inlet valve mechanism portion into less size and eventually renders the pump in a small size. <P>COPYRIGHT: (C)2012,JPO&INPIT |
