High-pressure fuel supply pump having electromagnetically-driven intake valve

摘要

It is an object of the present invention 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. In order to achieve the above object, the valve guide (SG) which guides a stroke of a valve (203) is provided inside the valve seat (214S). Specifically, a valve (203) includes an annular abutting surface (203R) that abuts a valve seat (214S) formed in a valve housing (214) to shut off a fuel intake passage and a bottomed cylindrical part (203F,203H) provided at an inner peripheral part of the annular abutting surface (203R). The bottomed cylindrical part (203F,203H) is inserted into a fuel introduction hole (214P) formed in the valve housing (214) inside the valve seat (214S). A member having a cylindrical surface part which supports a reciprocating motion of the valve (203), is fixed to the valve housing (214), in face-to-face with an inner peripheral part of the bottomed cylindrical part (203F,203H). Thus, the size of the valve guide (SG) that protrudes from the surface of the valve seat (214S) to the pressure chamber side can be shortened. It is therefore possible to bring an inlet valve mechanism portion into less size and eventually render the pump in a small size.