Crowell & Moring LLP
High-pressure fuel supply pump having electromagnetically-driven intake valve
The present invention eliminates a valve holder and accommodates a valve guide in a small space provided between a valve seat and a peripheral surface part of a pressure chamber to reduce the size of a pump. The valve guide guides a stroke of the valve and is provided inside the valve seat. The 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 is 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 that supports a reciprocating motion of the valve, is fixed to the valve housing, face-to-face with an inner peripheral part of the bottomed cylindrical part.
Hitachi Automotive Systems, Ltd.
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Satoshi Masahiko Shingo Kenichiro Hiroyuki Katsumi Tatsuo
Usui Hayatani Tamura Tokuo Yamada Miyazaki Kawano