Crowell & Moring LLP
High-pressure fuel supply pump having electromagnetically-driven intake valve
Responsiveness is improved in valve opening and valve closing of an electromagnetically driven intake valve unit in which a valve is provided on a pressurizing chamber side of a valve seat. The valve includes an annular abutting surface that abuts the valve seat 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, and the outer surface of an end part of the bottomed cylindrical part is exposed to fuel in a low pressure fuel chamber provided upstream of the fuel introduction hole.
Hitachi Automotive Systems, Ltd.
F F F F F F F F F F F F F F F F H F Y
F02M F16K F04B F04B F04B F02M F04B F02M F02M F16K F04B F16K F02M F04B F16K F02M H02K F02M Y10T
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Masahiko Katsumi Kenichiro Hiroyuki Shingo Tatsuo Satoshi
Hayatani Miyazaki Tokuo Yamada Tamura Kawano Usui