Crowell & Moring LLP
High-pressure fuel supply pump
A fuel pump includes an electromagnetically driven intake valve mechanism, a pump housing, a discharge valve, an opening, a seal member, and a first relief passage. The relief valve mechanism has a relief valve, a relief valve seat contacting the relief valve when the relief valve is closed and a relief spring biasing the relief valve against the relief valve seat. A second relief passage, communicating the first relief passage and a hole formed in the relief seat, is formed between the seal member and the relief valve seat. The relief valve seat, the relief valve, and the relief spring are arranged in this order beginning from the open end side.
Hitachi Automotive Systems, Ltd.
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Atsuji Yuta Moritsugu Hiroyuki Satoshi Atsushi Shingo
Saito Saso Akiyama Yamada Usui Hohkita Tamura