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US 10,788,003 B2Granted
High-pressure fuel supply pump
AssigneeHitachi Automotive Systems, Ltd.
InventorsMinoru Hashida, Atsushi Hohkita, Masayuki Suganami, Satoshi Usui, Masaru Kawai, Arata Kagiyama
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Abstract
It is an object of the present invention to provide a high-pressure fuel supply pump having a pump body capable of improving corrosion resistance and weldability and being manufacturable by forging. Therefore, in the high-pressure fuel supply pump having a metal pump body forming a pressurizing chamber, the pump body is made of a steel material containing 12% to 18% of Cr and 3% to 7% of Ni, and the pump body has a forging surface on a part of the outer peripheral surface.
Claims18
A high-pressure fuel supply pump, comprising:
- a metal pump body forming a pressurizing chamber, wherein
- the pump body is made of a steel material containing 12% to 18% of Cr and 3% to 7% of Ni, and the pump body has a forging surface on a part of its outer peripheral surface, wherein
- the pump body is made of a steel material containing 0.5% to 3% of Mo, and the pump body has a tensile strength characteristic of at least 900 MPa.
Dependencies are inferred from the claim text.