发明授权
- 专利标题: High-pressure pump for a fuel injection system of an internal combustion engine
- 专利标题(中): 用于内燃机燃油喷射系统的高压泵
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申请号: US10593326申请日: 2005-01-18
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公开(公告)号: US07363913B2公开(公告)日: 2008-04-29
- 发明人: Andreas Dutt , Jochen Aleker
- 申请人: Andreas Dutt , Jochen Aleker
- 申请人地址: DE Stuttgart
- 专利权人: Robert Bosch GmbH
- 当前专利权人: Robert Bosch GmbH
- 当前专利权人地址: DE Stuttgart
- 代理商 Ronald E. Greigg
- 优先权: DE102004013244 20040318
- 国际申请: PCT/EP2005/050193 WO 20050118
- 国际公布: WO2005/090790 WO 20050929
- 主分类号: F04B1/04
- IPC分类号: F04B1/04 ; F04B1/00
摘要:
A high-pressure pump has at least one pump element, with a pump piston which is guided displaceably in a cylinder bore of a housing part of the high-pressure pump and is driven in a reciprocating motion and defines a pump work chamber in the cylinder bore, into which chamber fuel is aspirated via an inlet valve in the intake stroke of the pump piston. The inlet valve has a pistonlike valve member, which with a sealing face cooperates with a valve seat for controlling the communication of the pump work chamber with the fuel inlet. The valve member is disposed with a head, on which the sealing face is embodied, in the pump work chamber and protrudes out of the pump work chamber with a shaft adjoining the head. The valve seat is formed in the housing part at a transition from the cylinder bore to a bore of smaller diameter adjoining the cylinder bore. With its shaft, the valve member protrudes through the bore into a region of the housing part remote from the pump work chamber, in which region a closing spring is disposed that engages the shaft of the valve member.
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