发明授权
- 专利标题: Fuel pressure relief valve
- 专利标题(中): 燃油泄压阀
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申请号: US11954631申请日: 2007-12-12
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公开(公告)号: US07441545B1公开(公告)日: 2008-10-28
- 发明人: Paul Fisher , Paul Mason , Daniel Pangburn , Werner Haarer
- 申请人: Paul Fisher , Paul Mason , Daniel Pangburn , Werner Haarer
- 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
- 代理机构: Michael Best & Friedrich LLP
- 主分类号: F02M37/04
- IPC分类号: F02M37/04
摘要:
A fuel pressure relief valve includes a body defining a passageway having an inlet end in communication with a fuel pump and an outlet end in communication with a fuel rail. The valve also includes a seal member moveable between a first position in which the seal member is seated against the outlet end, and a second position in which the seal member is unseated from the outlet end. The valve further includes a biasing member biasing the seal member toward the second position. The seal member moves from the second position to the first position immediately after fuel pump shutoff to maintain pressure in the fuel rail. The seal member moves from the first position to the second position when fuel in the fuel rail drops to a residual pressure substantially less than the operating pressure to provide a leak path between the fuel pump and the fuel rail.
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