发明授权
- 专利标题: Common-rail fuel injection system for an engine
- 专利标题(中): 用于发动机的共轨燃油喷射系统
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申请号: US561067申请日: 1995-11-22
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公开(公告)号: US5638791A公开(公告)日: 1997-06-17
- 发明人: Yoshihiro Tsuzuki , Toshihiko Igashira , Yasuyuki Sakakibara , Kazuhide Watanabe
- 申请人: Yoshihiro Tsuzuki , Toshihiko Igashira , Yasuyuki Sakakibara , Kazuhide Watanabe
- 申请人地址: JPX Nishio
- 专利权人: Nippon Soken Inc.
- 当前专利权人: Nippon Soken Inc.
- 当前专利权人地址: JPX Nishio
- 优先权: JPX6-312042 19941215
- 主分类号: F02M47/00
- IPC分类号: F02M47/00 ; F02M47/02 ; F02M51/00 ; F02M55/02 ; F02M59/36 ; F02M37/04
摘要:
A common-rail fuel injection system for an engine includes a fuel injector having a nozzle hole. A common rail stores high-pressure fuel. The common rail is connected to the fuel injector to feed the high-pressure fuel thereto. A movable nozzle needle disposed in the fuel injector blocks and unblocks the nozzle hole in accordance with movement thereof. A back pressure control chamber defined in the fuel injector is connected to the common rail to receive the high-pressure fuel therefrom. The nozzle needle is urged in a direction of blocking the nozzle hole in response to a pressure in the back pressure control chamber. A fuel chamber defined in the fuel injector is connected to the common rail to receive the high-pressure fuel therefrom. The nozzle needle is urged in a direction of unblocking the nozzle hole in response to a pressure in the fuel chamber. A fuel-pressure-responsive 2-way valve controls the pressure in the back pressure control chamber. An electromagnetic valve changes a state of the fuel-pressure-responsive 2-way valve. The fuel injector and the fuel-pressure-responsive 2-way valve are combined into a single unit. The electromagnetic valve is separate from the fuel injector.