发明授权
- 专利标题: Solenoid actuator and fuel injector using same
- 专利标题(中): 电磁阀执行器和燃油喷射器使用相同
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申请号: US12972869申请日: 2010-12-20
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公开(公告)号: US08729995B2公开(公告)日: 2014-05-20
- 发明人: Jayaraman Venkataraghavan , John McDonnell , Nadeem Bunni , Christopher D. Hanson
- 申请人: Jayaraman Venkataraghavan , John McDonnell , Nadeem Bunni , Christopher D. Hanson
- 申请人地址: US IL Peoria
- 专利权人: Caterpillar Inc.
- 当前专利权人: Caterpillar Inc.
- 当前专利权人地址: US IL Peoria
- 代理机构: Liell & McNeil
- 主分类号: H01F7/02
- IPC分类号: H01F7/02 ; F02M51/06 ; H01F7/16
摘要:
In one aspect, a fuel injector includes an injector body that defines a fuel inlet, a drain outlet and a nozzle outlet. A direct operated check valve is positioned in the injector body and includes a needle valve member with an opening hydraulic surface exposed to fluid pressure in a nozzle supply passage, and a closing hydraulic surface exposed to fluid pressure in a needle control chamber. The needle valve member is movable between a first position at which the nozzle supply passage is blocked to the nozzle outlet, and a second position at which the nozzle supply passage is open to the nozzle outlet. A needle control valve is positioned in the injector body and includes a control valve member movable between a first position at which the needle control chamber is fluidly connected to the drain outlet, and a second position at which the needle control chamber is fluidly blocked to the drain outlet. A solenoid actuator is positioned in the injector body and includes a stator assembly and an armature assembly coupled to the control valve member. One of the stator assembly and the armature assembly includes a non-magnetic insert that moves into and out of contact with another of the stator assembly and the armature assembly at an energized position and a de-energized position, respectively.
公开/授权文献
- US20120153034A1 Solenoid Actuator And Fuel Injector Using Same 公开/授权日:2012-06-21