公开(公告)号：US5082180A

公开(公告)日：1992-01-21

申请号：US453903

申请日：1989-12-20

申请人： Ken-ichi Kubo ,  Xin-he Li

发明人： Ken-ichi Kubo ,  Xin-he Li

IPC分类号： F02M57/02 ,  F02M59/36 ,  F02M59/46

CPC分类号： F02M59/466 ,  F02M57/02 ,  F02M59/366

摘要： An electromagnetic valve includes a tubular valve member fitted on a cylindrical guide member for sliding movement therealong. The guide member has an axial introduction passage leading to a valve seat of the valve member via a communication passage. When the valve member is disengaged from the valve seat, a high-pressure fluid in the introduction passage is spilled into a low pressure chamber provided around the guide member. The electromagnetic valve is incorporated in a unit fuel injector so as to control the spilling of the fuel pressurized by a pump mechanism. In the unit fuel injector, the pump mechanism, the electromagnetic valve and an injection nozzle mechanism are mounted on a linearly-extending body and disposed on the axis of said body. A plunger of the pump mechanism and a nozzle of the injection nozzle mechanism extend along the axis of the body. The electromagnetic valve is disposed between the pump mechanism and the injection nozzle mechanism.

摘要翻译： 电磁阀包括安装在圆筒形引导构件上用于沿其滑动运动的管状阀构件。 引导构件具有通过连通通道通向阀构件的阀座的轴向引入通道。 当阀构件与阀座脱离时，引入通道中的高压流体溢出到设置在引导构件周围的低压室中。 电磁阀装在单元燃料喷射器中，以便控制由泵机构加压的燃料溢出。 在单元燃料喷射器中，泵机构，电磁阀和喷嘴机构安装在线性延伸体上并且设置在所述主体的轴线上。 泵机构的柱塞和喷嘴机构的喷嘴沿主体的轴线延伸。 电磁阀设置在泵机构和喷嘴机构之间。

公开(公告)号：US4951874A

公开(公告)日：1990-08-28

申请号：US390893

申请日：1989-08-08

申请人： Masanori Ohnishi ,  Toshiaki Kasahara ,  Kouichi Saga ,  Xin-he Li

发明人： Masanori Ohnishi ,  Toshiaki Kasahara ,  Kouichi Saga ,  Xin-he Li

IPC分类号： F02M57/02 ,  F02M59/36 ,  F02M59/46

CPC分类号： F02M57/02 ,  F02M59/368 ,  F02M59/466

摘要： A unit fuel injector includes a body, the body having a fuel supply and return chamber, a fuel supply passage communicating with the chamber, and a drain passage communicating with the chamber. The body is provided with a pump mechanism, an injection nozzle mechanism for injecting high pressure fuel from the pump mechanism, and an electromagnetic valve mechanism for escaping the high fuel pressure from the pump mechanism. The electromagnetic valve mechanism include a poppet-type valve member. Immediately when a head of the valve member is disengaged from a valve seat facing the fuel supply and return chamber, the pressurized fuel within the pump mechanism is spilled or fed to the fuel supply and return chamber. The unit fuel injector further includes an auxiliary valve mechanism for opening and closing the drain passage. The auxiliary valve mechanism includes a valve port at one end of the drain passage, and when the head of the valve member abuts against a stop portion of the body, the valve port is closed.

摘要翻译： 单元燃料喷射器包括主体，所述主体具有燃料供给和返回室，与所述室连通的燃料供给通道以及与所述室连通的排出通道。 主体设置有泵机构，用于从泵机构喷射高压燃料的喷嘴机构，以及用于从泵机构排出高燃料压力的电磁阀机构。 电磁阀机构包括提升阀型阀构件。 当阀构件的头部与面向燃料供给和返回室的阀座脱离接合时，泵机构内的加压燃料将立即溢出或送入燃料供给和返回室。 单元燃料喷射器还包括用于打开和关闭排水通道的辅助阀机构。 辅助阀机构包括在排水通道的一端的阀口，并且当阀构件的头部抵靠主体的止动部时，阀口关闭。

公开(公告)号：US4941612A

公开(公告)日：1990-07-17

申请号：US395432

申请日：1989-08-17

申请人： Xin-he Li

发明人： Xin-he Li

IPC分类号： F02M57/02 ,  F02M59/36 ,  F02M59/46

CPC分类号： F02M59/466 ,  F02M57/02 ,  F02M57/023 ,  F02M59/368

摘要： A unit fuel injector includes a body. The body incorporates a pump mechanism, an injection nozzle mechanism for injecting fuel fed thereto from the pump mechanism, and an electromagnetic valve mechanism for relieving high pressure fuel from the pump mechanism. The electromagnetic valve mechanism includes a poppet-type valve member. Immediately when an abutment portion of the valve member is disengaged from a valve seat during a pump stroke, the pressurized fuel is spilled into a spill chamber from the pump mechanism. The fuel injector further includes a mechanism for propelling the valve member in such a direction that said abutment portion is moved away from the valve seat, utilizing the spill fuel pressure. The propelling mechanism includes a bore formed in said body, and a flange provided on a stem portion of the valve member, the flange being slidably fitted in the bore to divide the bore into a pressure introduction chamber and a low pressure chamber along the axis of the valve member. The pressure introduction chamber is connected to the spill chamber so as to receive the spill fuel pressure in the spill chamber whereas the low pressure chamber is connected to a low pressure source disposed exteriorly of the body. With this construction, the valve member is propelled in such a direction that said abutment portion is moved away from the valve seat due to a pressure differential across the flange when the pressure introduction chamber receives the spill fuel pressure.

摘要翻译： 单元燃料喷射器包括主体。 主体包括泵机构，用于喷射从泵机构供给的燃料的喷射喷嘴机构，以及用于从泵机构释放高压燃料的电磁阀机构。 电磁阀机构包括提升阀型阀构件。 在泵冲程期间，当阀构件的邻接部分从阀座脱离时，立即从泵机构溢出加压燃料到溢流室中。 燃料喷射器还包括一个机构，用于利用溢油燃料压力沿着使所述抵接部分远离阀座的方向推动阀构件。 推进机构包括形成在所述主体中的孔和设置在阀构件的杆部上的凸缘，凸缘可滑动地装配在孔中，以将孔分成压力引入室和低压室 阀构件。 压力引入室连接到泄漏室，以便在泄漏室中接收溢出燃料压力，而低压室连接到设置在主体外部的低压源。 通过这种结构，当压力引入室受到溢油燃料压力时，由于跨越凸缘的压力差，阀构件沿着这样一个方向推动，即所述邻接部分从阀座移开。