公开(公告)号：US5894991A

公开(公告)日：1999-04-20

申请号：US916267

申请日：1997-08-22

申请人： Steven D. Edwards ,  Dan K. Vetters ,  Dan K. Hickey ,  George L. Muntean ,  Ray J. Amlung ,  Jeffrey L. Campbell

发明人： Steven D. Edwards ,  Dan K. Vetters ,  Dan K. Hickey ,  George L. Muntean ,  Ray J. Amlung ,  Jeffrey L. Campbell

IPC分类号： F02M55/04 ,  F02M57/02 ,  F02M59/32 ,  F02M63/00 ,  F02M45/00 ,  F02M47/02

CPC分类号： F02M57/024 ,  F02M55/04 ,  F02M57/021 ,  F02M59/32 ,  F02M2200/304

摘要： An improved cam operated, open nozzle, unit injector is disclosed including an injector body formed by a barrel, spring housing, and nozzle and containing a central bore for receiving a variable length plunger assembly mounted for reciprocal movement within the injector body wherein the variable length plunger is formed by an outer plunger and inner plunger combined with a timing plunger, mounted between the inner and outer plungers to form a collapsible timing chamber into which a variable quantity of fuel may be metered and expelled on a cycle by cycle basis to provide a variable effective length to the plunger assembly to cause controlled variation in injection timing based on variation in the timing fluid supplied to the injector and wherein the timing plunger is provided with a radial flange for engaging a stop formed in the injector barrel to hold the timing plunger in a predetermined precise location during metering of timing fluid into the collapsible timing chamber and to render the injector timing insensitive to unpredictable pressure variations. The disclosed injector may include a damping chamber for receiving the radial flange of the plunger to eliminate damaging engagement between the timing plunger and the injector barrel. Improved fuel flow passages, check valves and an improved coupling between the outer plunger and the injector's outer return spring are provided along with means for easily changing the rated injection quantity of the disclosed injector.

摘要翻译： 公开了一种改进的凸轮操作的开口喷嘴单元喷射器，其包括由筒体，弹簧壳体和喷嘴形成的喷射器主体，并且包含用于接收安装成用于在喷射器主体内往复运动的可变长度柱塞组件的中心孔，其中可变长度 活塞由外柱塞和内柱塞组成，内柱塞与定时柱塞组合，安装在内柱塞和外柱塞之间以形成可折叠的定时室，可变量的燃料可以逐周期地计量并排出，以提供一个 可变有效长度到柱塞组件，以根据供应给喷射器的定时流体的变化引起喷射正时的受控变化，并且其中定时柱塞设置有径向凸缘，用于接合形成在喷射器筒中的止动件，以保持定时柱塞 在计量定时流体进入可折叠定时室期间的预定精确位置 呃注射器时间对不可预测的压力变化不敏感。 所公开的喷射器可以包括用于接收柱塞的径向凸缘的阻尼室，以消除定时柱塞和喷射器筒之间的有害接合。 提供了改进的燃料流通道，止回阀以及外部柱塞和喷射器的外部复位弹簧之间的改进的联接以及用于容易地改变所公开的喷射器的额定喷射量的装置。

公开(公告)号：US5845623A

公开(公告)日：1998-12-08

申请号：US899318

申请日：1997-08-13

申请人： Norman C. Blizard ,  Raymond J. Amlung ,  George L. Muntean ,  Edward D. Smith ,  Mark Pounder ,  Dan K. Vetters

发明人： Norman C. Blizard ,  Raymond J. Amlung ,  George L. Muntean ,  Edward D. Smith ,  Mark Pounder ,  Dan K. Vetters

IPC分类号： F02M55/00 ,  F02M57/02 ,  F02M59/44 ,  F02M63/02 ,  F02M41/00

CPC分类号： F02M57/021 ,  F02M55/00 ,  F02M55/007 ,  F02M57/024 ,  F02M59/44 ,  F02M63/0225

摘要： A leak prevention device including an expandable chamber and control valve for preventing fuel leakage into the combustion chambers of a internal combustion engine equipped with a common rail fule injection system including open nozzle injectors and a shut off valve mounted in the common rail upstream of the fuel injectors to isolate, when closed, the fuel injectors from the source of fuel under pressure. The expandable chamber contains a variable volume held in its collapsed condition during engine operation and expanded upon engine shutdown sufficiently to prevent the flow of fuel from any injector into the corresponding combustion chamber. The control valve may be a three way valve for controlling the expansion of the variable volume of the expandable chamber The leak prevention device includes a housing assembly connected with a fuel drain and contains an outlet passage fluidically connected at one end with the variable volume and at the other end with the fuel drain and an outlet check valve for allowing fuel to flow in only one direction from the variable volume into the fuel drain. A control circuit is provided to energize solenoids for operating the shut off valve and control valve.

摘要翻译： 一种防泄漏装置，包括可膨胀室和控制阀，用于防止燃料泄漏到内燃机的燃烧室中，所述内燃机配备有共同轨道注入系统，该共用注入系统包括开放喷嘴注入器和安装在燃料上游的共轨中的截止阀 注射器在关闭时隔离燃料喷射器，从燃料源在压力下。 可膨胀室包含在发动机运行期间保持在其折叠状态的可变容积，并且在发动机关闭时膨胀，足以防止燃料从任何喷射器流入相应的燃烧室。 控制阀可以是用于控制可膨胀室的可变容积的膨胀的三通阀。防漏装置包括与燃油排放器连接的壳体组件，并且包含一端与可变容积流体连接的出口通道，并且在 另一端具有燃料排放口和出口止回阀，用于允许燃料在一个方向上从可变容积流入燃料排放口。 提供一个控制电路来为螺线管通电以操作截止阀和控制阀。