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公开(公告)号：US5040727A
公开(公告)日：1991-08-20
申请号：US554465
申请日：1990-07-19
申请人： George L. Muntean , Gary L. Gant , C. Edward Morris, Jr. , David Bolis , Kevin L. Vogt , David E. Shultz
发明人： George L. Muntean , Gary L. Gant , C. Edward Morris, Jr. , David Bolis , Kevin L. Vogt , David E. Shultz
IPC分类号： F02M57/02
CPC分类号： F02M57/021
摘要： A unit fuel injector is disclosed to be used in a fuel injection system of an internal combustion engine wherein each unit injector is operated independently from one another and in synchronization with the internal combustion engine. Specifically, the unit injector in accordance with the present invention includes a reciprocating plunger assembly within the unit injector that controls fuel metering as well as fuel injection, and a valve device positioned between a minor diameter plunger section and a cup of the unit injector so as to permit fuel flow in one direction for fuel injection and to restrict flow of gases in the opposite direction. The valve device effectively reduces carbon build-up on the injector surfaces and increases injector longevity while reducing maintenance. Moreover, fuel metering is accurately controlled without substantial carboning flow losses.
摘要翻译： 公开了用于内燃机的燃料喷射系统中的单元燃料喷射器，其中每个单元喷射器彼此独立地并且与内燃机同步地操作。 具体而言，根据本发明的单元喷射器包括在单元喷射器内的往复式柱塞组件，其控制燃料计量以及燃料喷射，以及定位在小直径柱塞部分和单元喷射器杯之间的阀装置，以便 以允许燃料在一个方向上的流动用于燃料喷射并且限制气体沿相反方向的流动。 阀装置有效地减少了喷射器表面的碳积累并且在减少维护的同时增加了喷射器寿命。 此外，燃料计量被精确地控制，而没有实质的碳化流动损失。
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公开(公告)号：US5042721A
公开(公告)日：1991-08-27
申请号：US554429
申请日：1990-07-19
CPC分类号： F02M57/021 , F02M59/30 , F02M61/16 , F02M61/18
摘要： The present invention is directed to open nozzle unit fuel injectors for injecting a metered quantity of fuel into the cylinder of an internal combustion engine, as synchronously controlled by a drive train, wherein the unit fuel injector comprises a body with an axial bore and a plunger assembly movable therein between a retracted position and an advanced position. The plunger includes a major diameter section, slidably movable in the axial bore to open and close a fuel supply orifice and a minor diameter section which extends in a bore of a cup portion of the injector body. The cup portion has an internal surface including plural diameter portions connected by an annular step. In accordance with the present invention, the fuel supply orifice is specifically located within the axial bore and the plunger minor diameter section is designed such that when the plunger is moved from its retracted to its advanced position, a portion of the minor diameter section becomes radially engaged, or almost engaged, with one of the plural cup surface sections before the major diameter plunger section closes the fuel supply orifice. The engagement being between the minor diameter portion and one of the plural cup internal surface sections that will be nearest to one another during the entire range of plunger movement from the retracted to advanced positions.
摘要翻译： 本发明涉及一种用于将计量的燃料喷射到内燃机的气缸中并由传动系统同步控制的开式喷嘴单元燃料喷射器，其中单元燃料喷射器包括具有轴向孔的主体和柱塞 组件可以在缩回位置和前进位置之间移动。 该柱塞包括一个可在轴向孔内滑动移动的大直径部分，以打开和关闭燃料供应孔和在喷射器主体的杯部分的孔中延伸的小直径部分。 杯部具有包括通过环状台阶连接的多个直径部的内表面。 根据本发明，燃料供应孔特别地位于轴向孔内，并且柱塞小直径部分被设计成使得当柱塞从其缩回运动到其前进位置时，小直径部分的一部分变成径向 在大直径柱塞部分关闭燃料供应孔口之前，与多个杯形表面部分中的一个接合或接合。 所述接合位于所述小直径部分和所述多个杯内表面部分中的一个之间，所述多个杯内表面部分在从所述缩回位置到所述前进位置的整个活塞范围期间将彼此最接近。
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公开(公告)号：US5673853A
公开(公告)日：1997-10-07
申请号：US528220
申请日：1995-09-13
申请人： John D. Crofts , Mustahsen Gull , Edward B. Manring , Hisham K. Mozaffar , Jeffrey J. Sullivan , Kevin L. Vogt , Harry L. Wilson , George L. Muntean , Gary L. Gant , Daniel K. Hickey
发明人： John D. Crofts , Mustahsen Gull , Edward B. Manring , Hisham K. Mozaffar , Jeffrey J. Sullivan , Kevin L. Vogt , Harry L. Wilson , George L. Muntean , Gary L. Gant , Daniel K. Hickey
CPC分类号： F02M59/366 , F02M57/023 , F02M59/466
摘要： An electromagnetic fuel injection control valve positioned inside a fuel injector, i.e. a unit injector, for providing fast response and high pressure capability while minimizing the size and complexity of the injector. The control valve includes a valve housing having a supply inlet and fuel outlet, a center tube having a center passage and an annular valve seat, a control valve sleeve slidably mounted on the center tube and an actuator assembly having a coil spring, a stator and an armature. The control valve sleeve moves between an open position permitting fuel to flow between the supply inlet and the fuel outlet and a closed position which sealingly engages the annular valve seat for blocking the flow of fuel between the supply inlet and the fuel outlet. The coil spring biases the control valve sleeve in an open position and is positioned around the center tube. The stator is also axially positioned around the center tube and includes multiple poles. The armature connects to the control valve sleeve and reciprocates when solenoid is activated to allow for high pressure fuel injection into the combustion chamber of an internal combustion engine.
摘要翻译： 位于燃料喷射器内部的电磁燃料喷射控制阀，即单元喷射器，用于在使喷射器的尺寸和复杂度最小化的同时提供快速响应和高压能力。 控制阀包括具有供应入口和燃料出口的阀壳体，具有中心通道和环形阀座的中心管，可滑动地安装在中心管上的控制阀套管和具有螺旋弹簧，定子和 电枢。 控制阀套筒在允许燃料在供应入口和燃料出口之间流动的打开位置和密封地接合环形阀座的关闭位置之间移动，以阻断供应入口和燃料出口之间的燃料流动。 螺旋弹簧将控制阀套件偏压在打开位置并且围绕中心管定位。 定子也围绕中心管轴向定位并且包括多个极。 电枢连接到控制阀套筒，当螺线管被激活以允许高压燃料喷射到内燃机的燃烧室时往复运动。
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公开(公告)号：US4813600A
公开(公告)日：1989-03-21
申请号：US109048
申请日：1987-10-16
CPC分类号： F02M61/161 , F02M53/04 , F02M55/002 , F02M57/021 , F02M61/168
摘要： An improved, simplified pressure/time dependent fuel injector assembly for injecting fuel intermittently into a combustion chamber of an internal combustion engine. The injector assembly includes a unitary or single-piece injector body which has at least one groove-like channel on the exterior surface thereof. The channel is closed and sealed by a sleeve which is press-fit about that portion of the injector body on which the channel lies. For reciprocation within the injector body, there is provided an injector-plunger assembly which includes a top stop mechanism for adjustably setting the distance traveled by the plunger assembly during the reciprocatory movement thereof.
摘要翻译： 一种用于将燃料间歇地喷射到内燃机的燃烧室中的改进的，简化的压力/时间依赖性燃料喷射器组件。 喷射器组件包括在其外表面上具有至少一个凹槽状通道的整体或单件式喷射器主体。 通道被封闭并被套筒密封，套管围绕通道所在的喷射器主体的该部分压配合。 为了在喷射器主体内往复运动，提供了一种喷射器 - 柱塞组件，其包括顶部止动机构，用于可调节地设定柱塞组件在往复运动期间行进的距离。
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公开(公告)号：US06199533B1
公开(公告)日：2001-03-13
申请号：US09241081
申请日：1999-02-01
IPC分类号： F02B300
CPC分类号： F02M59/46 , F02M59/466 , F02M63/0003 , F02M63/0005 , F02M63/0007 , F02M2200/04 , H01L21/2022 , H01L21/3221 , H01L21/3226 , Y10T137/86919
摘要： A three-way fuel injection control valve assembly is provided which includes a pilot valve for controlling the movement of a drain valve member and a separate supply valve member to minimize valve response time and transition flow losses. The solenoid operated two-way pilot valve controls the flow of fuel from a control volume formed adjacent the ends of the drain valve member and the supply valve member to begin and end an injection event. A transition flow loss limiting feature is provided which causes the drain valve member to close prior to the opening of the supply valve member and subsequently causes the supply valve member to close prior to the opening of the drain valve member during a given injection event thereby minimizing transition flow losses. The transition flow loss limiting feature includes sizing the cross sectional areas of the supply valve member and the drain valve member, sizing a bias plunger for biasing the drain valve member and sizing one or more bias springs so that no opening overlap occurs between the supply valve member and the drain valve member.
摘要翻译： 提供一种三通燃料喷射控制阀组件，其包括用于控制排放阀构件和单独的供应阀构件的运动的先导阀，以最小化阀响应时间和过渡流量损失。 螺线管操作的双向先导阀控制从邻近排水阀构件和供给阀构件的端部形成的控制体积的燃料流开始和结束喷射事件。 提供了一种过渡流量损失限制特征，其使得排放阀构件在供给阀构件打开之前关闭，并且随后在给定的注射事件期间使供给阀构件在排水阀构件的打开之前关闭，从而最小化 过渡流量损失。 过渡流量损失限制特征包括确定供应阀构件和排水阀构件的横截面面积，调整偏压柱塞的尺寸以偏置排水阀构件并调整一个或多个偏压弹簧，使得在供给阀 构件和排水阀构件。
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公开(公告)号：US5630398A
公开(公告)日：1997-05-20
申请号：US658574
申请日：1996-06-05
IPC分类号： F02M41/06 , F02M59/44 , F02M41/00 , F16K11/076
CPC分类号： F02M41/06 , F02M41/063 , F02M59/44 , Y10T137/86501
摘要： A stepped rotation fuel distribution valve for receiving and conducting metered, pressurized fuel pulses to the combustion cylinders of a diesel engine is provided. The valve includes a fuel distribution shaft rotatably mounted in a valve housing. The shaft includes a fuel discharge port that is sequentially registrable with fuel distributing passages in the housing that ultimately lead to the diesel fuel injectors associated with the combustion cylinders of the engine. A drive mechanism, which may include a stepper motor, intermittently rotates the fuel distributor shaft so that the shaft discharge port dwells in registration with one of the fuel distributing passages at the time a pressurized pulse of fuel is discharged through the shaft discharge port. The drive mechanism may also include either a set of timing gears or a spring coupling to achieve the desired intermittent rotation. In all cases, the intermittent rotation of the fuel distribution shaft prevents the shaft from rotating at a time when the discharge of a highly pressurized fuel pulse applies a high side load to the shaft which in turn can generate high frictional forces between the fuel distribution shaft and the surrounding housing.
摘要翻译： 提供了一种用于接收和传导计量的加压燃料脉冲到柴油发动机的燃烧气缸的阶梯式旋转燃料分配阀。 阀包括可旋转地安装在阀壳体中的燃料分配轴。 该轴包括燃料排放口，该燃料排出口可与壳体中的燃料分配通道顺序地分配，其最终导致与发动机的燃烧气缸相关联的柴油喷射器。 可以包括步进电机的驱动机构间歇地旋转燃料分配器轴，使得在通过轴排出口排出加压的燃料脉冲时，轴排出口与燃料分配通道中的一个对准。 驱动机构还可以包括一组定时齿轮或弹簧联接器以实现期望的间歇旋转。 在所有情况下，燃料分配轴的间歇旋转防止轴在高压燃料脉冲的排放向轴施加高侧负荷时旋转，而轴可以在燃料分配轴之间产生高摩擦力 和周围的房屋。
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公开(公告)号：US5335852A
公开(公告)日：1994-08-09
申请号：US10313
申请日：1993-01-28
申请人： George L. Muntean , Harry L. Wilson , Gary L. Gant
发明人： George L. Muntean , Harry L. Wilson , Gary L. Gant
CPC分类号： F02M63/0001 , F02M57/024 , F02M59/30 , F02M59/32
摘要： A unit fuel injector adapted for periodic injection of fuel into a combustion chamber of an engine at variable times from cycle to cycle under the control of the engine lubrication fluid is provided, comprising an injector body containing an injector cavity and a discharge orifice communicating with one end of the injector cavity to discharge fuel into the combustion chamber, a lubrication fluid timing circuit and a fuel metering circuit separate from the lubrication fluid timing circuit. A lubrication fluid link positioned in the lubrication fluid timing circuit within the injector cavity has a variable effective length which is varied by the operation of a control valve positioned within the lubrication timing circuit to vary the timing of injection. The control valve is operated to control the flow of lubrication fluid in the lubrication fluid timing circuit to control both the timing of injection and the metering of fuel on a cycle by cycle basis. The control valve is operable to be placed in a first position in which lubrication fluid may flow through the lubrication fluid timing circuit into the timing chamber and fuel flow from the fuel metering circuit into the metering chamber is shut off and a second position in which lubrication fluid flow into the timing chamber is shut off. Lubrication fluid is maintained at a higher pressure than the fuel pressure when the control valve is in the first position to stop the movement of a metering plunger to define the metered quantity of fuel thereby avoiding the need for a bias spring. By using lubrication fluid as timing fluid in a timing circuit separate from the fuel metering circuit, the amount of fuel required by the injector and the amount of heated fuel returned to the fuel supply tank is minimized.
摘要翻译： 提供了一种单元燃料喷射器，其适于在发动机润滑流体的控制下，在循环到循环的可变时间周期性地将燃料喷射到发动机的燃烧室中，所述单元燃料喷射器包括喷射器主体，所述喷射器主体包含喷射器腔和与一个 喷射器腔的端部以将燃料排放到燃烧室中，润滑流体定时电路和与润滑流体定时电路分离的燃料计量电路。 位于喷射器腔内的润滑流体定时电路中的润滑流体连接件具有可变的有效长度，该有效长度通过位于润滑定时电路内的控制阀的操作而改变，以改变喷射时间。 控制阀被操作以控制润滑流体定时电路中的润滑流体的流动，以逐周期地控制喷射时间和燃料计量。 控制阀可操作以被放置在第一位置，在该第一位置，润滑流体可以通过润滑流体定时回路流入定时室，并且从燃料计量回路进入计量室的燃料流被切断，而第二位置中润滑 流入定时室的流体被切断。 当控制阀处于第一位置时，润滑流体被保持在比燃料压力更高的压力，以停止计量柱塞的运动以限定计量的燃料，从而避免了对偏置弹簧的需要。 通过使用润滑流体作为与燃料计量回路分开的定时回路中的定时流体，喷射器所需的燃料量和返回到燃料供应罐的加热燃料的量被最小化。
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公开(公告)号：US5372114A
公开(公告)日：1994-12-13
申请号：US142983
申请日：1993-10-29
申请人： Gary L. Gant , P. Douglas Free , James R. Katzenmeyer , Donald E. Duckworth , George L. Muntean
发明人： Gary L. Gant , P. Douglas Free , James R. Katzenmeyer , Donald E. Duckworth , George L. Muntean
CPC分类号： F01L1/2411 , F02M57/024 , F02M59/102 , F02B3/06
摘要： A hydraulic tappet for use in the fuel injector drive trains of compression ignition or diesel internal combustion engines are provided which optimize injector timing for improved fuel economy. One embodiment of the hydraulic tappet of the present invention includes a dampened pressure regulating feature which determines blow down pressure. A second embodiment of the hydraulic tappet of the present invention includes a dampening load cell feature which allows the blow down pressure of the load cell to be increased and injection timing to be optimally advanced.
摘要翻译： 提供了一种用于压燃式或柴油内燃机的燃油喷射器驱动系的液压挺杆，其优化喷油器正时以提高燃油经济性。 本发明的液压挺杆的一个实施例包括确定排气压力的阻尼压力调节特征。 本发明的液压挺杆的第二实施例包括阻尼载荷传感器特征，其允许增加测力传感器的排气压力并且最佳地提前喷射正时。
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公开(公告)号：US4280659A
公开(公告)日：1981-07-28
申请号：US59543
申请日：1979-07-23
CPC分类号： F02M57/021
摘要： This disclosure relates to a unit-type fuel injector for an internal combustion engine such as a reciprocating piston internal combustion engine. The injector includes an injector body forming a plunger bore, and a plunger that reciprocates in the bore. A fuel supply passage and a drain passage are formed in the body, and a fuel injection chamber is formed at the lower end of the plunger bore. A feed hole connects the chamber with the supply passage, and a scavenge passage connects the supply and drain passages. During a retracted plunger, or fuel metering, portion of the injector cycle, the plunger opens the feed hole and closes the scavenge passage, and during a down plunger, or scavenging, portion of the injector cycle, the plunger closes the feed hole and opens the scavenge passage. An annular groove is formed between injector parts and surrounds the chamber, and the groove collects leakage. A restricted bleed hole connects the groove with the low pressure drain and removes the leakage. The feed hole is at an end of the supply passage, and the incoming fuel flows in a direct path through the supply passage and feed hole to the injection chamber.
摘要翻译： 本公开涉及一种用于诸如往复活塞式内燃机的内燃机的单元型燃料喷射器。 喷射器包括形成柱塞孔的喷射器主体和在孔中往复运动的柱塞。 燃料供给通道和排放通道形成在主体中，并且燃料喷射室形成在柱塞孔的下端。 进料孔将该腔室与供给通道连接起来，并且一个清流通道连接供排通道。 在缩回柱塞或燃料计量期间，喷射器循环的一部分，柱塞打开进料孔并关闭清除通道，并且在喷射器循环的下降柱塞或清扫部分期间，柱塞关闭进料孔并打开 清扫通道。 在喷射器部件之间形成一个环形槽并围绕该腔室，并且凹槽收集泄漏。 限流排放孔将沟槽与低压排水管连接起来，消除泄漏。 进料孔位于供给通道的一端，进入的燃料直接通过供给通道和进料孔流到喷射室。
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公开(公告)号：US6109542A
公开(公告)日：2000-08-29
申请号：US157389
申请日：1998-09-21
IPC分类号： F02M47/02
CPC分类号： F02M47/027
摘要： A servo-controlled fuel injector is provided which includes a leakage limiting valve device for limiting the quantity of high pressure fuel available for leakage into the combustion chamber in the event the closed nozzle valve element fails to sealingly engage its seat between injection events. The servo-controlled fuel injector includes a control volume positioned adjacent an outer end of the nozzle valve element, a control volume charge circuit for supplying fuel to the control volume, a drain circuit for draining fuel from the control volume to a low pressure drain and an injection control valve positioned along the drain circuit for controlling the flow through the drain circuit so as to cause reciprocal movement of the nozzle valve element. The leakage limiting valve is integrated into the fuel injector body and positioned along a fuel transfer passage to block the flow of high pressure fuel to a nozzle cavity between injection events. The leakage limiting valve may be a cylindrical valve element positioned between the nozzle valve element and the injection control valve. Alternatively, the leakage limiting valve may be in the form of an annular valve sleeve slidably mounted on one end of the nozzle valve element so as to position the control volume immediately adjacent the injection control valve thereby minimizing the trapped volume and thus the valve response time.
摘要翻译： 提供了一种伺服控制的燃料喷射器，其包括泄漏限制阀装置，用于在关闭喷嘴阀元件在喷射事件之间不能与其阀座密封接合的情况下，限制可用于泄漏到燃烧室中的高压燃料的量。 伺服控制的燃料喷射器包括邻近喷嘴阀元件的外端定位的控制体积，用于向控制体积供给燃料的控制体积充电电路，用于将燃料从控制容积排出到低压排水管的排水回路，以及 沿排水回路设置的喷射控制阀，用于控制通过排水回路的流动，从而引起喷嘴阀元件的往复运动。 泄漏限制阀被集成到燃料喷射器主体中并且沿着燃料传送通道定位，以阻止喷射事件之间的高压燃料流向喷嘴腔。 泄漏限制阀可以是位于喷嘴阀元件和喷射控制阀之间的圆柱形阀元件。 或者，泄漏限制阀可以是可滑动地安装在喷嘴阀元件的一端上的环形阀套的形式，以便将控制体积定位在紧邻喷射控制阀的位置，从而最小化被捕获的体积，从而使阀响应时间 。
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