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公开(公告)号：US07059301B2
公开(公告)日：2006-06-13
申请号：US10370000
申请日：2003-02-20
CPC分类号： F02M63/028 , F02M45/00 , F02M45/12 , F02M47/027 , F02M57/025 , F02M59/466 , F02M63/0015 , F02M63/004 , F02M63/0045
摘要： Fuel injectors equipped with direct control needle valves can add new capabilities to a fuel injection system, but can sometimes have difficulty in achieving low hydrocarbon emissions at levels comparable to ancestor fuel injectors that utilize a simple spring biased needle. The present invention seeks lower hydrocarbon emissions by reducing fuel pressure before the direct control needle valve member has reached its closed position toward the end of an injection event. Reducing fuel pressure can be accomplished in a number of ways depending upon the particular fuel injection system, including spilling fuel pressure in a cam system or possibly relieving pressure on an intensifier piston. By employing this strategy, fuel spray from the fuel injector can effectively end before the direct control needle valve member reaches its closed position, thus avoiding hydrocarbon production that could be caused by a small amount of fuel pushed into the combustion space as the needle moves over the last portion of its movement toward its closed position.
摘要翻译： 装备有直接控制针阀的燃油喷射器可以为燃料喷射系统增加新的功能，但是有时难以实现与使用简单弹簧偏压针的祖先燃料喷射器相当的低碳氢化合物排放。 本发明通过在直接控制针阀构件已经到达其关闭位置之前通过降低燃料压力来寻求更低的碳氢化合物排放，从而朝向喷射事件结束。 取决于特定的燃料喷射系统，包括在凸轮系统中溢出燃料压力或可能减轻增压器活塞上的压力，可以以多种方式实现降低燃料压力。 通过采用这种策略，在直接控制针阀构件到达其关闭位置之前，来自燃料喷射器的燃料喷射可以有效地结束，从而避免了由于当针移动时被少量的燃料推入燃烧空间而引起的碳氢化合物产生 其运动的最后部分朝向其关闭位置。
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公开(公告)号：US20050194462A1
公开(公告)日：2005-09-08
申请号：US10792169
申请日：2004-03-03
申请人： Dana Coldren , Mingchun Dong , Michael Huffman
发明人： Dana Coldren , Mingchun Dong , Michael Huffman
IPC分类号： F02M47/02
CPC分类号： F02M57/023 , F02M47/027 , F02M59/366 , F02M2547/008
摘要： An electronically controlled fuel injector includes a reduced part count and complexity over similar fuel injectors without a substantial reduction in performance capabilities. This is accomplished by using a one-piece needle that is hydraulically balanced and biased toward a closed position with a spring positioned in the needle control chamber. Although subtle, this injector has some ability to control the fuel pressure when the needle valve is opening and closing by adjusting a relative timing of a pressure control valve opening relative to a needle control chamber, using separate electrical actuators. The invention is particularly applicable to fuel injectors that cycle through high and low pressure states during and between injection events, respectively. Cam actuated fuel injectors being particularly well suited.
摘要翻译： 电子控制的燃料喷射器包括相对于类似的燃料喷射器的减少的部件数目和复杂性，而性能能力没有显着降低。 这是通过使用液压平衡的单件针并且通过设置在针控制室中的弹簧朝向关闭位置偏置来实现的。 虽然微妙，但是通过使用单独的电致动器调节针阀相对于针控制室的压力控制阀开口的相对定时，该喷射器具有一些能力来控制针阀打开和关闭时的燃料压力。 本发明特别适用于在喷射事件期间和之间分别在高压状态和低压状态下循环的燃料喷射器。 凸轮致动燃油喷射器特别适合。
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公开(公告)号：US07455243B2
公开(公告)日：2008-11-25
申请号：US10792169
申请日：2004-03-03
CPC分类号： F02M57/023 , F02M47/027 , F02M59/366 , F02M2547/008
摘要： An electronically controlled fuel injector includes a reduced part count and complexity over similar fuel injectors without a substantial reduction in performance capabilities. This is accomplished by using a one-piece needle that is hydraulically balanced and biased toward a closed position with a spring positioned in the needle control chamber. Although subtle, this injector has some ability to control the fuel pressure when the needle valve is opening and closing by adjusting a relative timing of a pressure control valve opening relative to a needle control chamber, using separate electrical actuators. The invention is particularly applicable to fuel injectors that cycle through high and low pressure states during and between injection events, respectively. Cam actuated fuel injectors being particularly well suited.
摘要翻译： 电子控制的燃料喷射器包括相对于类似的燃料喷射器的减少的部件数目和复杂性，而性能能力没有显着降低。 这是通过使用液压平衡的单件针并且通过设置在针控制室中的弹簧朝向关闭位置偏置来实现的。 虽然微妙，但是通过使用单独的电致动器调节针阀相对于针控制室的压力控制阀开口的相对定时，该喷射器具有一些能力来控制针阀打开和关闭时的燃料压力。 本发明特别适用于在喷射事件期间和之间分别在高压状态和低压状态下循环的燃料喷射器。 凸轮致动燃油喷射器特别适合。
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公开(公告)号：US20050150972A1
公开(公告)日：2005-07-14
申请号：US10755626
申请日：2004-01-12
申请人： Mingchun Dong , Dana Coldren , Daniel Ibrahim
发明人： Mingchun Dong , Dana Coldren , Daniel Ibrahim
CPC分类号： F02M61/205 , F02M57/02 , F02M59/366 , F02M63/0028
摘要： A fuel injector includes an auxiliary valve member that can assist in raising a mean injection pressure, increase a nozzle valve opening pressure, and hasten the closure rate of a nozzle valve member over an equivalent fuel injector without the auxiliary valve. The auxiliary valve member is fluidly positioned between a needle control chamber and a high pressure space, which includes a fuel pressurization chamber within the fuel injector. The auxiliary valve member includes a closing hydraulic surface exposed to fluid pressure in the high pressure space. The plumbing and the auxiliary valve member allow high pressure fuel to act upon a closing hydraulic surface of the nozzle valve member to increase valve opening pressure and mean injection pressure. The needle control chamber may be vented or may be a closed volume when the auxiliary valve member is in its closed position. The invention is potentially applicable to any fuel injector, but finds the preferred application in cam actuated fuel injectors that include an electronically controlled spill valve.
摘要翻译： 燃料喷射器包括辅助阀构件，其辅助提高平均喷射压力，增加喷嘴阀打开压力，并且加速喷嘴阀构件在不具有辅助阀的等效燃料喷射器上的关闭速率。 辅助阀构件流体地定位在针控制室和高压空间之间，其包括在燃料喷射器内的燃料加压室。 辅助阀构件包括在高压空间中暴露于流体压力的关闭液压表面。 管道和辅助阀构件允许高压燃料作用在喷嘴阀构件的关闭液压表面上以增加开阀压力和平均注射压力。 当辅助阀构件处于其关闭位置时，针控制室可以被排放或者可以是闭合的容积。 本发明潜在地适用于任何燃料喷射器，但是在凸轮致动的燃料喷射器中找到包括电子控制的溢流阀的优选应用。
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公开(公告)号：US06474296B2
公开(公告)日：2002-11-05
申请号：US09740436
申请日：2000-12-19
申请人： Sean O. Cornell , Scott A. Leman , David E. Martin , Ronald D. Shinogle , Virl R. Voights , Mingchun Dong
发明人： Sean O. Cornell , Scott A. Leman , David E. Martin , Ronald D. Shinogle , Virl R. Voights , Mingchun Dong
IPC分类号： F02D1304
CPC分类号： F01L1/267 , F01L1/20 , F01L9/02 , F01L13/06 , F01L13/065 , F01L2760/004
摘要： An actuator for adjusting a clearance between an end of a valve and an end of the actuator. The actuator has a piston therein having a central bore of which a portion is threaded. The piston has an end and has a flat defined near the end. The actuator has a stem member positioned therein. The stem member has a central portion which is threadedly positioned within the threaded portion of the central bore. The stem member defines a first end and a second end, and a threaded portion is located near the second end. The first end of the stem member and the end of the piston has a predetermined length which is adjustable. The predetermined length is adjusted by threadedly rotating the stem member relative to the piston. A locking device fixes the predetermined length during operation of the engine.
摘要翻译： 用于调节阀的端部和致动器的端部之间的间隙的致动器。 致动器具有其中具有中心孔的活塞，其中一部分是螺纹的。 活塞具有端部并且在端部附近具有限定的平面。 致动器具有定位在其中的杆构件。 杆构件具有螺纹地定位在中心孔的螺纹部分内的中心部分。 杆构件限定第一端和第二端，并且螺纹部位于第二端附近。 杆构件的第一端和活塞的端部具有可调节的预定长度。 预定长度通过相对于活塞螺纹地旋转杆构件来调节。 锁定装置在发动机运转期间固定预定长度。
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公开(公告)号：US20080315009A1
公开(公告)日：2008-12-25
申请号：US12229082
申请日：2008-08-20
CPC分类号： F02M57/023 , F02M47/027 , F02M59/366 , F02M2547/008
摘要： An electronically controlled fuel injector includes a reduced part count and complexity over similar fuel injectors without a substantial reduction in performance capabilities. This is accomplished by using a one-piece needle that is hydraulically balanced and biased toward a closed position with a spring positioned in the needle control chamber. Although subtle, this injector has some ability to control the fuel pressure when the needle valve is opening and closing by adjusting a relative timing of a pressure control valve opening relative to a needle control chamber, using separate electrical actuators. The disclosure is particularly applicable to fuel injectors that cycle through high and low pressure states during and between injection events, respectively. Cam actuated fuel injectors being particularly well suited.
摘要翻译： 电子控制的燃料喷射器包括相对于类似的燃料喷射器的减少的部件数目和复杂性，而性能能力没有显着降低。 这是通过使用液压平衡的单件针并且通过设置在针控制室中的弹簧朝向关闭位置偏置来实现的。 虽然微妙，但是通过使用单独的电致动器调节针阀相对于针控制室的压力控制阀开口的相对定时，该喷射器具有一些能力来控制针阀打开和关闭时的燃料压力。 本公开特别适用于分别在喷射事件期间和之间循环通过高压和低压状态的燃料喷射器。 凸轮致动燃油喷射器特别适合。
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公开(公告)号：US07134616B2
公开(公告)日：2006-11-14
申请号：US10755626
申请日：2004-01-12
CPC分类号： F02M61/205 , F02M57/02 , F02M59/366 , F02M63/0028
摘要： A fuel injector includes an auxiliary valve member that can assist in raising a mean injection pressure, increase a nozzle valve opening pressure, and hasten the closure rate of a nozzle valve member over an equivalent fuel injector without the auxiliary valve. The auxiliary valve member is fluidly positioned between a needle control chamber and a high pressure space, which includes a fuel pressurization chamber within the fuel injector. The auxiliary valve member includes a closing hydraulic surface exposed to fluid pressure in the high pressure space. The plumbing and the auxiliary valve member allow high pressure fuel to act upon a closing hydraulic surface of the nozzle valve member to increase valve opening pressure and mean injection pressure. The needle control chamber may be vented or may be a closed volume when the auxiliary valve member is in its closed position. The invention is potentially applicable to any fuel injector, but finds the preferred application in cam actuated fuel injectors that include an electronically controlled spill valve.
摘要翻译： 燃料喷射器包括辅助阀构件，其辅助提高平均喷射压力，增加喷嘴阀打开压力，并且加速喷嘴阀构件在不具有辅助阀的等效燃料喷射器上的关闭速率。 辅助阀构件流体地定位在针控制室和高压空间之间，其包括在燃料喷射器内的燃料加压室。 辅助阀构件包括在高压空间中暴露于流体压力的关闭液压表面。 管道和辅助阀构件允许高压燃料作用在喷嘴阀构件的关闭液压表面上以增加开阀压力和平均注射压力。 当辅助阀构件处于其关闭位置时，针控制室可以被排放或者可以是闭合的容积。 本发明潜在地适用于任何燃料喷射器，但是在凸轮致动的燃料喷射器中找到包括电子控制的溢流阀的优选应用。
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公开(公告)号：US06908040B2
公开(公告)日：2005-06-21
申请号：US10411808
申请日：2003-04-11
申请人： Mingchun Dong , Avtar S. Sandhu
发明人： Mingchun Dong , Avtar S. Sandhu
CPC分类号： F02M45/06 , F02M45/04 , F02M45/08 , F02M57/023
摘要： A unit injector assembly is provided that helps to ensure maximum injection flow while minimizing the harmful affects of pressure waves within the unit injector assembly. The unit injector assembly has a first fuel passageway extending from the plunger piston pumping chamber to the tip check stem injection chamber and valve seat. The unit injector assembly has a second fuel passageway extending from the tip check stem injection chamber to a fuel control valve assembly. A flow restricting fuel passageway connects one of the pumping chamber and the first fuel passageway with the second fuel passageway and acts to minimize cavitation at the valve seat and effectively eliminates pressure waves within the unit injector assembly.
摘要翻译： 提供了一种单元喷射器组件，其有助于确保最大喷射流量，同时最小化单元喷射器组件内的压力波的有害影响。 单元喷射器组件具有从柱塞活塞泵送室延伸到尖端检查杆注射室和阀座的第一燃料通道。 单元喷射器组件具有从尖端检查杆喷射室延伸到燃料控制阀组件的第二燃料通道。 流动限制燃料通道将泵送室和第一燃料通道中的一个与第二燃料通道连接，并且用于使阀座处的气蚀最小化并且有效地消除单元喷射器组件内的压力波。
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