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1. 发明授权

US5518030A Three-way flow valve with variable drain orifice area 失效
标题翻译：具有可变排水口面积的三通流量阀
公开(公告)号：US5518030A
公开(公告)日：1996-05-21
申请号：US354287
申请日：1994-12-12
申请人： Chung Y. Liu , Benjamin M. Yen , Lester L. Peters , Julius P. Perr
发明人： Chung Y. Liu , Benjamin M. Yen , Lester L. Peters , Julius P. Perr
IPC分类号： F02M59/46 , F15B13/04 , F15B13/044 , F16K11/044 , F16K31/06
CPC分类号： F16K31/0627 , F02M59/466 , F15B13/0405 , F15B13/044 , F16K11/044 , F02M2200/04 , F15B2013/041 , Y10T137/86622 , Y10T137/86678 , Y10T137/86686
摘要： A solenoid valve for use in a fuel system includes a valve body with a central core and three interconnected passageways. A spool is disposed within the central core and by means of enlarged and reduced diameter portions controls the flow through the solenoid valve. Solenoid armatures cooperatively control movement of the valve spool which is sized and shaped so as to provide a fuel flow path from an inlet passageway to an outlet passageway when the solenoid valve is in an opened condition. When the spool is shifted to a closed condition, incoming fuel is blocked and a flow path is created from the output passageway to a drain passageway, The drain passageway allows excess fuel in the injector to drain to relieve fuel pressure on the metering plunger. As the spool moves from a closed condition to an opened condition, some fuel flows to the drain passageway. The amount of fuel "loss" depends on the speed of the spool and the size of the drain passageway. In order to avoid the higher cost associated with drilling a small diameter hole through the valve body, a larger drilled hole is used. The enlarged end of the valve spool is extended so as to block a substantial portion of the drain passageway orifice. The blocked orifice yields a smaller flow through area and this reduced flow orifice area reduces transition loss and cavitation.
摘要翻译：用于燃料系统的电磁阀包括具有中心芯的阀体和三个相互连接的通道。阀芯设置在中心芯内，并且通过放大和缩小的直径部分控制通过电磁阀的流量。螺线管电枢协调地控制阀芯的运动，该阀芯的尺寸和形状被设计成当电磁阀处于打开状态时提供从入口通道到出口通道的燃料流动路径。当阀芯移动到关闭状态时，进入的燃料被堵塞并且从输出通道到排水通道产生流动通道。排放通道允许喷射器中的过量燃料排出以减轻计量柱塞上的燃料压力。当阀芯从关闭状态移动到打开状态时，一些燃料流向排放通道。燃料“损失”的数量取决于阀芯的速度和排水通道的大小。为了避免与通过阀体钻出小直径孔相关联的较高成本，使用较大的钻孔。阀芯的扩大端部被延伸以阻塞排水通道孔口的大部分。堵塞的孔产生较小的流过面积，并且该减小的流动孔面积减小了过渡损失和空化。

2. 发明授权

US5619969A Fuel injection rate shaping control system 失效
标题翻译：燃油喷射率整形控制系统
公开(公告)号：US5619969A
公开(公告)日：1997-04-15
申请号：US563344
申请日：1995-11-28
申请人： Chung Y. Liu , Benjamin M. Yen , Lester L. Peters , Julius P. Perr , Russ P. Durrett , Donald N. Case , Dennis Ashwill , Chris Sorg , John Lane , Mark Cavanagh
发明人： Chung Y. Liu , Benjamin M. Yen , Lester L. Peters , Julius P. Perr , Russ P. Durrett , Donald N. Case , Dennis Ashwill , Chris Sorg , John Lane , Mark Cavanagh
IPC分类号： F02M37/00 , F02M41/16 , F02M45/12 , F02M55/02 , F02M57/02 , F02M59/08 , F02M59/46 , F02M63/00 , F02M7/00 , F02M37/04
CPC分类号： F02M63/0007 , F02M41/16 , F02M45/12 , F02M55/02 , F02M57/025 , F02M59/08 , F02M63/0003 , F02M63/0015 , F02M2200/30
摘要： A fuel injection rate shaping control system is provided which effectively controls the flow rate of fuel injected into the combustion chamber of an engine to improve combustion and reduce emissions by controlling the rate of pressure increase during injection. The injection rate shaping control system includes a rate shaping control device including a rate shaping transfer passage having a predetermined length and diameter specifically designed to create a desired injection pressure rate shape. In other embodiments of the present invention, two or more rate shaping transfer passages capable of producing distinct rate shapes are packaged in various fuel injection systems to selectively provide various rate shapes depending on operating conditions. Switching valves, i.e., solenoid operated three-way valves, may be used to direct the fuel or timing fluid flow to any one of the rate shaping transfer passages. Also, a dampening means in the form of a reverse flow restrictor valve is positioned in the rate shaping transfer passage to dampen reflected pressure waves thereby minimizing the adverse effects thereof.
摘要翻译：提供一种燃料喷射率成形控制系统，其有效地控制喷射到发动机的燃烧室中的燃料的流量，以通过控制喷射期间的压力增加率来改善燃烧并减少排放。喷射率成形控制系统包括速率成形控制装置，其包括具有预定长度和直径的速率整形传送通道，其特别设计成产生所需的喷射压力速率形状。在本发明的其它实施例中，能够产生不同速率形状的两个或更多个速率成形传送通道被包装在各种燃料喷射系统中，以根据操作条件选择性地提供各种速率形状。切换阀，即电磁操作的三通阀，可用于将燃料或正时流体流引导到速率整形传递通道中的任一个。此外，反流限流阀形式的阻尼装置位于速率整形传递通道中以阻尼反射压力波，从而使其不利影响最小化。

3. 发明授权

US5894992A Hydraulically actuated fuel injector with injection rate shaping pressure intensifier 失效
标题翻译：具有喷射率成形压力增压器的液压致动燃油喷射器
公开(公告)号：US5894992A
公开(公告)日：1999-04-20
申请号：US682966
申请日：1996-07-18
申请人： Chung Y. Liu , Amarjit S. Ghuman , Benjamin M. Yen , Lester L. Peters , Edward D. Smith
发明人： Chung Y. Liu , Amarjit S. Ghuman , Benjamin M. Yen , Lester L. Peters , Edward D. Smith
IPC分类号： F02M45/00 , F02M45/06 , F02M57/02 , F02M59/10 , F02M47/02
CPC分类号： F02M57/026 , F02M45/00 , F02M45/063 , F02M57/025 , F02M59/105
摘要： Fuel injection rate shaping is integrated into the pressure intensification stage of a hydraulically actuated fuel injector having a pressure intensifier. In a first embodiment, the pressure intensification plunger is formed of two parts creating a damping chamber therebetween from which fluid is forced out through orifices in a lower one of the plunger parts during an initial phase of displacement of the upper part. Thus, injection will be performed initially at a lower pressure and rate, which increases once the plunger parts make contact. In a second embodiment, a throttled flow is set via a restrictor housing that telescopingly receives the upper plunger part, so that a lower injection rate occurs while fluid is bled off through a restricted flow path between the restrictor housing and the upper plunger part, and a higher injection rate is produced once a port in the upper plunger clears the restrictor housing. In a third embodiment, the two plunger parts of the intensifier have different areas relative to each other. In a fourth embodiment, flow to the intensifier plunger is varied by the intensifier plunger co-acting with a shaped inlet port increasing the effective area of the inlet port through which flow enters the intensifier as the intensifier plunger is displaced during its injection stroke. In a fifth embodiment, a throttling effect produced by a clearance between a protrusion on the intensifier plunger and a receiving bore in the intensifier body is used reduce the intensification effect during the initial phase of injection.
摘要翻译：燃料喷射率成形被集成到具有压力增强器的液压致动燃料喷射器的增压阶段中。在第一实施例中，压力增强柱塞由两部分形成，在其之间形成阻尼室，在上部位移的初始阶段期间，流体被迫通过下部一个柱塞部件中的孔排出。因此，首先将以较低的压力和速率进行喷射，一旦柱塞部件接触就增加。在第二实施例中，通过可伸缩地容纳上部柱塞部件的限制器壳体设置节流流动，使得当流体通过限制器壳体和上部柱塞部件之间的受限制的流动路径流出时，发生较低的喷射速率，以及一旦上柱塞中的端口清除限流器壳体，就产生较高的喷射速率。在第三实施例中，增压器的两个柱塞部分相对于彼此具有不同的区域。在第四实施例中，到增压器柱塞的流动由增强器柱塞与成形入口端口一起作用而变化，当增压器柱塞在其注入冲程期间位移时，增加器柱塞增加了入口的有效面积，通过该入口入口进入增压器。在第五实施例中，通过增压器柱塞上的突起与增压体之间的接收孔之间的间隙产生的节流效应用于降低注射初始阶段的强化效应。

4. 发明授权

US07194863B2 Turbine speed control system and method 有权
标题翻译：涡轮调速系统及方法
公开(公告)号：US07194863B2
公开(公告)日：2007-03-27
申请号：US10931694
申请日：2004-09-01
申请人： Evgeni Ganev , Mike S. Koerner , Chung Y. Liu
发明人： Evgeni Ganev , Mike S. Koerner , Chung Y. Liu
IPC分类号： F02C9/16 , F02C9/26
CPC分类号： F02C9/28 , Y02T50/671 , Y10T137/87314
摘要： One embodiment of the invention provides a turbine control system that adjusts the control thresholds of two-position valves, which provide propellant to the turbine, based on turbine load so as to compensate for increased turbine speed overshoot at low load and the increased turbine speed undershoot at high load. These two-position on-off modulated valves are used in a bang-bang (fully open or fully closed) regulation scheme to eliminate or minimize speed droop by using variable speed bounds implemented as a function of load.
摘要翻译：本发明的一个实施例提供了一种涡轮机控制系统，其基于涡轮机负载来调节向涡轮机提供推进剂的两位置阀的控制阈值，以补偿在低负载下增加的涡轮速度过冲和增加的涡轮转速下冲在高负载下。这两个位置开关调节阀用于一个爆炸（全开或全闭合）调节方案，通过使用作为负载的函数实现的可变速度界限来消除或最小化速度下降。

5. 外观设计

USD347956S Backrest for park benches 失效
公开(公告)号：USD347956S
公开(公告)日：1994-06-21
申请号：US7006
申请日：1993-04-14
申请人： Chung Y. Liu
设计人： Chung Y. Liu

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