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1. 发明授权

US07124744B2 Variable control orifice member and fuel injector using same 有权
标题翻译：变量控制孔构件和使用其的燃油喷射器
公开(公告)号：US07124744B2
公开(公告)日：2006-10-24
申请号：US10631291
申请日：2003-07-31
申请人： Norval J. Weimken , Xinshuang Nan , Ye Tian , Lifeng Wang , Jianyuan Yang , Ronald D. Shinogle , Chetan J. Desai
发明人： Norval J. Weimken , Xinshuang Nan , Ye Tian , Lifeng Wang , Jianyuan Yang , Ronald D. Shinogle , Chetan J. Desai
IPC分类号： F02M37/04
CPC分类号： F02M57/025 , F02M47/027 , F02M61/161
摘要： Engineers have determined that the ability to front end rate shape injection events can result in a number of advantages, including improved injector performance and a reduction in undesirable emissions. In addition, engineers have learned that it is desirable for the needle valve to open slowly at the beginning of an injection event and to close abruptly to end the injection event. Therefore, the present invention utilizes at least one orifice member that is movably positioned in an injector body such that fluid flowing away from the needle valve member closing hydraulic surface flows through a relatively restricted flow path and fluid flowing toward the needle valve member flow through a relatively unrestricted flow path.
摘要翻译：工程师已经确定，前端速率形状喷射事件的能力可以产生许多优点，包括改进的喷射器性能和减少不期望的排放。此外，工程师们了解到，针阀在注射事件开始时缓慢打开，并突然关闭以结束注射事件。因此，本发明使用至少一个可移动地定位在喷射器主体中的孔口构件，使得从针阀构件闭合液压表面流出的流体流过相对受限制的流动路径，并且流向针阀构件的流体流过相对无限制的流路。

2. 发明授权

US06467391B2 Hydraulic device with anti-stiction features 失效
公开(公告)号：US06467391B2
公开(公告)日：2002-10-22
申请号：US09740696
申请日：2000-12-19
申请人： Chetan J. Desai , Xinshuang Nan
发明人： Chetan J. Desai , Xinshuang Nan
IPC分类号： F15B1304
CPC分类号： F02M57/026 , F02M57/025 , F02M59/105 , F02M59/44 , F16J1/08
摘要： In hydraulically actuated fuel injectors that utilize lubricating oil as the actuation fluid, various components within the injector body must move relatively short distances at high rates of speed in a wetted oil environment. When the oil is at a relatively low temperature, its relatively high viscosity coupled with relatively small size of these components can cause stiction problems to occur. Stiction occurs where the moveable component comes in contact with the body when it rests against its stop. The highly viscous oil can tend to cause the component to resist breaking free of its stop surface such that the fuel injector may be inhibited in performing adequately, especially during cold start conditions. These potential stiction problems are reduced by including a raised surface feature on one or both of the component and body in order to reduce the potential contact surface area.

3. 发明授权

US06412705B1 Hydraulically-actuated fuel injector having front end rate shaping capabilities and fuel injection system using same 有权
标题翻译：具有前端速率整形能力的液压致动燃料喷射器和使用其的燃料喷射系统
公开(公告)号：US06412705B1
公开(公告)日：2002-07-02
申请号：US09566714
申请日：2000-05-09
申请人： Chetan J. Desai , Xinshuang Nan
发明人： Chetan J. Desai , Xinshuang Nan
IPC分类号： F02M4702
CPC分类号： F02M45/066 , F02M57/025
摘要： A hydraulically actuated fuel injection system according to the present invention comprises at least one hydraulically actuated fuel injector that includes an injector body that defines a fuel pressurization chamber. A pumping element having a stepped top is movably mounted in a pumping bore defined by the injector body, wherein the pumping element defines at least one internal passageway. The pumping element is movable a distance between a first position and a second position. A spill passage defined by the injector body is open to the fuel pressurization chamber via the at least one internal passageway over a portion of the distance.
摘要翻译：根据本发明的液压致动燃料喷射系统包括至少一个液压致动燃料喷射器，其包括限定燃料加压室的喷射器主体。具有台阶顶部的泵送元件可移动地安装在由喷射器主体限定的泵送孔中，其中泵送元件限定至少一个内部通道。泵送元件可在第一位置和第二位置之间移动一定距离。由喷射器主体限定的溢流通道经由该距离的一部分上的至少一个内部通道对燃料加压室开放。

4. 发明授权

US06408821B1 Fuel injection system with common actuation device and engine using same 失效
标题翻译：具有通用致动装置的燃油喷射系统和使用其的发动机
公开(公告)号：US06408821B1
公开(公告)日：2002-06-25
申请号：US09740533
申请日：2000-12-19
申请人： Chetan J. Desai , Xinshuang Nan
发明人： Chetan J. Desai , Xinshuang Nan
IPC分类号： F02M4702
CPC分类号： F02M63/0005 , F02D41/3809 , F02M45/00 , F02M45/02 , F02M45/04 , F02M47/02 , F02M47/022 , F02M47/027 , F02M63/0225
摘要： The present invention relates to engines having common rail fuel injection systems. In traditional common rail fuel injection systems, each fuel injector utilized by the fuel system includes its own solenoid. These individual solenoids must cooperate to ensure that the proper amount of fuel is being injected from each injector at the proper time. It is believed in the art that a reduction in the number of moving or electrical components in the fuel injection system can improve robustness of the system. Therefore, the fuel injection system of the present invention includes fuel injectors that are controlled in operation by a common electronic actuator that is positioned remote from the fuel injectors.
摘要翻译：本发明涉及具有共轨燃料喷射系统的发动机。在传统的共轨燃料喷射系统中，由燃料系统使用的每个燃料喷射器包括其自己的螺线管。这些单独的螺线管必须配合以确保在适当的时间从每个喷射器喷射适量的燃料。在本领域中相信，燃料喷射系统中的移动或电气部件的数量的减少可以提高系统的鲁棒性。因此，本发明的燃料喷射系统包括通过远离燃料喷射器定位的公共电子致动器来操作的燃料喷射器。

5. 发明授权

US06520151B2 Fuel injection system with common actuation device and engine using same 失效
公开(公告)号：US06520151B2
公开(公告)日：2003-02-18
申请号：US09974285
申请日：2001-10-10
申请人： Chetan J. Desai , Xinshuang Nan
发明人： Chetan J. Desai , Xinshuang Nan
IPC分类号： F02M4702
CPC分类号： F02M63/0005 , F02D41/3809 , F02M45/00 , F02M45/02 , F02M45/04 , F02M47/02 , F02M47/022 , F02M47/027 , F02M63/0225
摘要： The present invention relates to engines having common rail fuel injection systems. In traditional common rail fuel injection systems, each fuel injector utilized by the fuel system includes its own solenoid. These individual solenoids must cooperate to ensure that the proper amount of fuel is being injected from each injector at the proper time. Having individual solenoids requires a multiple number of moving electrical components. In contrast to the traditional common rail fuel injection system, the fuel injection system of the present invention includes fuel injectors that are controlled in operation by a common electronic actuator that is positioned remote from the fuel injectors. Therefore, the present invention reduces the number of moving electrical components in the fuel injection system by reducing the need for individual solenoids for each fuel injector.

6. 发明授权

US06568369B1 Common rail injector with separately controlled pilot and main injection 有权
标题翻译：共轨喷油器具有独立控制的先导和主喷射
公开(公告)号：US06568369B1
公开(公告)日：2003-05-27
申请号：US09729880
申请日：2000-12-05
申请人： Chetan J. Desai , Xinshaung Nan
发明人： Chetan J. Desai , Xinshaung Nan
IPC分类号： F02M4100
CPC分类号： F02M57/025 , F02M45/04 , F02M45/08 , F02M47/022 , F02M59/105 , F02M63/0225
摘要： The present invention relates to common rail fuel injectors, and includes an example of such an injector, a fuel injection system employing such an injector, and a method of injecting fuel. The fuel injector includes an injector body, a fuel pressurization chamber, a nozzle chamber, a needle control chamber, a needle control spill outlet, a fuel inlet, and a nozzle outlet. The present fuel injection system includes a source of intermediate pressure fuel, a low pressure fuel reservoir, a needle valve, a flow control valve, and at least one of the present fuel injectors. The method of injecting fuel consists of the steps of injecting fuel at an intermediate pressure at least in part by fluidly connecting the injector's nozzle chamber to an intermediate fuel source, and injecting fuel at a high pressure at least in part by exposing a pressure intensifying element to the source of intermediate pressure fuel.
摘要翻译：本发明涉及共轨燃料喷射器，并且包括这种喷射器的示例，使用这种喷射器的燃料喷射系统以及喷射燃料的方法。燃料喷射器包括喷射器主体，燃料加压室，喷嘴室，针控制室，针控制溢出口，燃料入口和喷嘴出口。本燃料喷射系统包括中压燃料源，低压燃料储存器，针阀，流量控制阀以及至少一个本燃料喷射器。喷射燃料的方法包括以下步骤：至少部分地通过将喷射器的喷嘴室流体地连接到中间燃料源来在中压下喷射燃料，并且至少部分地通过暴露加压元件到中压燃料的来源。

7. 发明授权

US5950931A Pressure decay passage for a fuel injector having a trapped volume nozzle assembly 失效
标题翻译：具有捕获体积喷嘴组件的燃料喷射器的压力衰减通道
公开(公告)号：US5950931A
公开(公告)日：1999-09-14
申请号：US16150
申请日：1998-01-30
申请人： David J. Beatty , Chetan J. Desai , George M. Matta
发明人： David J. Beatty , Chetan J. Desai , George M. Matta
IPC分类号： F02M57/02 , F02M61/20 , F02M45/00
CPC分类号： F02M61/205 , F02M57/02
摘要： A fuel injector includes an injector body that defines a low pressure space, a trapped volume and a fuel pressurization chamber in fluid communication with a nozzle outlet. A needle valve member is positioned in the injector body and moveable between an inject position in which the fuel pressurization chamber is opened to the nozzle outlet, and a closed position in which the nozzle outlet is blocked to the fuel pressurization chamber. The needle valve member includes a lifting hydraulic surface exposed to fluid pressure in the fuel pressurization chamber, and a closing hydraulic surface exposed to fluid pressure in the trapped volume. At least one of the injector body and the needle valve member define a pressure decay passage extending between the trapped volume and the low pressure space.
摘要翻译：燃料喷射器包括限定低压空间，被捕集体积和与喷嘴出口流体连通的燃料加压室的喷射器主体。针阀构件定位在喷射器主体中，并且能够在燃料加压室与喷嘴出口打开的喷射位置和喷嘴出口被封闭到燃料加压室的关闭位置之间移动。针阀构件包括暴露于燃料加压室中的流体压力的提升液压表面和暴露于被捕获体积中的流体压力的关闭液压表面。喷射器主体和针阀构件中的至少一个限定了在被捕获的体积和低压空间之间延伸的压力衰减通道。

8. 发明授权

US06298827B1 Method and system to monitor and control the activation stage in a hydraulically actuated device 有权
标题翻译：用于监测和控制液压致动装置中的活化阶段的方法和系统
公开(公告)号：US06298827B1
公开(公告)日：2001-10-09
申请号：US09521285
申请日：2000-03-08
申请人： Chetan J. Desai , David L. Fuelberth
发明人： Chetan J. Desai , David L. Fuelberth
IPC分类号： F02M3304
CPC分类号： F02M59/105 , F02M57/025 , F02M59/466 , F02M2200/24
摘要： A method of adjusting performance of an electronically controlled hydraulic system comprises the initial step of providing at least one electronically controlled hydraulic device having a control valve member operably coupled to an electronic actuator. The control valve member impacts a seat when the device is activated and de-activated. The electronically controlled hydraulic device is then activated according to an activation profile. The seat impacts of the control valve member are detected and recorded. The detected seat impact characteristics are compared to expected seat impact characteristics. A subsequent activation profile is then changed if the detected seat impact characteristics are substantially different from the expected seat impact characteristics
摘要翻译：一种调节电子控制液压系统的性能的方法包括提供至少一个电子控制的液压装置的初始步骤，所述液压装置具有可操作地耦合到电子致动器的控制阀构件。当该装置被激活并被去激活时，控制阀构件撞击座椅。然后根据激活曲线激活电子控制的液压装置。检测并记录控制阀构件的座椅冲击。将检测到的座椅冲击特性与预期的座椅冲击特性进行比较。如果检测到的座椅撞击特性与预期的座椅撞击特性有显着差异，则随后的激活曲线被改变

9. 发明授权

US5515829A Variable-displacement actuating fluid pump for a HEUI fuel system 失效
标题翻译：用于HEUI燃油系统的可变排量致动流体泵
公开(公告)号：US5515829A
公开(公告)日：1996-05-14
申请号：US247168
申请日：1994-05-20
申请人： Jerry A. Wear , Chetan J. Desai , Michael A. Flinn , Scott F. Shafer
发明人： Jerry A. Wear , Chetan J. Desai , Michael A. Flinn , Scott F. Shafer
IPC分类号： F02B75/18 , F02B75/22 , F02M57/02 , F02M59/10 , F02M63/02 , F04B1/32 , F04B49/08 , F02M47/02 , F04B1/34
CPC分类号： F04B1/324 , F02B75/22 , F02M57/025 , F02M59/105 , F04B49/08 , F02B2075/1832
摘要： A pressure control system for controlling output pressure of a variable-displacement hydraulic pump used with a hydraulically-actuated electronically-controlled injector fuel system and method of operation is disclosed. The control system comprises a variable-displacement hydraulic pump with a control element adjustable to a range of positions which controls an output of the pump. The control system additionally includes positioning means for positioning the control element responsive to pressure differences between the fluid reference chamber and the output port. Electronic valve means regulates a pressure of hydraulic actuating fluid in the fluid reference chamber. The electronic valve means is electronically connected with the electronic control means to receive the output signal. A change in the output signal to the electrical valve means produces a change in the pressure of the hydraulic actuating fluid in the fluid reference chamber, thereby causing the positioning means to operably position the control element to change the output of the pump.
摘要翻译：公开了一种用于控制与液压致动电控喷射器燃料系统一起使用的可变排量液压泵的输出压力的压力控制系统和操作方法。控制系统包括一个可变排量的液压泵，其具有可控制到泵的输出的一定范围的控制元件。控制系统还包括用于响应于流体参考室和输出端口之间的压力差定位控制元件的定位装置。电子阀装置调节流体参考室中的液压致动流体的压力。电子阀装置与电子控制装置电连接以接收输出信号。对电动阀装置的输出信号的变化产生液体致动流体在流体参考室中的压力变化，从而使定位装置可操作地定位控制元件以改变泵的输出。

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