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。

公开(公告)号：US4962743A

公开(公告)日：1990-10-16

申请号：US362266

申请日：1989-06-06

申请人： Julius P. Perr ,  Eric Liang ,  Robert C. Yu ,  Amarjit S. Ghuman

发明人： Julius P. Perr ,  Eric Liang ,  Robert C. Yu ,  Amarjit S. Ghuman

IPC分类号： F02M57/02 ,  F02M59/10

CPC分类号： F02M57/023 ,  F02M57/021 ,  F02M59/102

摘要： A cam for controlling the injection rate of fuel in a fuel injection system having a four part cam profile is disclosed. The first 120.degree. is the plunger advancement segment. The next 80.degree. is the advanced dwell segment. The next 100.degree. is the plunger retraction segment and the last 60.degree. is the retracted dwell segment. The plunger advancement segment is divided into three subsegments: pre-injection stroke, injection stroke, and overtravel stroke. The pre-injection subsegment achieves minimum velocity and acceleration at the start of injection. In the injection subsegment, the cam follower acceleration is achieved as rapidly as can Hertz stress permits to increase the injection pressure and to achieve the maximum injection rate. The overtravel subsegment achieves a sharp and clean end of injection. Preferably, this cam causes injection of less than 20 mm.sup.3 of fuel per stroke during the first ten cam angle degrees of cam rotation. The injection pressure and the amount of injection are reduced at the beginning of injection, timing is advanced, and optimal control over the rate of fuel injection is provided.

摘要翻译： 公开了一种用于控制具有四部分凸轮轮廓的燃料喷射系统中的燃料喷射速率的凸轮。 第一个120度是柱塞前进段。 接下来的80度是先进的停留段。 接下来的100°是柱塞回缩段，最后60°是缩回的停留段。 柱塞前进段分为三个子部分：预注射冲程，注射冲程和超程冲程。 预注射子段在注射开始时达到最小速度和加速度。 在喷射子段中，凸轮从动件的加速度能够像赫兹应力允许的那样快速地实现，以增加喷射压力并达到最大喷射速率。 超行程段实现了清晰的清洁注射结束。 优选地，该凸轮在凸轮旋转的第一十个凸轮角度期间引起每冲程少于20mm 3的燃料喷射。 在注射开始时注射压力和注射量减少，提前时间，并提供对燃料喷射速率的最佳控制。

公开(公告)号：US6067946A

公开(公告)日：2000-05-30

申请号：US767091

申请日：1996-12-16

申请人： Byron J. Bunker ,  Amarjit S. Ghuman ,  Rod Radovanovic ,  John M. Janssen

发明人： Byron J. Bunker ,  Amarjit S. Ghuman ,  Rod Radovanovic ,  John M. Janssen

IPC分类号： F01L9/02 ,  F16K31/122

CPC分类号： F01L9/02 ,  F16K31/1221 ,  Y10T137/0318

摘要： A system and a method for hydraulic actuation of poppet valves. The poppet valve is opened by application of hydraulic pressure to a piston, and is closed by action of a mechanical spring. Hydraulic pressure comes from either a high pressure source of a low pressure source, the low pressure source being higher than ambient pressure. Application of hydraulic pressure is made by a pressure control device based upon signals received from an electronic controller. Hydraulic pressure is applied in a way that minimizes the power required to actuate the valve by making use of valve inertia.

摘要翻译： 一种用于提升阀液压启动的系统和方法。 提升阀通过向活塞施加液压而打开，并通过机械弹簧的作用而关闭。 液压来自低压源的高压源，低压源高于环境压力。 基于从电子控制器接收的信号，通过压力控制装置进行液压的应用。 施加液压的方法是通过利用阀的惯性来最小化驱动阀所需的功率。

公开(公告)号：US5937807A

公开(公告)日：1999-08-17

申请号：US050033

申请日：1998-03-30

申请人： Lester L. Peters ,  David A. Vittorio ,  P. Douglas Free ,  Amarjit S. Ghuman ,  Harold G. Weber ,  Canden R. Nelson

发明人： Lester L. Peters ,  David A. Vittorio ,  P. Douglas Free ,  Amarjit S. Ghuman ,  Harold G. Weber ,  Canden R. Nelson

IPC分类号： F01L13/00

CPC分类号： F01L13/0031 ,  F01L1/181 ,  F01L1/26 ,  F01L13/06

摘要： An exhaust valve system for an internal combustion engine including a turbocharger is provided for effectively increasing the turbocharged boost pressure at low load engine conditions thereby effectively improving engine transient response. The exhaust valve system includes an exhaust valve control device operable in a normal timing mode for permitting normal opening of one or more exhaust valves at a normal opening crank angle, and in an advanced timing mode for advancing the timing of the opening of the exhaust valve to an advanced opening crank angle prior to the normal opening crank angle while maintaining the timing of normal closing of the exhaust valves at a normal closing crank angle. In one embodiment, the exhaust valve control device includes a tappet and an actuating fluid supply which operate to move the tappet between expanded and collapsed states to advance the opening of the exhaust valve while permitting normal exhaust valve lift to be introduced prior to peak exhaust valve lift thereby maintaining the normal peak lift and the normal timing of exhaust valve closure. In a second embodiment, the exhaust valve control device includes a dedicated advanced timing mode rocker lever capable of selectively actuating one of a pair of exhaust valves to create an early opening exhaust event prior to a normal exhaust event.

摘要翻译： 提供一种用于包括涡轮增压器的内燃机的排气门系统，用于在低负载发动机条件下有效地增加涡轮增压增压压力，从而有效地改善发动机瞬态响应。 排气门系统包括排气门控制装置，该排气门控制装置可以在正常定时模式下操作，以允许一个或多个排气门以正常的开启曲柄角正常打开，并且在提前定时模式中，用于使排气门的打开时间延长 在正常的开启曲柄角之前达到先进的开启曲柄角，同时保持排气门在正常的关闭曲柄角处的正常关闭的正时。 在一个实施例中，排气门控制装置包括挺杆和致动流体供应器，其操作以在膨胀和收缩状态之间移动挺杆，以推进排气门的打开，同时允许在峰值排气阀之前引入正常的排气门升程 从而保持正常的峰值升程和排气门关闭的正常时间。 在第二实施例中，排气门控制装置包括专用的高级定时模式摇杆杆，其能够选择性地致动一对排气门中的一个，以在正常排气事件之前产生早期打开排气事件。

公开(公告)号：US5713335A

公开(公告)日：1998-02-03

申请号：US659619

申请日：1996-06-06

申请人： Julius P. Perr ,  Lester L. Peters ,  Amarjit S. Ghuman ,  Benjamin M. Yen ,  Edward D. Smith ,  David L. Buchanan ,  Yul J. Tarr ,  Laszlo D. Tikk ,  Andrew G. Stiles

发明人： Julius P. Perr ,  Lester L. Peters ,  Amarjit S. Ghuman ,  Benjamin M. Yen ,  Edward D. Smith ,  David L. Buchanan ,  Yul J. Tarr ,  Laszlo D. Tikk ,  Andrew G. Stiles

IPC分类号： F01L13/00 ,  F02D1/16 ,  F02D1/18 ,  F02M57/02 ,  F02M59/10 ,  F02M37/04

CPC分类号： F02D1/16 ,  F01L13/0063 ,  F02D1/183 ,  F02M57/023 ,  F02M59/102

摘要： In accordance with preferred embodiments of the invention a timing adjustment device includes a cam follower that is engaged between an overhead cam and an injector rocker arm, and is mounted on a rotatable eccentric shaft. The geometry of the eccentric shaft and cam follower is designed so that, as timing is varied by rotation of the eccentric shaft, no change is produced in the vertical height of the rocker arm when the cam shaft is on the outer base circle and the injector is bottomed, in order to assure that the "mechanical crush" of the PT type injector is constant despite changes in timing. In a first application of the timing arrangement, it is used together with a simple injector, which does not utilize a multi-plunger arrangement to form a hydraulic link, to achieve lower parasitic losses. To obtain independent control over injection pressure and timing, a fuel injector in which a hydraulic link is formed between plungers of a multi-plunger arrangement is used with the timing arrangement in order to allow the injection pressure to be maintained constant over a wide range of engine speeds without interfering with engine timing.

摘要翻译： 根据本发明的优选实施例，定时调节装置包括凸轮从动件，其接合在顶置凸轮和喷射器摇臂之间，并安装在可旋转的偏心轴上。 偏心轴和凸轮从动件的几何形状被设计成使得当定时通过偏心轴的旋转而变化时，当凸轮轴在外基圆上时，在摇臂的垂直高度上不产生变化，并且喷射器 是为了确保PT型喷射器的“机械挤压”在时间上有变化时是恒定的。 在定时装置的第一应用中，它与简单的喷射器一起使用，其不利用多柱塞装置来形成液压连杆，以实现更低的寄生损耗。 为了获得对喷射压力和时间的独立控制，在定时装置中使用其中在多柱塞装置的柱塞之间形成液压连杆的燃料喷射器，以便允许喷射压力在宽范围内保持恒定 发动机转速，而不会干扰发动机定时。

公开(公告)号：US4901531A

公开(公告)日：1990-02-20

申请号：US149850

申请日：1988-01-29

申请人： Isoroku Kubo ,  Amarjit S. Ghuman

发明人： Isoroku Kubo ,  Amarjit S. Ghuman

IPC分类号： F01K23/06 ,  F02B3/06 ,  F02G5/02 ,  F02G5/04

CPC分类号： F02G5/02 ,  F01K23/065 ,  F02G5/04 ,  F02B3/06 ,  F02B37/00 ,  F02G2262/00 ,  Y02T10/166

摘要： A system is provided for increasing the efficiency of internal combustion engines operating at high loads and more particularly to a multi-cylinder engine in which at least one cylinder is used as the power recovery device. The waste heat generated during operation of the engine is utilized for producing an amount of energy to perform the work by means of a Rankine cycle.

摘要翻译： 提供了一种用于提高在高负载下运行的内燃机的效率的系统，更具体地涉及其中使用至少一个气缸作为动力回收装置的多气缸发动机。 在发动机运行期间产生的废热用于产生一定量的能量以通过兰金循环进行工作。