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    VARIABLE DISPLACEMENT HIGH PRESSURE PUMP FOR COMMON RAIL FUEL INJECTION SYSTEMS
    1.
    发明申请
    VARIABLE DISPLACEMENT HIGH PRESSURE PUMP FOR COMMON RAIL FUEL INJECTION SYSTEMS 审中-公开
    用于普通铁路燃油喷射系统的可变位移高压泵

    公开(公告)号：WO1994027039A1

    公开(公告)日：1994-11-24

    申请号：PCT/US1994005107

    申请日：1994-05-06

    Applicant: CUMMINS ENGINE COMPANY, INC.

    Inventor： CUMMINS ENGINE COMPANY, INC. ,  YEN, Bai-Mao ,  PETERS, Lester, L. ,  PERR, Julius, P. ,  SWANK, Bryan, W.

    IPC: F02M07/00

    CPC classification number: F04B9/06 ,  F02D2041/225 ,  F02M41/16 ,  F02M45/04 ,  F02M45/12 ,  F02M51/00 ,  F02M55/02 ,  F02M55/025 ,  F02M59/30 ,  F02M59/34 ,  F02M59/36 ,  F02M59/44 ,  F02M59/46 ,  F02M59/466 ,  F02M63/00 ,  F02M63/0003 ,  F02M63/0007 ,  F02M63/0008 ,  F02M63/0225 ,  F04B2205/05 ,  F04B2205/15

    Abstract: A variable displacement high pressure pump having a plurality of high pressure pumping units which receive fuel from a low pressure fuel pump. A rotary cam-driven roller tappet, for producing pumping displacement of the pumping plunger of a respective pumping element, is connected to the pumping plunger by a separated link in a manner permitting the pumping plunger to float relative to the roller tappet during at least a portion of each pumping cycle. As a result, the capacity of the pumping chamber can be limited to an extent that is less than the full stroke achievable by the pumping plunger being retracted to the maximum extent which is permitted by the driving cam. In this way, the quantity of fuel to be pressurized and injected into the common rail does not have to be determined by a cutting-off of a spilling flow of excess metered fuel during the compression stroke of the pumping plunger, so that a low pressure solenoid valve can be used, in the case of time-stroke and time-pressure metering, and no solenoid is required to control metering in the case of pressure-time metering.

    Abstract translation: 一种具有多个从低压燃料泵接收燃料的高压泵送单元的可变排量高压泵。 用于产生相应泵送元件的泵送柱塞的泵送位移的旋转凸轮驱动辊挺杆通过分离的连杆以一种允许泵柱塞相对于辊挺杆浮动的方式连接到泵送柱塞，在至少一个 每个泵送循环的一部分。 结果，泵送室的容量可以被限制在小于由泵驱动柱塞缩回到由驱动凸轮允许的最大程度而可实现的全行程的程度。 以这种方式，在泵送柱塞的压缩行程期间，加压和注入共轨的燃料的量不必通过切断多余计量燃料的溢出流来确定，从而使得低压 在时间行程和时间压力计量的情况下，可以使用电磁阀，并且在压力测量的情况下不需要电磁阀来控制计量。

    FUEL INJECTION RATE SHAPING CONTROL SYSTEM
    2.
    发明申请
    FUEL INJECTION RATE SHAPING CONTROL SYSTEM 审中-公开
    燃油喷射速率成形控制系统

    公开(公告)号：WO1996041945A1

    公开(公告)日：1996-12-27

    申请号：PCT/US1996010137

    申请日：1996-06-11

    Applicant: CUMMINS ENGINE COMPANY, INC.

    Inventor： CUMMINS ENGINE COMPANY, INC. ,  LIU, Chung, Y. ,  YEN, Benjamin, M. ,  PETERS, Lester, L. ,  PERR, Julius, P. ,  DURRETT, Russ, P. ,  CASE, Donald, N. ,  ASHWILL, Dennis ,  SORG, Chris ,  LANE, John ,  CAVANAGH, Mark

    IPC: F02M37/04

    CPC classification number: F02M63/0007 ,  F02M41/16 ,  F02M45/12 ,  F02M55/02 ,  F02M57/025 ,  F02M59/08 ,  F02M63/0003 ,  F02M63/0015 ,  F02M2200/30

    Abstract: 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 (10) including a rate shaping transfer passage (22) 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 (72, 74) 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 (76, 84, 86), 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 (26) is positioned in the rate shaping transfer passage to dampen reflected pressure waves thereby minimizing the adverse effects thereof.

    Abstract translation: 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（10），其包括具有预定长度和直径的速率整形传送通道（22），其特别设计成产生所需的喷射压力比形状。 在本发明的其他实施例中，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（72,74）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（76,84,86）可以用于将燃料或正时流体流引导到任何一个速率整形传递通道。 而且，反向限流阀（26）形式的阻尼装置位于速率整形传递通道中，以阻尼反射的压力波，从而使其不利影响最小化。

    OPEN NOZZLE FUEL INJECTOR HAVING DRIVE TRAIN WEAR COMPENSATION
    3.
    发明申请
    OPEN NOZZLE FUEL INJECTOR HAVING DRIVE TRAIN WEAR COMPENSATION 审中-公开
    具有驱动火花磨损补偿的开启喷嘴燃油喷射器

    公开(公告)号：WO1997006364A1

    公开(公告)日：1997-02-20

    申请号：PCT/US1996012543

    申请日：1996-08-08

    Applicant: CUMMINS ENGINE COMPANY, INC.

    Inventor： CUMMINS ENGINE COMPANY, INC. ,  PETERS, Lester, L. ,  PERR, Julius, P. ,  TARR, Yul, J.

    IPC: F02M37/04

    CPC classification number: F02M57/024 ,  F02M57/021 ,  F02M59/102

    Abstract: A cam operated open nozzle fuel injector (12) is provided comprising a reciprocating plunger assembly including an outer plunger (32), an inner plunger (36) and a variable volume timing chamber (52) located between the plungers. A hold down force generating means includes a cam having a hold down cam or ramp portion (106) for maintaining the inner plunger in an innermost position against the inner end of the injector body with a sufficient hold down force during each hold down period throughout injector operation independently of injector train wear. The hold down cam portion operates to move the outer plunger inwardly towards the inner plunger throughout a substantial portion of the hold down period. The hold down cam portion functions to compensate for fuel drainage from the timing chambers so as to maintain a predetermined pressure in the timing chamber corresponding to a desired hold down force.

    Abstract translation: 提供一种凸轮操作的开口喷嘴燃料喷射器（12），其包括往复式柱塞组件，该往复式柱塞组件包括位于柱塞之间的外柱塞（32），内柱塞（36）和可变容积定时室（52）。 压紧力产生装置包括具有压紧凸轮或斜坡部分（106）的凸轮，用于在内部柱塞的最内部位置处保持内柱塞抵靠喷射器主体的内端，并且在每个压紧周期期间具有足够的压紧力 操作独立于喷油器列车磨损。 压紧凸轮部分操作以在整个保持期的大部分期间将外柱塞向内移动到内柱塞。 压紧凸轮部分用于补偿来自定时室的燃料排放，以便在对应于期望的压下力的情况下保持定时室中的预定压力。

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