DUAL FUEL SYSTEM HAVING DUAL FUEL INJECTOR AND ENGINE OPERATING METHOD

    公开(公告)号:WO2022169595A1

    公开(公告)日:2022-08-11

    申请号:PCT/US2022/012940

    申请日:2022-01-19

    申请人: CATERPILLAR INC.

    摘要: A dual fuel system (24) for an internal combustion engine (12) includes a first fuel supply (26) of a liquid pilot fuel, a primary fuel supply (34) of a liquid primary fuel, and a dual fuel injector (42). The dual fuel injector (42) includes a spill valve (78) fluidly connected with a plunger cavity (72) and movable to control a start of injection and an end of injection, and an admission valve (80). The admission valve (80) is movable to admit a pilot fuel into the fuel injector (42), such that the pilot fuel is conveyed through an outlet check (164) to form, within a primary fuel passage (66) fluidly connected to the plunger cavity (72), a segmented fuel charge of leading pilot fuel and trailing primary fuel by displacing some of the primary fuel. The liquid pilot fuel may be a higher cetane/lower octane liquid fuel, and the primary fuel may be a lower cetane/higher octane liquid fuel.

    VERFAHREN UND VORRICHTUNG ZUM BETREIBEN EINER BRENNKRAFTMASCHINE

    公开(公告)号:WO2019048132A1

    公开(公告)日:2019-03-14

    申请号:PCT/EP2018/070426

    申请日:2018-07-27

    申请人: ROBERT BOSCH GMBH

    摘要: Die Erfindung betrifft ein Verfahren zum Betreiben einer Brennkraftmaschine, bei dem ein gasförmiger und/oder flüssiger Brennstoff in einen Brennraum der Brennkraftmaschine eingespritzt wird bzw. werden und zum Einspritzen ein Brennstoffeinspritzventil verwendet wird, das zum Freigeben und Verschließen mindestens einer Einspritzöffnung eine hubbewegliche Düsennadel umfasst, die mit einer von einem Steuerdruck in einem Steuerraum abhängigen hydraulischen Schließkraft beaufschlagbar ist. Erfindungsgemäß wird beim Starten der Brennkraftmaschine mittels einer Pumpenanordnung ein Steuerdruck im Steuerraum aufgebaut, der während eines ersten Kompressionshubs eines den Brennraum begrenzenden Kolbens eine auf die Düsennadel wirkende hydraulische Schließkraft erzeugt, welche die Düsennadel gegen den ansteigenden Brennraumdruck geschlossen hält. Darüber hinaus betrifft die Erfindung eine Vorrichtung zur Durchführung des Verfahrens.

    FUEL SUPPLY SYSTEM FOR AN INTERNAL COMBUSTION ENGINE
    3.
    发明申请
    FUEL SUPPLY SYSTEM FOR AN INTERNAL COMBUSTION ENGINE 审中-公开
    内燃机燃油供应系统

    公开(公告)号:WO2015056045A1

    公开(公告)日:2015-04-23

    申请号:PCT/IB2013/003055

    申请日:2013-10-14

    申请人: RENAULT TRUCKS

    摘要: The invention relates to a fuel supply system for an internal combustion engine comprising: - a low pressure fuel pump (18); - a low pressure supply circuit (34) through which fuel is delivered by the low pressure pump (18) to one or several high pressure circuits (16), said low pressure supply circuit (34) comprising at least one delivery connection (36) for delivering fuel to the high pressure circuit(s) (16); - a pressure regulator (54) through which excess fuel from the low pressure supply circuit (34) is discharged through the pressure regulator (54) in a pump return circuit (56) which is fluidically connected to an input (20) of the low pressure pump (18) without passing through the fuel tank (14); characterized in that the pressure regulator (54) is located downstream of the delivery connection (36), and in that a fuel derivation circuit (60) is fluidically connected to the low pressure fuel supply circuit (34) downstream of the at least one delivery connection (36) to the high pressure circuit(s) and upstream of the pressure regulator (54).

    摘要翻译: 本发明涉及一种用于内燃机的燃料供应系统,包括: - 低压燃料泵(18); - 低压供应回路(34),低压供应回路(34),低压供应回路(34)包括至少一个输送连接(36), 用于将燃料输送到高压回路(16); - 压力调节器(54),通过所述压力调节器(54),其中来自所述低压供应回路(34)的多余燃料通过压力调节器(54)在泵回流回路(56)中排出,所述泵回流回路(56)流体连接到所述低压 不经过燃料箱(14)的压力泵(18); 其特征在于,所述压力调节器(54)位于所述输送连接件(36)的下游,并且燃料衍生回路(60)在所述至少一个输送器(36)的下游与所述低压燃料供应回路(34)流体连接 连接(36)到高压回路和压力调节器(54)的上游。

    内燃機関の燃料噴射装置
    4.
    发明申请
    内燃機関の燃料噴射装置 审中-公开
    用于内燃机的燃油喷射装置

    公开(公告)号:WO2013191042A1

    公开(公告)日:2013-12-27

    申请号:PCT/JP2013/066145

    申请日:2013-06-12

    IPC分类号: F02M55/02 F02M57/02 F02M59/44

    CPC分类号: F02D41/3809 F02D41/401

    摘要:  高圧燃料ポンプのスピル弁の駆動と燃料噴射弁の駆動のどちらか一方の作動音 によって他方の作動音が搭乗者に抑制されて聞こえるようにした内燃機関用燃料噴射制御 装置を提供することにある 燃料噴射弁の駆動に起因する作動音と高圧燃料ポンプのスピル弁の駆動に起 因する作動音を重複することなく高圧燃ポンプを駆動すると共に、燃料噴射弁の作動音に 基づいて定まる時間マスキング特性で決まる時間内に高圧燃料ポンプの作動音が発生する ようにした。人間の聴感覚に存在する時間マスキング効果を搭乗者に与えて、実際の作動 音は発生しているのに拘わらず見かけ上の静粛性を向上できる。

    摘要翻译: 其目的是提供一种用于内燃机的燃料喷射控制装置,其中使得高压燃料泵的溢流阀的驱动的操作噪声或燃料喷射阀的驱动的操作噪声对于 乘客以其他操作噪声抑制其中一个操作噪声的方式。 该设备被设计成使得高压燃料泵被驱动而不与来自燃料喷射阀的驱动的操作噪声和来自高压燃料泵的溢流阀的驱动的操作噪声重叠,并且 高压燃料泵的运行噪声在由基于燃料喷射阀的运行噪声而建立的时间掩蔽特性确定的时间内发生。 无论发生实际操作噪声,都可以将令人感觉到的时间掩蔽效应赋予乘客以提高表观沉默质量。

    HIGH-PRESSURE UNIT FUEL INJECTOR
    6.
    发明申请
    HIGH-PRESSURE UNIT FUEL INJECTOR 审中-公开
    高压单元燃油喷射器

    公开(公告)号:WO2011034806A1

    公开(公告)日:2011-03-24

    申请号:PCT/US2010/048581

    申请日:2010-09-13

    IPC分类号: F02M57/02

    CPC分类号: F02M57/026

    摘要: A check valve body (44) is disposed within the interior of a main body (32) of a fuel injector (30) and contains a continuous sealing ridge for sealing a perimeter of a cavity (124) between the proximal end face of the check valve body and the distal end face of an intensifier cartridge body (46). A spring cage (42) has a proximal end face disposed within the interior of the main body. An entry check (154) is disposed in an entry through-passage (132), and an exit check (156) is disposed in an exit through-passage (130). A continuous sealing ridge seals a perimeter of an exit cavity (140), and a discontinuous sealing ridge seals a portion of a perimeter of an entry cavity (144). The sealing ridges are asymmetric about a longitudinal axis AX.

    摘要翻译: 止回阀体(44)设置在燃料喷射器(30)的主体(32)的内部,并且包含用于密封支架的近端面之间的空腔(124)的周边的连续密封脊, 阀体和增压筒体(46)的远端面。 弹簧笼(42)具有设置在主体内部的近端面。 入口检查(154)设置在进入通道(132)中,并且出口检查(156)设置在出口通过通道(130)中。 连续的密封脊密封出口腔(140)的周边,并且不连续的密封脊密封入口腔(144)的周边的一部分。 密封脊围绕纵向轴线AX是不对称的。

    PIEZO INTENSIFIER FUEL INJECTOR AND ENGINE USING SAME
    8.
    发明申请
    PIEZO INTENSIFIER FUEL INJECTOR AND ENGINE USING SAME 审中-公开
    PIEZO INTENSIFIER燃油喷射器和使用它的发动机

    公开(公告)号:WO2009051675A1

    公开(公告)日:2009-04-23

    申请号:PCT/US2008/011681

    申请日:2008-10-10

    摘要: A common rail (18) fuel injection system includes a piezo intensifier fuel injector (14) that includes a plurality of components. Among these are a needle valve member (60), an intensifier piston (80), a first piezo stack electrical actuator (50) and a second piezo stack electrical actuator (51). These components have a first configuration at which the needle valve member (60) blocks a nozzle outlet (16) of the fuel injector (14), and a shoulder (87) of the intensifier piston (80) is exposed to fluid pressure in a common rail (18). The components have a second configuration at which the nozzle outlet (16) is fluidly connected to the common rail (18) for a low pressure injection event (A). The components have a third configuration at which the nozzle outlet (16) is fluidly blocked from the common rail (18), but movement of the intensifier displaces fluid through the nozzle outlet (16) for a high pressure injection event.

    摘要翻译: 共轨(18)燃料喷射系统包括包括多个部件的压电增强器燃料喷射器(14)。 其中包括针阀构件(60),增压器活塞(80),第一压电叠层电致动器(50)和第二压电叠层电致动器(51)。 这些部件具有第一构造,针阀构件(60)阻挡燃料喷射器(14)的喷嘴出口(16),并且增压器活塞(80)的肩部(87)暴露于流体压力 共轨(18)。 这些部件具有第二配置,在该第二配置处喷嘴出口(16)流体地连接到用于低压喷射事件(A)的共轨(18)。 这些部件具有第三构型,在该第三构型处,喷嘴出口16从共轨(18)流体地阻挡,但是增压器的运动使流体通过喷嘴出口(16)移动,用于高压注射事件。

    VAPOUR MEASUREMENT
    9.
    发明申请
    VAPOUR MEASUREMENT 审中-公开
    蒸气测量

    公开(公告)号:WO2009037489A2

    公开(公告)日:2009-03-26

    申请号:PCT/GB2008003205

    申请日:2008-09-22

    摘要: The present invention provides, with reference to Figure 1, an internal combustion engine (10) having a fuel injector which comprises a sprung piston (55) or a resilient diaphragm piston (8155) and an electrical coil (57, 8158) for displacing the piston (55, 8155). The piston draws fuel into and expels fuel from a pumping chamber (52, 8152). The number of operations of the injector per engine cycle is controlled by an electronic controller (23, 8159) to control the quality of fuel delivered per cycle to a combustion chamber. A voltage measured in the coil (52, 8158) by movement of the piston under action of the spring or due to its own resilience is used to give an indication of vapour pressure of the fuel. A device akin to the injector can be used to draw fuel from a pipeline to measure the vapour pressure of the fluid.

    摘要翻译: 参考图1,本发明提供一种具有燃料喷射器的内燃机(10),其包括弹簧活塞(55)或弹性隔膜活塞(8155)和电线圈(57,8158),用于使 活塞(55,8155)。 活塞将燃料吸入并排出来自泵送室(52,8152)的燃料。 每个发动机循环的喷射器的操作次数由电子控制器(23,8159)控制,以控制每个循环向燃烧室输送的燃料的质量。 使用通过活塞在弹簧作用下或由于其自身弹性的运动在线圈(52,8158)中测量的电压来给出燃料的蒸汽压力的指示。 类似于喷射器的装置可用于从管道中抽取燃料以测量流体的蒸气压。

    FUEL INJECTOR WITH BOOSTED NEEDLE CLOSURE
    10.
    发明申请
    FUEL INJECTOR WITH BOOSTED NEEDLE CLOSURE 审中-公开
    燃油喷射器与提升针封闭

    公开(公告)号:WO2008048566A1

    公开(公告)日:2008-04-24

    申请号:PCT/US2007/022019

    申请日:2007-10-16

    IPC分类号: F02M47/02 F02M57/02 F02M63/00

    摘要: Fuel injectors with boosted needle control providing controlled and rapid needle closure. Boost and drive pistons (66, 64) are provided for hydraulic actuation to controllably close the needle (38), with the boost piston (66) reaching a mechanical stop before the needle (38) reaches the closed position, with the drive piston (64) alone providing adequate hydraulic force to hold the needle (38) closed. In a preferred embodiment, fuel from the intensifier (20) is coupled to the top of the boost and drive pistons (66, 64) to close the needle (38), and controllably coupled to the bottom of the boost and drive pistons (66, 64) to allow pressure in the needle chamber to open the needle (38). Apparatus for control of fuel pressure to the bottom of the boost and drive pistons (66, 64) is disclosed.

    摘要翻译: 具有增压针控制功能的燃油喷射器提供受控且快速的针闭合。 提供增压和驱动活塞66,64用于液压致动以可控地关闭针38,其中增压活塞66在针38到达关闭位置之前达到机械止动, 仅仅提供足够的液压力来保持针(38)关闭。 在优选实施例中,来自增压器20的燃料联接到增压和驱动活塞66,64的顶部以关闭针38并可控制地联接到增压和驱动活塞66的底部 ,64)以允许针室中的压力打开针(38)。 公开了用于控制升压和驱动活塞(66,64)底部的燃料压力的装置。