HIGH PRESSURE UNIT FUEL INJECTOR HAVING VARIABLE EFFECTIVE SPILL AREA
    1.
    发明申请
    HIGH PRESSURE UNIT FUEL INJECTOR HAVING VARIABLE EFFECTIVE SPILL AREA 审中-公开
    高压单元燃油喷射器具有可变的有效泄漏区域

    公开(公告)号:WO1993020348A1

    公开(公告)日:1993-10-14

    申请号:PCT/US1993002599

    申请日:1993-03-31

    CPC classification number: F02M57/02 F02M59/30

    Abstract: A fuel injector (10) includes a plunger assembly (20) disposed within a central axial bore (18) and including a lower plunger (22), an intermediate plunger (24), and an upper plunger (26). The lower plunger (22) reciprocates to meter a variable quantity of fuel and to inject this fuel. A timing chamber (34) formed between the upper and intermediate plungers (26, 24) receives an amount of timing fluid to create a variable length hydraulic link between the plungers (26, 24). The fluid is drained from the chamber (34) through a drain passage (38) at the end of the injection cycle. In a preferred embodiment, the drain passage (38) is located along the central axis of the intermediate plunger (24), and the upper plunger (26) is provided with a projecting portion (29) which moves into position as the timing chamber (34) collapses to effectively constrict the drain passage (38), thus changing the timing fluid flow function to a function which provides greater fluid pressure in the timing chamber (34), maintaining a large downward force on the lower plunger (22) preventing additional, undesired fuel flow into the combustion chamber.

    Abstract translation: 燃料喷射器(10)包括设置在中心轴向孔(18)内并包括下柱塞(22),中间柱塞(24)和上柱塞(26)的柱塞组件(20)。 下部柱塞(22)往复运动以计量可变量的燃料并喷射该燃料。 形成在上部和中间柱塞(26,24)之间的定时室(34)接收一定量的定时流体以在柱塞(26,24)之间产生可变长度的液压连杆。 在注射循环结束时,流体从腔室(34)排出通过排放通道(38)。 在优选实施例中,排水通道(38)沿着中间柱塞(24)的中心轴线定位,并且上柱塞(26)设置有突出部分(29),该突出部分(29)作为定时室 34)塌缩以有效地收缩排水通道(38),从而将定时流体流动功能改变为在定时室(34)中提供更大流体压力的功能,在下部柱塞(22)上保持较大的向下的力,防止额外的 ,不期望的燃料流入燃烧室。

    HIGH PRESSURE UNIT FUEL INJECTOR HAVING VARIABLE EFFECTIVE SPILL AREA
    2.
    发明公开
    HIGH PRESSURE UNIT FUEL INJECTOR HAVING VARIABLE EFFECTIVE SPILL AREA 失效
    可变有效OVERFLOW截面的高压燃油泵喷嘴部件。

    公开(公告)号:EP0587884A1

    公开(公告)日:1994-03-23

    申请号:EP93921726.0

    申请日:1993-03-31

    CPC classification number: F02M57/02 F02M59/30

    Abstract: Un injecteur de carburant (10) comporte un ensemble piston plongeur (20), disposé dans une âme axiale centrale (18), qui comporte un plongeur inférieur (22), un plongeur intermédiaire (24) et un plongeur supérieur (26). Le plongeur inférieur (22) effectue un va-et-vient pour doser une quantité variable de carburant et l'injecter. Une chambre séquentielle (34), ménagée entre les plongeurs supérieur et intermédiaire (26, 24) reçoit une dose de fluide séquentiel destinée à créer une liaison hydraulique de longueur variable entre ces plongeurs (26, 24). Ce fluide s'écoule depuis la chambre (34) par une conduite (38) à la fin du cycle d'injection. Dans une variante préférée, la conduite (38) est située le long de l'axe central du plongeur intermédiaire (24) et le plongeur supérieur (26) est doté d'une saillie (29) qui se met en place quand la chambre séquentielle (34) se contracte pour obturer efficacement la conduite (38), ce qui modifie la fonction d'écoulement du fluide séquentiel en une fonction qui procure une pression de fluide supérieure dans la chambre séquentielle (34). Ceci permet de maintenir une force descendante importante sur le plongeur inférieur (22) afin d'éviter un écoulement de carburant supplémentaire et intempestif dans la chambre de combustion.

    HIGH PRESSURE UNIT FUEL INJECTOR HAVING VARIABLE EFFECTIVE SPILL AREA
    3.
    发明授权
    HIGH PRESSURE UNIT FUEL INJECTOR HAVING VARIABLE EFFECTIVE SPILL AREA 失效
    可变有效OVERFLOW截面的高压燃油泵喷嘴单元

    公开(公告)号:EP0587884B1

    公开(公告)日:1997-01-08

    申请号:EP93921726.1

    申请日:1993-03-31

    CPC classification number: F02M57/02 F02M59/30

    Abstract: A fuel injector (10) includes a plunger assembly (20) disposed within a central axial bore (18) and including a lower plunger (22), an intermediate plunger (24), and an upper plunger (26). The lower plunger (22) reciprocates to meter a variable quantity of fuel and to inject this fuel. A timing chamber (34) formed between the upper and intermediate plungers (26, 24) receives an amount of timing fluid to create a variable length hydraulic link between the plungers (26, 24). The fluid is drained from the chamber (34) through a drain passage (38) at the end of the injection cycle. In a preferred embodiment, the drain passage (38) is located along the central axis of the intermediate plunger (24), and the upper plunger (26) is provided with a projecting portion (29) which moves into position as the timing chamber (34) collapses to effectively constrict the drain passage (38), thus changing the timing fluid flow function to a function which provides greater fluid pressure in the timing chamber (34), maintaining a large downward force on the lower plunger (22) preventing additional, undesired fuel flow into the combustion chamber.

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