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    FUEL INJECTOR
    2.
    发明申请
    FUEL INJECTOR 审中-公开
    喷油器

    公开(公告)号：WO2013104782A1

    公开(公告)日：2013-07-18

    申请号：PCT/EP2013/050535

    申请日：2013-01-14

    Applicant: DELPHI TECHNOLOGIES HOLDING S.À.R.L. ,  LIMMER, Andrew ,  HARDY, Christopher ,  LUCK, Joseph

    Inventor： LIMMER, Andrew ,  HARDY, Christopher ,  LUCK, Joseph

    IPC: F02M47/02 ,  F02M63/00

    CPC classification number: F02M69/048 ,  F02M47/027 ,  F02M63/0035 ,  F02M63/0047 ,  F02M2200/28

    Abstract: A fuel injector for use in a fuel system for an internal combustion engine is disclosed. The fuel injector comprises a supply means (24, 24a) for high pressure fuel, an injection nozzle (25) including a valve needle (26) which is engageable with a valve needle seating (28) to control fuel delivery from the injector, a surface associated with the valve needle (26) being exposed to fuel pressure within a control chamber (42), a first filling flow path (44) providing flow from the supply means (24) into the control chamber (42), and a control valve (48) for controlling fuel pressure within the control chamber (42). The control valve (48) comprises a valve housing (80) that defines, in part, a first valve chamber (104) and a second valve chamber (106), and a control valve member (60) slidable within a guide bore (86) of the valve housing (80). The injector further comprises a drain flow path (50) including a drain restriction (50a) and permitting flow from the control chamber (42) to the second valve chamber (106) when the control valve member (60) is in the second state, and a second filling flow path (47) permitting flow from the first valve chamber (104) into the control chamber (42) when the control valve member (60) is in the first state, wherein the second filling flow path (47) bypasses the drain restriction (50a). The drain flow path (50) and the second filling flow path (47) are formed within the valve housing (80).

    Abstract translation: 公开了一种用于内燃机燃料系统的燃油喷射器。 燃料喷射器包括用于高压燃料的供给装置（24,24a），包括可与阀针座（28）接合以控制从喷射器输送燃料的阀针（26）的喷嘴（25） 与阀针（26）相关联的表面暴露于控制室（42）内的燃料压力的第一填充流路（44），提供从供给装置（24）流入控制室（42）的流动;以及控制 用于控制所述控制室（42）内的燃料压力的阀（48）。 控制阀（48）包括部分限定第一阀室（104）和第二阀室（106）的阀壳体（80）和可在导向孔（86）内滑动的控制阀构件 ）的阀壳体（80）。 当控制阀构件（60）处于第二状态时，喷射器还包括排水流路（50），该排水流路（50）包括排水限制（50a）并且允许从控制室（42）流到第二阀室（106） 以及当控制阀构件（60）处于第一状态时允许从第一阀室（104）流入控制室（42）的第二填充流路（47），其中第二填充流路（47）绕过 排水限制（50a）。 排水流路（50）和第二填充流路（47）形成在阀壳体（80）内。

    Fuel injector
    3.
    发明公开
    Fuel injector 审中-公开
    喷油器

    公开(公告)号：EP2615294A1

    公开(公告)日：2013-07-17

    申请号：EP12151087.9

    申请日：2012-01-13

    Applicant: Delphi Technologies Holding S.à.r.l.

    Inventor： LIMMER, Andrew ,  HARDY, Christopher ,  LUCK, Joseph

    IPC: F02M47/02 ,  F02M63/00

    CPC classification number: F02M69/048 ,  F02M47/027 ,  F02M63/0035 ,  F02M63/0047 ,  F02M2200/28

    Abstract: A fuel injector offering improved accuracy of fuel delivery is described. The fuel injector comprises a supply means (24, 24a) for high pressure fuel, an injection nozzle (25) including a valve needle (26), a control chamber (42) for the valve needle, a first filling flow path (44) providing flow from the supply means (24) into the control chamber (42), and a control valve (48) for controlling fuel pressure within the control chamber (42). The control valve (48) comprises a first valve chamber (104) and a second valve chamber (106), and a control valve member (60) operable between a first state in which the first valve chamber (104) communicates with the supply means (24), and in which flow between the second valve chamber (106) and a low-pressure drain (21) is prevented, and a second state in which flow between the first valve chamber (104) and the supply means (24) is prevented, and in which the second valve chamber (106) is in communication with the low-pressure drain (21). The fuel injector further comprises a drain flow path (50) including a drain restriction (50a) and permitting flow from the control chamber (42) to the second valve chamber (106) when the control valve member (60) is in the second state, and a second filling flow path (47) permitting flow from the first valve chamber (104) into the control chamber (42) when the control valve member (60) is in the first state, wherein the second filling flow path (47) bypasses the drain restriction (50a). The drain restriction (50a) comprises an orifice.

    Abstract translation: 描述了提供燃料输送精度提高的燃料喷射器。 燃料喷射器包括用于高压燃料的供应装置（24,24a），包括阀针（26）的喷嘴（25），用于阀针的控制室（42），第一填充流动路径（44） 提供从供应装置（24）流入控制室（42）的流量和用于控制控制室（42）内的燃料压力的控制阀（48）。 控制阀（48）包括第一阀室（104）和第二阀室（106）以及控制阀构件（60），该控制阀构件可在第一状态和第二状态之间操作，在第一状态中，第一阀室（104）与供应装置 （24）流动，并且在第二阀室（106）和低压排放口（21）之间的流动被阻止，并且在第二阀室（104）和供应装置（24）之间流动的第二状态中， 并且其中第二阀室（106）与低压排放口（21）连通。 所述燃料喷射器还包括排放流动路径（50），所述排放流动路径包括排放限制部（50a），并且当所述控制阀构件（60）处于所述第二状态时允许从所述控制室（42）流向所述第二阀室（106） ，以及当控制阀构件（60）处于第一状态时允许从第一阀室（104）流入控制室（42）的第二填充流动路径（47），其中第二填充流动路径（47） 绕过排放限制（50a）。 排放限制部分（50a）包括孔口。

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