Structure of fuel injector adjustable in fuel jet characteristic

    公开(公告)号:US06409094B1

    公开(公告)日:2002-06-25

    申请号:US09801817

    申请日:2001-03-09

    IPC分类号: F02D106

    摘要: A fuel injector is provided which has an improved structure capable of adjusting fuel jet characteristics such as the quantity of fuel to be injected to an engine and a fuel injection time lag after the fuel injector is assembled. The fuel injector includes an air gap adjusting screw and a spring pressure adjusting screw. The air gap adjusting screw serves to change an air gap between a stator and an armature of a solenoid valve to adjust the quantity of fuel to a target one. The spring pressure adjusting screw serves to change a spring pressure urging a valve in a spray hole-closing direction to regulate a spray hole open duration, thereby adjusting the fuel injection time lag or the quantity of fuel.

    Fuel injection system for an internal combustion engine
    5.
    发明授权
    Fuel injection system for an internal combustion engine 失效
    内燃机燃油喷射系统

    公开(公告)号:US5036821A

    公开(公告)日:1991-08-06

    申请号:US432676

    申请日:1989-11-07

    摘要: A fuel injection system for an internal combustion engine, wherein a spill valve device operated by a piezoelectric unit is provided for carrying out a pressure pump spill operation when a fuel injection stroke is completed. The spill valve device includes a operating chamber connected to a sealed chamber of the piezoelectric unit, the sealed chamber being connected to a fuel supplementing passageway which is connected to a fuel passageway connecting a fuel tank with a fuel intake port of the pressure pump. The pressure pump is further provided with a spill passageway for discharging pressurized fuel in the pressure chamber via the fuel passageway. A check valve is provided in the fuel passageway to prevent a flow of the spilled fuel to the sealed chamber of the piezoelectric unit.

    摘要翻译: 一种用于内燃机的燃料喷射系统,其中,设置由压电单元操作的溢流阀装置,用于在燃料喷射冲程完成时进行压力泵溢出操作。 泄漏阀装置包括连接到压电单元的密封室的操作室,密封室连接到燃料补充通道,燃料补充通道连接到将燃料箱与压力泵的燃料进口连接的燃料通道。 压力泵还设置有用于经由燃料通道排出压力室中的加压燃料的溢流通道。 在燃料通道中设置止回阀,以防止溢出的燃料流到压电单元的密封室。

    Fuel injection valve
    6.
    发明授权
    Fuel injection valve 有权
    燃油喷射阀

    公开(公告)号:US07770818B2

    公开(公告)日:2010-08-10

    申请号:US12010794

    申请日:2008-01-30

    IPC分类号: F02M41/16

    摘要: A fuel injection valve includes a housing having a wall surface on an opposite side of the nozzle hole. A fuel passage opens in the wall surface, and communicates with a nozzle hole through a nozzle cavity. The nozzle cavity accommodates a valve element. A cylinder is substantially in contact with the wall surface at one end, and slidably accommodating one end of the valve element. The cylinder partitions the nozzle cavity substantially into a fuel accumulator chamber and a pressure control chamber. The fuel accumulator chamber accumulates fuel supplied from the fuel passage. The pressure control chamber accumulates fuel for manipulating the valve element. The cylinder has an outer wall defining a deflecting surface for radially outwardly deflecting fuel flowing from the fuel passage.

    摘要翻译: 燃料喷射阀包括在喷嘴孔的相对侧上具有壁表面的壳体。 燃料通道在壁表面开口,并通过喷嘴腔与喷嘴孔连通。 喷嘴腔容纳阀元件。 气缸在一端基本上与壁表面接触,并且可滑动地容纳阀元件的一端。 气缸将喷嘴腔基本上分成燃料储存室和压力控制室。 燃料蓄积器室积聚从燃料通道供应的燃料。 压力控制室积聚用于操纵阀元件的燃料。 气缸具有限定用于径向向外偏转从燃料通道流出的燃料的偏转表面的外壁。

    Fuel injection valve
    7.
    发明申请
    Fuel injection valve 有权
    燃油喷射阀

    公开(公告)号:US20080191062A1

    公开(公告)日:2008-08-14

    申请号:US12010794

    申请日:2008-01-30

    IPC分类号: F02M61/16

    摘要: A fuel injection valve includes a housing having a wall surface on an opposite side of the nozzle hole. A fuel passage opens in the wall surface, and communicates with a nozzle hole through a nozzle cavity. The nozzle cavity accommodates a valve element. A cylinder is substantially in contact with the wall surface at one end, and slidably accommodating one end of the valve element. The cylinder partitions the nozzle cavity substantially into a fuel accumulator chamber and a pressure control chamber. The fuel accumulator chamber accumulates fuel supplied from the fuel passage. The pressure control chamber accumulates fuel for manipulating the valve element. The cylinder has an outer wall defining a deflecting surface for radially outwardly deflecting fuel flowing from the fuel passage.

    摘要翻译: 燃料喷射阀包括在喷嘴孔的相对侧上具有壁表面的壳体。 燃料通道在壁表面开口,并通过喷嘴腔与喷嘴孔连通。 喷嘴腔容纳阀元件。 气缸在一端基本上与壁表面接触,并且可滑动地容纳阀元件的一端。 气缸将喷嘴腔基本上分成燃料储存室和压力控制室。 燃料蓄积器室积聚从燃料通道供应的燃料。 压力控制室积聚用于操纵阀元件的燃料。 气缸具有限定用于径向向外偏转从燃料通道流出的燃料的偏转表面的外壁。

    Accumulator fuel injection apparatus for internal combustion engine
    8.
    发明授权
    Accumulator fuel injection apparatus for internal combustion engine 失效
    内燃机蓄能燃油喷射装置

    公开(公告)号:US6027037A

    公开(公告)日:2000-02-22

    申请号:US975397

    申请日:1997-11-20

    摘要: An accumulator fuel injection apparatus for an internal combustion engine is provided which includes a solenoid-operated fuel injector. The fuel injector includes a solenoid valve and a needle valve. The solenoid valve establishes and blocks fluid communication between a pressure control chamber supplied with fuel pressure from a fuel inlet and a drain passage formed in a valve body to change fuel pressure within the pressure control chamber, thereby bringing the needle valve into engagement with and disengagement from a spray hole. The fuel injector also has a first orifice disc and a second orifice disc installed within the valve body. The first orifice disc has formed therein a first orifice which provides a first flow resistance to fuel flowing from the fuel inlet into the pressure control chamber. Similarly, the second orifice disc has formed therein a second orifice which provides a second flow resistance smaller than the first flow resistance to the fuel flowing out of the pressure control chamber into the drain passage. The second orifice disc is disposed on the first orifice disc so that thicknesswise directions thereof coincide with each other.

    摘要翻译: 提供一种用于内燃机的蓄能器燃料喷射装置,其包括电磁操作的燃料喷射器。 燃料喷射器包括电磁阀和针阀。 电磁阀建立并阻止在供应有来自燃料入口的燃料压力的压力控制室和形成在阀体中的排放通道之间的流体连通,以改变压力控制室内的燃料压力,从而使针阀与接合和分离 从喷孔。 燃料喷射器还具有安装在阀体内的第一孔盘和第二孔盘。 第一孔板在其中形成有第一孔口,其向从燃料入口流入压力控制室的燃料提供第一流动阻力。 类似地,第二孔盘在其中形成有第二孔口,其向从压力控制室流出到排出通道中的燃料提供小于第一流动阻力的第二流动阻力。 第二孔盘设置在第一孔盘上,使得其厚度方向彼此一致。

    Fuel injection system for engine
    9.
    发明授权
    Fuel injection system for engine 失效
    发动机燃油喷射系统

    公开(公告)号:US5699770A

    公开(公告)日:1997-12-23

    申请号:US748780

    申请日:1996-11-14

    摘要: An accumulator fuel injection system for a diesel engine is provided which is designed to facilitates easy maintenance of an injector and may be used in different types of engines. The accumulator fuel injection system includes generally an injector, a solenoid valve for controlling injection timing, a connector supplying the power to the solenoid valve, a fuel supply pipe connection, and a fuel supply passage. The injector is installed in the engine to have an injector head disposed outside an engine head cover. The solenoid valve is disposed within the injector head eccentrically with the longitudinal center line of the injector. The connector is mounted on the injector head. The fuel supply connection is arranged opposite the injection nozzle across camshafts of exhaust and intake valves of the engine. The fuel supply passage is formed in a side wall of the injector head of said injector.

    摘要翻译: 提供了一种用于柴油发动机的蓄能器燃料喷射系统,其被设计成便于容易地维护喷射器并且可以用于不同类型的发动机。 蓄能器燃料喷射系统通常包括喷射器,用于控制喷射正时的电磁阀,向电磁阀供电的连接器,燃料供应管连接和燃料供给通道。 喷射器安装在发动机中以具有设置在发动机罩盖外部的喷射头。 电磁阀以喷射器的纵向中心线偏心地设置在喷射头内。 连接器安装在注射器头上。 燃料供应连接件布置成与注射喷嘴相对,穿过发动机排气和进气门的凸轮轴。 燃料供给通道形成在所述喷射器的喷射头的侧壁中。