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    • 6. 发明授权
    • Metering servovalve and fuel injector for an internal combustion engine
    • 用于内燃机的计量伺服阀和燃油喷射器
    • US07784711B2
    • 2010-08-31
    • US12023793
    • 2008-01-31
    • Mario RiccoRaffaele RiccoSergio StucchiDomenico LeporeCarlo Mazzarella
    • Mario RiccoRaffaele RiccoSergio StucchiDomenico LeporeCarlo Mazzarella
    • F02M47/00
    • F02M47/027F02M63/004F02M63/008F02M2200/07F02M2200/9069F02M2547/003Y10S239/19
    • A fuel injector and servovalve for an internal combustion engine. In one embodiment, the fuel injector comprises a casing; a balanced metering servovalve in the casing that controls movement of an injection control rod along an axial cavity; said servovalve having; a valve body comprising a control chamber; an axial stem comprising a discharge channel having at least one radial segment that runs to a lateral surface of said axial stem; a calibrated inlet passage in communication with said control chamber; and an outlet passage in communication with said control chamber and the discharge channel; a sleeve having a shutter, said axial stem extending into said sleeve in a fluid tight manner and so that said sleeve that can axially slide along said axial stem between a closed position and an open position of said at least one radial segment, thereby controlling said movement of said injection control rod along said axial cavity; an electro-actuator having an armature that controls said axial sliding of said sleeve along said axial stem; an elastic member that exerts a force upon said armature that maintains said sleeve in said closed position, said electro-actuator being able to control said armature to overcome said force of said elastic member; and said armature being separate from said sleeve.
    • 燃油喷射器和内燃机的伺服阀。 在一个实施例中,燃料喷射器包括壳体; 壳体中的平衡计量伺服阀控制注射控制杆沿轴向腔的运动; 所述伺服阀具有; 阀体,包括控制室; 轴向杆,包括具有至少一个径向段的排放通道,所述至少一个径向段延伸到所述轴向杆的侧表面; 与所述控制室连通的校准入口通道; 以及与所述控制室和所述排出通道连通的出口通道; 具有快门的套筒,所述轴向杆以流体密封的方式延伸到所述套筒中,并且使得所述套筒可沿着所述轴向轴线在所述至少一个径向段的关闭位置和打开位置之间轴向滑动,从而控制所述 所述注射控制杆沿所述轴向腔的运动; 电致动器,其具有控制所述套筒沿着所述轴杆的所述轴向滑动的电枢; 弹性构件,其将所述电枢施加力保持在所述闭合位置,所述电致动器能够控制所述电枢克服所述弹性构件的所述力; 并且所述电枢与所述套筒分离。
    • 7. 发明申请
    • METERING SERVOVALVE AND FUEL INJECTOR FOR AN INTERNAL COMBUSTION ENGINE
    • 用于内燃机的计量服务器和燃油喷射器
    • US20090032621A1
    • 2009-02-05
    • US12023793
    • 2008-01-31
    • Mario RiccoRaffaele RiccoSergio StucchiDomenico LeporeCarlo Mazzarella
    • Mario RiccoRaffaele RiccoSergio StucchiDomenico LeporeCarlo Mazzarella
    • F02M61/16
    • F02M47/027F02M63/004F02M63/008F02M2200/07F02M2200/9069F02M2547/003Y10S239/19
    • A fuel injector and servovalve for an internal combustion engine. In one embodiment, the fuel injector comprises a casing; a balanced metering servovalve in the casing that controls movement of an injection control rod along an axial cavity; said servovalve having; a valve body comprising a control chamber; an axial stem comprising a discharge channel having at least one radial segment that runs to a lateral surface of said axial stem; a calibrated inlet passage in communication with said control chamber; and an outlet passage in communication with said control chamber and the discharge channel; a sleeve having a shutter, said axial stem extending into said sleeve in a fluid tight manner and so that said sleeve that can axially slide along said axial stem between a closed position and an open position of said at least one radial segment, thereby controlling said movement of said injection control rod along said axial cavity; an electro-actuator having an armature that controls said axial sliding of said sleeve along said axial stem; an elastic member that exerts a force upon said armature that maintains said sleeve in said closed position, said electro-actuator being able to control said armature to overcome said force of said elastic member; and said armature being separate from said sleeve.
    • 燃油喷射器和内燃机的伺服阀。 在一个实施例中,燃料喷射器包括壳体; 壳体中的平衡计量伺服阀控制注射控制杆沿轴向腔的运动; 所述伺服阀具有; 阀体,包括控制室; 轴向杆,包括具有至少一个径向段的排放通道,所述至少一个径向段延伸到所述轴向杆的侧表面; 与所述控制室连通的校准入口通道; 以及与所述控制室和所述排出通道连通的出口通道; 具有快门的套筒,所述轴向杆以流体密封的方式延伸到所述套筒中,并且使得所述套筒可沿着所述轴向轴线在所述至少一个径向段的关闭位置和打开位置之间轴向滑动,从而控制所述 所述注射控制杆沿所述轴向腔的运动; 电致动器,其具有控制所述套筒沿着所述轴杆的所述轴向滑动的电枢; 弹性构件,其将所述电枢施加力保持在所述闭合位置,所述电致动器能够控制所述电枢克服所述弹性构件的所述力; 并且所述电枢与所述套筒分离。