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公开(公告)号：US5779220A
公开(公告)日：1998-07-14
申请号：US599538
申请日：1996-02-06
摘要： A valve assembly is disclosed for metering exhaust gas to the intake manifold of an internal combustion engine. The valve assembly has a base which includes a passage communicating between the intake manifold and the exhaust manifold of the engine. The passage has a valve seat which is operable with a valve member to meter the flow of exhaust gas through the passage to the intake manifold. An actuator assembly is mounted to the base and is operably connected to the valve member to move the valve member into and out of engagement with the valve seat. The actuator assembly includes a solenoid having a magnetic circuit comprising stationary primary and secondary pole pieces and a moveable armature. The primary pole piece includes an inner cylindrical wall operable to define, with the armature, a fixed radial gap for the passage of magnetic flux, and a tapered outer wall operable to increase the mass of the magnetic circuit, through which flux may pass, as the armature moves axially within cylindrical inner primary pole piece includes a n inwardly tapered, conical portion which operates, with an associated conical end of the moveable armature, to increase the axial opening force on the armature by establishing a secondary gap for the passage of magnetic flux as the armature approaches the conical tapered portion of the cylindrical wall. In addition, leakage flux is directed from said conical portion of said armature to said cylindrical inner wall across the entire range of motion of the armature to increase the axial force on said armature during operation of the valve.
摘要翻译： 公开了一种用于将废气排放到内燃机的进气歧管的阀组件。 阀组件具有基座，该基座包括在进气歧管和发动机的排气歧管之间连通的通道。 通道具有阀座，该阀座可与阀构件一起操作，以便通过通向进气歧管的通道来测量废气流。 致动器组件安装到基座并且可操作地连接到阀构件以将阀构件移动到与阀座接合和脱离与阀座的接合。 致动器组件包括具有磁路的螺线管，该磁路包括静止的初级和次级极片以及可移动的电枢。 主极片包括内圆柱壁，其可操作以与电枢一起限定用于磁通通过的固定径向间隙，以及锥形外壁，其可操作以增加磁通量通过的磁路的质量，如 电枢在圆柱形内部初级极片内轴向移动包括向内锥形的锥形部分，其与可移动电枢的相关联的锥形端一起操作，以通过建立用于磁通通过的次级间隙来增加电枢上的轴向开启力 当衔铁接近圆柱形壁的锥形锥形部分时。 此外，泄漏通量在衔铁的整个运动范围内从所述电枢的所述锥形部分引导到所述圆柱形内壁，以在阀的操作期间增加所述电枢上的轴向力。
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公开(公告)号：US06508416B1
公开(公告)日：2003-01-21
申请号：US09561574
申请日：2000-04-28
申请人： Noreen Louise Mastro , Jeffrey Mark Noll , David Wesley Rogers , Robert Halsall , Stephen Joel Harris , Anita Miriam Weiner
发明人： Noreen Louise Mastro , Jeffrey Mark Noll , David Wesley Rogers , Robert Halsall , Stephen Joel Harris , Anita Miriam Weiner
IPC分类号： B05B130
CPC分类号： F02M61/166 , F02M51/0639 , F02M51/0671
摘要： An electromagnetic fuel injector having improved wear characteristics comprises a body having a fuel inlet and a fuel outlet. A valve seat is sealably connected to the body, and a moveable valve member positioned at the fuel outlet for controlling the flow of fuel from the outlet comprises a valve outlet element that provides a sealing interface with the valve seat. The valve member and included valve outlet element further comprise wear surfaces that are subject to repeated impact and/or sliding contact; at least a portion of these wear surfaces comprise an applied layer of diamond-like carbon (DLC) stabilized by inclusion of greater than 30 weight percent of a carbide-forming material selected from the group consisting of silicon, titanium, and tungsten.
摘要翻译： 具有改进的磨损特性的电磁燃料喷射器包括具有燃料入口和燃料出口的主体。 阀座可密封地连接到主体，并且位于燃料出口处的用于控制来自出口的燃料流动的可移动阀构件包括提供与阀座的密封接口的阀出口元件。 阀构件和附带的阀出口元件还包括经受反复冲击和/或滑动接触的磨损表面; 这些磨损表面的至少一部分包括通过包含大于30重量％的选自硅，钛和钨的碳化物形成材料而稳定的金刚石样碳（DLC）的施加层。
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公开(公告)号：US5687698A
公开(公告)日：1997-11-18
申请号：US703149
申请日：1996-08-29
CPC分类号： H01F7/1607 , F02M26/53 , F02M26/48 , F02M26/67 , F02M26/72
摘要： An exhaust gas recirculation valve meters exhaust gas to the intake of an internal combustion engine. The valve includes an electromagnetic solenoid actuator having a magnetic circuit defined by a primary and a secondary pole piece. The pole pieces define an axial chamber in which is disposed an axially moveable armature and an associated valve member. The primary pole piece has a center pole member including a cylindrical inner wall which is open at a first end for receiving the armature. The armature and the cylindrical inner wall establish a fixed, radially extending primary air gap for flux passage while the outer wall extends in an outward taper from the first, open end of said center pole member and operates to increase the mass of the pole piece through which the magnetic circuit operates as the armature moves from the first, open end of the center pole member towards the second end. The secondary pole piece has a center pole member which includes a cylindrical inner wall, open at a first end for receiving the moveable armature and which is located in spaced opposing relationship to the first, open end of the primary pole to define a pole-to-pole gap therebetween. The armature and the cylindrical inner wall of the secondary pole define fixed, radially extending primary air gap for flux passage thereacross, and the outer wall extends in an outward taper from the first, open end. The outwardly tapering walls of primary and secondary poles operate to minimize the pole-to-pole gap through a minimization in opposing surface area therebetween allowing the length of the secondary pole and the surface area between secondary pole member and the armature to be maximized. The result is a minimization of the reluctance across said radial air gap and a maximization of the flux passage through the armature.
摘要翻译： 排气再循环阀将废气计量到内燃机的进气口。 该阀包括具有由初级和次级极片限定的磁路的电磁螺线管致动器。 极片限定轴向室，其中设置有可轴向移动的电枢和相关联的阀构件。 主极片具有中心极构件，该中心极构件包括在第一端开口以接收电枢的圆筒形内壁。 电枢和圆柱形内壁建立固定的，径向延伸的用于磁通通道的一次气隙，同时外壁从所述中心极构件的第一开口端以向外的锥形延伸，并且操作以增加极靴通过的质量 当电枢从中心极构件的第一开口端朝向第二端移动时磁路工作。 次级极片具有中心极构件，该中心极构件包括圆柱形内壁，在第一端处开放以接收可移动电枢，并且与主极的第一开口端隔开相对的关系，以限定极 - - 间隙。 电枢和第二极柱的圆柱形内壁限定了固定的径向延伸的一次气隙，用于通过其跨越，并且外壁从第一开口端以向外的锥形延伸。 初级和次级极的向外逐渐变细的壁的作用是通过相对的表面区域中的最小化使极极间隙最小化，从而允许次级极的长度和次级极构件和衔铁之间的表面积最大化。 结果是通过所述径向气隙的磁阻的最小化以及通过电枢的磁通通量的最大化。
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