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    • 3. 发明申请
    • Connection Head Structure of High Pressure Fuel Injection Tube
    • 高压燃油喷射管连接头结构
    • US20090151701A1
    • 2009-06-18
    • US12335663
    • 2008-12-16
    • Nobuo KatoKoichi HayashiShoichiro Usui
    • Nobuo KatoKoichi HayashiShoichiro Usui
    • F02M61/16
    • F02M55/02F02M55/005F02M2200/80F16L19/0286
    • A connection head structure of a high pressure fuel injection tube is provided to avoid an interference between an annular flange and an opposing part by sufficiently maintaining an tube axial direction length of the connection head and to obtain a good sealability to prevent leaking during autofrettage processing with a high pressure of not less than 300 MPa. A connection head structure of a high pressure fuel injection tube includes, on a connection end portion of a thick walled fine steel tube, a spherical seat face, an annular flange, and a circular conic face that continuously extends from the seat face, wherein a washer and a fastening nut are assembled, characterized in that when a thick walled fine steel tube has t (wall thickness)/D (outer diameter)
    • 提供高压燃料喷射管的连接头结构,以通过充分保持连接头的管轴向长度来避免环形凸缘和相对部分之间的干涉,并且获得良好的密封性,以防止在自紧摩擦加工期间的泄漏, 高压不小于300MPa。 高压燃料喷射管的连接头结构在厚壁细钢管的连接端部上包括从座面连续延伸的球面座面,环形凸缘和圆锥面,其中, 垫圈和紧固螺母组装,其特征在于,当厚壁细钢管的t(壁厚)/ D(外径)<0.3时,从连接头端到背面的管轴方向距离L1 环形凸缘为0.38D〜0.7D,座面的球体半径R为0.45〜0.65D,环形凸缘的外径D1为1.2D〜1.4D,其中,内周面 连接头包括两级锥形面,其具有沿着管的管轴方向的横截面轮廓,朝向管的孔扩大。
    • 8. 发明授权
    • Common rail and method of manufacturing same
    • 共轨和制造方法相同
    • US5903964A
    • 1999-05-18
    • US856872
    • 1997-05-15
    • Tadahiro UematsuNobuo Kato
    • Tadahiro UematsuNobuo Kato
    • F02M55/00F02M55/02F16L19/02B23P19/00
    • F02M55/005F02M55/025F16L19/025Y10T29/49432Y10T29/49881
    • A common rail is provided which is simple in structure and capable of connecting a piping component to a thick wall pipe thereof in a highly sealed and light weighted manner. In a common rail adapted to connect a pipe component to at least one end of a thick wall pipe having a flow passage 1' therein for accumulating pressure of high pressure fuel so that high pressure fuel is supplied from a high-pressure pump and distribute-supplied to an injection nozzle, the end portion of the thick wall pipe 1 is reduced in diameter by drawing. A thread portion 1a is formed in an outer peripheral surface of the diameter-reduced end portion. A connecting end of the piping component 3 is connected to an end portion of the thick wall pipe 1 by screwing a fastening screw means 5, 5' to the thread portion 1a.
    • 提供一种共轨,其结构简单,能够以高度密封且轻量化的方式将管道部件连接到厚壁管。 在适于将管道部件连接到其中具有流动通道1'的厚壁管道的至少一端的共轨中,用于累积高压燃料的压力,使得从高压泵供应高压燃料, 提供给注射喷嘴,厚壁管1的端部通过拉伸而直径减小。 螺纹部1a形成在直径减小端部的外周面上。 管道部件3的连接端部通过将紧固螺钉装置5,5'拧入螺纹部1a而与厚壁管1的端部连接。