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    Hydraulic power steering apparatus for vehicle
    3.
    发明公开
    Hydraulic power steering apparatus for vehicle 有权
    车辆液压动力转向

    公开(公告)号：EP1149755A2

    公开(公告)日：2001-10-31

    申请号：EP01104422.9

    申请日：2001-02-26

    申请人： SHOWA CORPORATION

    发明人： Serizawa, Akihiko, c/o Showa Corporation ,  Ishiwata, Masaru, c/o Showa Corporation

    IPC分类号： B62D6/02

    CPC分类号： B62D5/062 ,  B62D5/083 ,  B62D5/0837 ,  Y10T137/86654

    摘要： A hydraulic power steering apparatus for a vehicle is provided with a main control valve in which a valve opening degree is controlled on the basis of a relative movement between an input shaft interlocking with a steering wheel and an output shaft interlocking with a steering mechanism for turning a steered wheel, a power cylinder mechanism generating a steering assist force, a pump apparatus discharging a fixed flow amount of working oil, a first flow passage including a supply passage communicated with the main control valve, and a control unit controlling an assist control valve. The main control valve controls a supply amount of the working oil in the first flow passage to the power steering apparatus, and the assist control valve controlling a flow amount of a part of the working oil discharged from the pump apparatus 1 is controlled to a set valve opening degree set on the basis of a vehicle speed and an oil pressure of the working oil in the first flow passage, by the control unit.

    Hydraulic power steering control valve
    4.
    发明公开
    Hydraulic power steering control valve 有权
    一种用于液压动力转向控制阀

    公开(公告)号：EP1132278A2

    公开(公告)日：2001-09-12

    申请号：EP01105885.6

    申请日：2001-03-09

    申请人： TRW INC.

    发明人： Strong, Daniel J.

    IPC分类号： B62D5/083

    CPC分类号： B62D5/0837 ,  Y10T137/86654 ,  Y10T137/86662

    摘要： A hydraulic fluid control valve (18) for a power steering gear (10) includes first and second relatively rotatable valve members (60, 62) which direct hydraulic fluid to flow between the valve members (60, 62) from inlet ports (70) to outlet ports (92). The valve members (60, 62) have radially opposed lands (71-79, 101-109) and grooves (81-89, 121-129) defining orifices (130) that enlarge and orifices (130) that constrict upon relative rotation of the valve members (60, 62) from neutral positions. A pair of the constricting orifices (130b, 130c) are located in parallel between the inlet ports (90) and the outlet ports(92).
    Each of those parallel constricting orifices (130b, 130c) is defined by a corresponding chamfered corner portion of a corresponding land (101, 102). The valve members (60, 62) provide back pressure at selected orifices between the outlet ports (92) and the inlet ports (90). The selected orifices include both constricting orifices (130b, 130c). The means for providing back pressure comprises a third land (102) which is spaced from the pair of lands. The third land (102) defines a third orifice (130d) located in series with the parallel constricting orifices. The third orifice (130d) has a constant size for all relative positions of the first and second valve members (60, 62) through the range of movement of the valve.

    Power steering control valve with noise reduction
    5.
    发明公开
    Power steering control valve with noise reduction 失效
    Steuerventilfüreine Servolenkung mitGeräuschreduzierung

    公开(公告)号：EP0846608A2

    公开(公告)日：1998-06-10

    申请号：EP97121650.2

    申请日：1997-12-09

    申请人： TRW INC.

    发明人： Strong, Daniel J.

    IPC分类号： B62D5/083

    CPC分类号： B62D5/0837 ,  Y10T137/86654

    摘要： A hydraulic fluid control valve (18) includes first and second valve members (60, 62) which are rotatable relative to each other about an axis (23). The valve members (60, 62) define hydraulic fluid flow orifices (110) which are spaced apart circumferentially about the axis (23). The orifices (110) are variable in size such that an orifice (110a) enlarges when a pair of adjacent orifices (110b and 110c) constrict upon relative rotation of the valve members from neutral positions. The pair of constricting orifices (110b, 110c) initially constrict at unequal rates, and subsequently constrict at equal rates until reaching fully constricted conditions.

    摘要翻译： 液压流体控制阀（18）包括第一和第二阀构件（60,62），所述第一和第二阀构件可围绕轴线（23）相对于彼此旋转。 阀构件（60,62）限定围绕轴线（23）周向间隔开的液压流体流动孔（110）。 所述孔口110的尺寸是可变的，使得当一对相邻孔口（110b和110c）在阀构件相对于中立位置相对旋转时收缩时孔口（110a）扩大。 一对收缩孔（110b，110c）最初以不相等的速率收缩，并且随后以相等的速率收缩直到达到完全收缩的条件。

    Steering control valve with different size flow gaps for noise suppression
    7.
    发明公开
    Steering control valve with different size flow gaps for noise suppression 失效
    Servolenkungsventil mitStrömungsöffnungenvon unterschiedlicherGrössezurGeräuschunterdrückung

    公开(公告)号：EP0728654A1

    公开(公告)日：1996-08-28

    申请号：EP96102381.9

    申请日：1996-02-16

    申请人： TRW INC.

    发明人： Behrens, Hermann W. ,  Harpole, George M. ,  Lin, Jane Ming-Chin ,  Wolff, Michael F. ,  Gilbert, Wendell L.

    IPC分类号： B62D5/083

    CPC分类号： B62D5/0837 ,  Y10T137/86654 ,  Y10T137/86662

    摘要： A valve (10) for controlling flow of hydraulic fluid. The valve (10) has first and second valve members (80, 82) which have a plurality of lands and grooves. The valve members (80, 82) are relatively movable from a neutral position to a displaced position in which surface segments (202, 226, 208, 218) of respective pairs of lands overlap to form flow gaps (232, 234) for restricting flow of fluid between respective pairs of grooves. At least one (234) of the flow gaps is divergent by having a cross-sectional flow area which increases along a direction of fluid flow and at least one (232) of the flow gaps is convergent by having a cross-sectional flow area which decreases along a direction of fluid flow. The flow gaps (232, 234) have minimum cross-sectional flow areas (A, B) defined by the surface segments. The flow gaps (232, 234) are sized such that the minimum cross-sectional flow area (A) of the convergent flow gap (232) is larger than the minimum cross-sectional flow area (B) of the divergent flow gap (234) for suppressing valve noise.

    摘要翻译： 一种用于控制液压流体流动的阀门（10）。 阀（10）具有第一和第二阀构件（80,82），其具有多个平台和凹槽。 阀构件（80,82）可从中性位置相对移动到位移位置，在该位置处，相应对的脊的表面段（202,226,208,218）重叠以形成用于限制流动的流动间隙（232,234） 的各对槽之间的流体。 至少一个（234）的流动间隙通过具有沿流体流动方向增加的横截面流动面积而发散，并且流动间隙的至少一个（232）通过具有横截面流动面积而会聚， 沿流体流动的方向减小。 流动间隙（232,234）具有由表面段限定的最小横截面流动面积（A，B）。 流动间隙（232,234）的尺寸使得会聚流动间隙（232）的最小横截面流动面积（A）大于发散流动间隙（234）的最小横截面积面积（B） ）用于抑制阀门噪音。