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公开(公告)号：US5794507A
公开(公告)日：1998-08-18
申请号：US762605
申请日：1996-12-09
申请人： Daniel J. Strong
发明人： Daniel J. Strong
CPC分类号： B62D5/0837 , Y10T137/86654
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 at which back pressure is provided include only one (130c) of the pair of parallel constricting orifices (130b, 130c).
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公开(公告)号：US5259413A
公开(公告)日：1993-11-09
申请号：US936135
申请日：1992-08-27
IPC分类号： B62D5/083 , B62D5/24 , F15B13/04 , F16K11/076
CPC分类号： B62D5/0837 , Y10T137/86638 , Y10T137/86662
摘要： A valve for controlling flow of hydraulic fluid. The valve includes a valve sleeve and a valve core. The core is disposed within the sleeve. The core and sleeve are relatively rotatable. Each of said core and sleeve has an axially extending land and an axially extending groove. The core and sleeve have relative rotational positions such that the lands overlap to define a flow gap for flow of hydraulic fluid from the groove in the sleeve to the groove in the core. The flow gap has a minimum cross-sectional flow area adjacent to the groove in the core. The minimum cross-sectional flow area constantly varies as the core and sleeve relatively rotate. The land on the sleeve has a notch immediately adjacent to, and downstream of the minimum cross-sectional flow area which provides an abrupt increase in cross-sectional flow area for suppressing valve noise due to cavitation.
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公开(公告)号：US5244012A
公开(公告)日：1993-09-14
申请号：US920055
申请日：1992-07-27
申请人： Kazumasa Tabata , Manabu Takaoka
发明人： Kazumasa Tabata , Manabu Takaoka
IPC分类号： B62D5/083
CPC分类号： B62D5/0837 , Y10T137/86654 , Y10T137/86662
摘要： A hydraulic pressure control valve, wherein a valve body having six oil grooves on its outer periphery at specified intervals is rotatably disposed in a cylindrical casing having six oil grooves on its inner periphery at specified intervals, and throttles are constructed on both sides of the respective oil grooves, thereby two throttling units each of which consisting of six throttles, are constructed and respective two throttles facing to each other in the radial direction among respective six throttles constructing respective throttling units have regions in which throttle areas do not substantially change until the relative angular displacement between the valve body and the casing reaches a predetermined magnitude.
摘要翻译： 一种液压控制阀，其特征在于，具有规定间隔的外周上具有六个油槽的阀体以规定的间隔可旋转地设置在其内周上具有六个油槽的圆筒形壳体中，并且在相应的两侧形成有节流阀 油槽，由此构成两个由六个节流阀构成的节流单元，并且在构成相应的节流单元的各个六个节流阀中，在径向上相应的两个节流阀彼此面对，具有节流区域基本上不会改变的区域，直到相对 阀体和壳体之间的角位移达到预定的大小。
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公开(公告)号：US5133384A
公开(公告)日：1992-07-28
申请号：US739948
申请日：1991-08-02
申请人： Kazumasa Tabata , Manabu Takaoka
发明人： Kazumasa Tabata , Manabu Takaoka
IPC分类号： B62D5/083
CPC分类号： B62D5/0837 , Y10T137/86654
摘要： A hydraulic pressure control valve, wherein a valve body having six oil grooves on its outer periphery at specified intervals is rotatably disposed in a cylindrical casing having six oil grooves on its inner periphery at specified intervals, and throttles are constructed on both sides of the respective oil grooves, thereby two throttling units each of which consisting of six throttles, are constructed and respective two throttles facing to each other in the radial direction among respective six throttles constructing respective throttling units have regions in which throttle areas do not substantially change until the relative angular displacement between the valve body and the casing reaches a predetermined magnitude.
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公开(公告)号：US08392067B2
公开(公告)日：2013-03-05
申请号：US12935211
申请日：2009-03-11
申请人： Satoru Yamamoto , Takaaki Noda , Yasuto Yanagida
发明人： Satoru Yamamoto , Takaaki Noda , Yasuto Yanagida
IPC分类号： A01B69/00
CPC分类号： B62D5/083 , B62D5/065 , B62D5/0837
摘要： A power steering device includes an oil-hydraulic pump, an electric motor to drive the pump, an inverter, a control valve, a power cylinder to produce a steering assist, and a control unit to control the drive signal of the inverter. The control valve includes a pump port supplied with oil from the pump, a first and second cylinder ports connected to first and second cylinder chambers on sides of the piston, and a discharge port. Communication between the first cylinder port and the pump port and communication between the second cylinder port and the discharge port, and communication between the first cylinder port and the discharge port and communication between the second cylinder port and the pump port are established in steered status in the other direction. Communication among the pump port and first and second cylinder ports, and isolation of the discharge port from the pump port and first and second cylinder ports are established when the control valve is in neutral status.
摘要翻译： 动力转向装置包括油压泵，用于驱动泵的电动马达，逆变器，控制阀，动力缸以产生转向辅助，以及用于控制逆变器的驱动信号的控制单元。 控制阀包括从泵供给油的泵口，连接到活塞侧面的第一和第二气缸室的第一和第二气缸端口以及排出口。 在第一气缸端口和泵口之间的通信以及第二气缸端口和排出口之间的连通以及第一气缸端口和排出口之间的连通以及第二气缸端口和泵口之间的连通在转向状态下建立 另一个方向。 当控制阀处于空档状态时，建立泵口和第一和第二气缸端口之间的通信，以及排出口与泵口和第一和第二气缸端口的隔离。
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公开(公告)号：US20080135325A1
公开(公告)日：2008-06-12
申请号：US11999884
申请日：2007-12-07
CPC分类号： B62D5/0837 , B62D5/065
摘要： A center-closed power steering system provides power steering assistance in engine-off conditions for reduced fuel consumption. The power steering system includes a hydraulic pump mechanically driven by the engine, a high pressure accumulator, a steering gearbox fluidly connected to the accumulator, and a center closed valve mechanically connected to a driver-operated steering wheel. The valve is configured to selectively control flow of pressurized fluid from the accumulator to the steering gearbox to provide power steering assistance. The inner shaft of the rotary center-closed valve is provided with a cavity with V-shaped notches on the transition surfaces on lands configured to sealingly engage the inner surface of the valve outer sleeve, in order to provide a smooth transition in flow for power steering assistance, and a better driver feel.
摘要翻译： 中央关闭的动力转向系统在发动机关闭条件下提供动力转向辅助以减少燃料消耗。 动力转向系统包括由发动机机械驱动的液压泵，高压蓄能器，流体连接到蓄能器的转向齿轮箱，以及机械地连接到驾驶员操纵的方向盘的中心关闭阀。 阀被配置成选择性地控制加压流体从蓄能器到转向齿轮箱的流动，以提供动力转向辅助。 旋转中心关闭阀的内轴设置有在凸台上的过渡表面上具有V形凹口的空腔，其被构造成密封地接合阀外套筒的内表面，以便为动力流动提供平稳过渡 转向助力和更好的司机感觉。
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公开(公告)号：US07231940B2
公开(公告)日：2007-06-19
申请号：US11532122
申请日：2006-09-15
IPC分类号： B52D5/083
CPC分类号： B62D5/0837 , Y10T137/86638 , Y10T137/86654 , Y10T137/86662
摘要： A control valve for a hydraulic power steering system includes a pair of flow circuits arranged in parallel. Each flow circuit includes an upstream and downstream flow orifices arranged in series. Each set of orifices defines between the orifices an intermediate pressure zone of the valve. Both orifices close together from a centered condition of the valve and fully close substantially together at a fully closed condition of the valve. The downstream orifice is larger than the upstream orifice when open to minimize the likelihood of cavitation and noise. An equalization passage fluidly connects both intermediate pressure zones to equalize pressure despite variations in orifice size due to manufacturing tolerances. The control valve includes a bypass passage in parallel with the flow circuits. A pressure relief valve in the control valve has a normally closed valving member in the bypass passage that opens the valve in the event of overpressure.
摘要翻译： 一种用于液压动力转向系统的控制阀，包括一对平行布置的流动回路。 每个流动回路包括串联布置的上游和下游流动孔。 每组孔口在孔之间形成阀的中间压力区。 两个孔从阀的中心状态靠近在一起，并且在阀的完全关闭状态下基本上完全关闭。 下游孔口开放时大于上游孔口，以最小化气蚀和噪音的可能性。 平衡通道流体连接两个中间压力区域，以均衡压力，尽管由于制造公差而孔尺寸的变化。 控制阀包括与流动回路平行的旁通通道。 控制阀中的压力释放阀具有旁通通道中的常闭阀构件，其在超压的情况下打开阀。
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公开(公告)号：US07152627B2
公开(公告)日：2006-12-26
申请号：US10818005
申请日：2004-04-05
IPC分类号： B52D5/083
CPC分类号： B62D5/0837 , Y10T137/86638 , Y10T137/86654 , Y10T137/86662
摘要： A control valve for a hydraulic power steering system includes a pair of flow circuits arranged in parallel. Each flow circuit includes an upstream and downstream flow orifices arranged in series. Each set of orifices defines between the orifices an intermediate pressure zone of the valve. Both orifices close together from a centered condition of the valve and fully close substantially together at a fully closed condition of the valve. The downstream orifice is larger than the upstream orifice when open to minimize the likelihood of cavitation and noise. An equalization passage fluidly connects both intermediate pressure zones to equalize pressure despite variations in orifice size due to manufacturing tolerances. The control valve includes a bypass passage in parallel with the flow circuits. A pressure relief valve in the control valve has a normally closed valving member in the bypass passage that opens the valve in the event of overpressure.
摘要翻译： 一种用于液压动力转向系统的控制阀，包括一对平行布置的流动回路。 每个流动回路包括串联布置的上游和下游流动孔。 每组孔口在孔之间形成阀的中间压力区。 两个孔从阀的中心状态靠近在一起，并且在阀的完全关闭状态下基本上完全关闭。 下游孔口开放时大于上游孔口，以最小化气蚀和噪音的可能性。 平衡通道流体连接两个中间压力区域，以均衡压力，尽管由于制造公差而孔尺寸的变化。 控制阀包括与流动回路平行的旁通通道。 控制阀中的压力释放阀具有旁通通道中的常闭阀构件，其在超压的情况下打开阀。
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公开(公告)号：US20050284687A1
公开(公告)日：2005-12-29
申请号：US11212727
申请日：2005-08-29
申请人： Osamu Sano
发明人： Osamu Sano
CPC分类号： B62D5/0837 , Y10T137/86638
摘要： The present invention provides a hydraulic control valve and a power steering apparatus using the same in which chamfer portions are provided only on throttle portions between oil supply chambers and first oil feed chambers and between the oil supply chambers and second oil feed chambers, or only throttle portions between oil discharge chambers 11 and the first oil feed chambers and between the oil discharge chambers 11 and the second oil feed chambers. With this design, even if six or more oil grooves of each of a valve body and a valve spool are disposed at equal distances from one another, when the minimum flow rate to be controlled is reduced as small as possible, a distribution amount for one portion where the flow rate is controlled can be doubled as compared with a conventional structure, it is possible to stabilize the hydraulic characteristics in a region where the flow rate to be controlled is minimum, and to eliminate the discontinuity of the hydraulic characteristics.
摘要翻译： 本发明提供了一种液压控制阀和使用该液压控制阀的动力转向装置，其中仅在供油室和第一供油室之间以及供油室和第二供油室之间的节流部分上设置倒角部，或者仅限制油门 排油室11和第一供油室之间以及排油室11和第二供油室之间的部分。 利用这种设计，即使阀体和阀芯中的每一个的六个以上的油槽彼此相等设置，当要控制的最小流量尽可能地减小时，一个分配量 与常规结构相比，控制流量的部分可以增加一倍，可以使要控制的流量最小的区域中的液压特性稳定，并且消除液压特性的不连续性。
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公开(公告)号：US06499507B1
公开(公告)日：2002-12-31
申请号：US09659950
申请日：2000-09-12
IPC分类号： B62D5083
CPC分类号： B62D5/0837 , Y10T137/86646
摘要： A rotary valve 10 which includes a first sleeve member 24 and a second shaft member 32. The members 24 and 32 cooperatively provide pressure to a cylinder assembly 36, effective to cause the cylinder assembly 36 to move the wheels 20, 22 in a desired direction. The valve 10 provides increased pressure to the low-pressure side of the piston as the amount of torque which is communicated to it is increased or as the velocity of the rack assembly 18 is increased from wheels 20, 22.
摘要翻译： 旋转阀10包括第一套筒构件24和第二轴构件32.构件24和32协同地向气缸组件36提供压力，有效地使气缸组件36沿所需方向移动车轮20,22 。 随着与其传递的扭矩的量增加或当齿条组件18的速度从轮20,22增加时，阀10向活塞的低压侧提供增加的压力。
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