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公开(公告)号：US5152359A
公开(公告)日：1992-10-06
申请号：US671346
申请日：1991-03-19
摘要： A reaction pressure control mechanism of power steering apparatus includes a power cylinder, to which a pressure oil discharged from an oil pump is supplied through a control valve, and oil discharged from the oil pump is branched to be introduced into a hydraulic reaction chamber, which produces steering reaction. A pair of variable restrictions are formed in a supply and discharge passage to and from the hydraulic reaction chamber, and a single spool which is operated by a solenoid is effective to increase the opening of one of the variable restrictions while reducing the opening of the other restriction. A plunger is disposed in opposing relationship with a rod associated with the solenoid and on which the spool is fixedly mounted so that when the oil pressure in the reaction chamber exceeds a given value, such oil pressure is introduced to the backside of the plunger to cause the spool to be driven back, thus reducing the opening of the variable restriction associated with the supply passage.
摘要翻译： 动力转向装置的反作用压力控制机构包括动力缸，通过控制阀向油泵供给的压力油供给到动力缸，并且从油泵排出的油被分支引入液压反应室， 产生转向反应。 在进出液压反应室的供给和排出通道中形成一对可变限制，并且由螺线管操作的单个阀芯有效地增加可变限制中的一个的打开，同时减少另一个的打开 限制。 柱塞与与螺线管相关联的杆相对设置，并且其上固定安装有线轴，使得当反应室中的油压超过给定值时，这种油压被引入到柱塞的背面，引起 所述线轴被驱回，从而减小与供应通道相关联的可变限制的打开。
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公开(公告)号：US5740879A
公开(公告)日：1998-04-21
申请号：US465769
申请日：1995-06-06
摘要： A vehicle speed responsive power steering apparatus enables a pressure which acts upon a power cylinder to be variably controlled in accordance with a vehicle speed or the like, thus allowing an assisting force to be controlled in a variable manner. A control valve CV selectively connects a pump P and a tank T to left and right chambers CL, CR of a power cylinder. The control valve comprises a first and a second fluid pressure bridge circuit 10, 20. The first fluid pressure bridge circuit includes a left and a right path 12, 13, in which a first and a second pair of variable throttles 1R, 1L and 2L, 2R are disposed which are opened or closed in response to a steering operation. The left and the right chamber of the cylinder are connected to the respective paths at the junctions between the variable throttles. A pair of paths 21, 22 branch from a supply path 11 extending from the pump, and a second fluid pressure bridge circuit is defined between the paths 21, 22, in parallel relationship with the first fluid pressure bridge circuit. The second fluid pressure bridge circuit includes variable throttles 3L, 3R, 4R, 4L which are opened and closed in response to a steering operation, and a vehicle speed responsive variable throttle valve 6 which is controlled to be opened or closed in accordance with a vehicle speed.
摘要翻译： 车辆速度响应型动力转向装置使得能够根据车辆速度等可变地控制作用在动力缸上的压力，从而允许以可变的方式控制辅助力。 控制阀CV选择性地将泵P和罐T连接到动力缸的左室CL和右室CL。 控制阀包括第一和第二流体压力桥接电路10,20。第一流体压力桥接电路包括左右路径12,13，其中第一和第二对可变节流管1R，1L和2L ，2R设置成响应于转向操作而打开或关闭。 圆筒的左右室连接在可变节流管之间的连接处的相应路径上。 一对路径21,22从从泵延伸的供应路径11分支，并且第二流体压力桥接电路以与第一流体压力桥接电路平行的关系限定在路径21,22之间。 第二流体压力桥电路包括响应于转向操作而打开和关闭的可变节流器3L，3R，4R，4L，以及根据车辆被控制为打开或关闭的车速响应可变节流阀6 速度。
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公开(公告)号：US5263512A
公开(公告)日：1993-11-23
申请号：US989774
申请日：1992-12-14
CPC分类号： B62D5/0837 , Y10T137/86654 , Y10T137/86662
摘要： In each of both ends of a land portion provided between channels which are formed in a slidable contact surface of a rotor assembled in a sleeve so as to be rotationally displaceable relative to the sleeve and thus control connection and disconnection of fluid paths, a chamfer is formed from an edge to a throttling action end portion of the land portion of the rotor so as to have at least one flat acting surface and a curved acting surface continuously connected to the flat acting surface. The curved acting surface of the chamfer is formed to have a smooth, continuously curved surface with a radius of curvature which decreases gradually from a connection portion with respect to the flat acting surface to a point at which it is connected to an outer diameter portion of the rotor. When a throttling action is performed by rotationally displacing the rotor with respect to the sleeve, an angle defined between the flat and curved acting surfaces at a connection point between them and an angle defined between the curved acting surface and a tangent at a point at which the curved acting surface is connected to the outer diameter portion of the rotor are maintained small, which reduces fluid noise caused by cavitation.
摘要翻译： 在设置在通道之间的接地部分的两端中的每一个中，所述接地部分形成在组装在套筒中的转子的可滑动接触表面中，以便相对于套筒可旋转移位，从而控制流体路径的连接和断开， 从转子的陆部的边缘到节流动作端部形成为具有连续地连接到平坦作用面的至少一个平坦作用面和弯曲作用面。 倒角的弯曲作用表面形成为具有光滑的，连续弯曲的表面，其曲率半径从连接部分相对于平坦作用表面逐渐减小到其连接到外部直径部分的点 转子。 当通过相对于套筒旋转地移动转子来执行节流动作时，在平坦和弯曲作用表面之间的角度处限定在它们之间的连接点处，并且在弯曲作用表面和在其之间的切线 连接到转子的外径部分的弯曲作用表面保持较小，这降低了由气蚀引起的流体噪声。
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公开(公告)号：US5168949A
公开(公告)日：1992-12-08
申请号：US686661
申请日：1991-04-17
IPC分类号： B62D6/02
CPC分类号： B62D6/02
摘要： A subpump has its discharge flow rate increased in response to an increase in a vehicle speed. A variable throttle is disposed in a discharge passage from the subpump, and an oil pressure taken from the upstream side of the variable throttle is introduced into a hydraulic reaction chamber to produce a steering action. A main pump has its flow rate increased or decreased in accordance with a number of revolutions thereof, and feeds a pressure oil to a power steering control valve through a passage in which a fixed restriction is disposed. An oil pressure which prevails upstream of the fixed restriction acts upon the variable throttle to change its area of opening, thereby controlling the steering force.
摘要翻译： 副泵的排气流量随着车速的增加而增加。 可变节流阀设置在来自副泵的排气通道中，从可变节流阀的上游侧获取的油压被引入到液压反应室中以产生转向作用。 主泵的流量根据其转数而增加或减少，并且通过设置有固定限制的通道将压力油供给到动力转向控制阀。 在固定限制器上游的油压作用在可变节流阀上以改变其开口面积，由此控制转向力。
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公开(公告)号：US5135068A
公开(公告)日：1992-08-04
申请号：US789795
申请日：1991-11-12
IPC分类号： B62D6/02
CPC分类号： B62D6/02
摘要： A hydraulic reaction device of a power steering apparatus includes a vehicle-speed responsive pump, a reaction plunger, a hydraulic reaction chamber, a path, and a variable control unit. The vehicle-speed responsive pump has a pressure oil discharge flow rate which changes in accordance with a vehicle speed. The reaction plunger selectively constraining relative pivotal displacement between input and output shafts constituting a rotary flow path switching valve of the power steering apparatus. The hydraulic reaction chamber receives the pressure oil from the pump to apply a reaction oil pressure to the reaction plunger. The path is arranged to connect the hydraulic reaction chamber to a tank. The variable control unit (a variable throttle portion 37 of a reaction oil pressure control valve 11) for variably controlling a flow rate of the pressure oil flowing through the path. The variable control unit is variably controlled in accordance with a magnitude of an oil pressure in a main oil pressure path extending from a main pump to the left and right chambers of the power cylinder.
摘要翻译： 动力转向装置的液压反应装置包括车速响应泵，反应柱塞，液压反应室，路径和可变控制单元。 车速响应泵具有根据车速而变化的压力油排出流量。 反应柱塞选择性地限制构成动力转向装置的旋转流路切换阀的输入和输出轴之间的相对枢转位移。 液压反应室从泵接收压力油，以将反应油压施加到反应柱塞。 该路径被布置成将液压反应室连接到罐。 可变控制单元（反作用油压控制阀11的可变节流部37），用于可变地控制流经路径的压力油的流量。 可变控制单元根据从主泵延伸到动力缸的左室和右室的主油压路径中的油压的大小可变地控制。
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公开(公告)号：US5259474A
公开(公告)日：1993-11-09
申请号：US830935
申请日：1992-02-04
申请人： Yasuyoshi Emori
发明人： Yasuyoshi Emori
CPC分类号： B62D6/02 , B62D5/087 , Y10T137/2607 , Y10T137/2705
摘要： A hydraulic pressure acting in a hydraulic reaction chamber of a power steering system is controlled. A spool valve is formed with portions having a greater and a smaller diameter, which portions are partly situated in an annular groove formed in a valve opening and communicating with the hydraulic reaction chamber. A spring is disposed to one side of the spool valve nearer the portion of a greater diameter to urge it toward the portion of a smaller diameter. Toward the portion of a smaller diameter, the spool valve abuts against a rod of a solenoid. The hydraulic pressure from a pump is introduced into the annular groove through a variable throttle formed in the portion of a greater diameter while the hydraulic pressure in the annular groove is returned to a tank through a variable throttle formed in the portion of a smaller diameter. As the hydraulic pressure in the annular groove rises, the spool valve is shifted in accordance with a difference in the pressure responsive areas, thus suppressing an increase in the reaction pressure.
摘要翻译： 控制作用在动力转向系统的液压反应室中的液压。 滑阀形成有具有大直径和较小直径的部分，这些部分部分地位于形成在阀开口中并与液压反应室连通的环形槽中。 弹簧设置在更靠近更大直径部分的滑阀的一侧，以将其推向较小直径的部分。 对于较小直径的部分，滑阀抵靠螺线管的杆。 来自泵的液压通过形成在较大直径部分中的可变节流阀被引入到环形槽中，同时环形槽中的液压通过形成在较小直径部分中的可变节流器返回到罐中。 当环形槽中的液压上升时，滑阀根据压力响应区域的差异而偏移，从而抑制了反应压力的增加。
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公开(公告)号：US5097869A
公开(公告)日：1992-03-24
申请号：US720351
申请日：1991-06-25
申请人： Yasuyoshi Emori
发明人： Yasuyoshi Emori
IPC分类号： B62D5/083
CPC分类号： B62D5/083 , Y10T137/86654 , Y10T137/86662
摘要： A fluid control valve device includes a sleeve, a rotor, and a first recess groove. The sleeve has an inner circumferential surface in which two types of axial channel grooves communicating with an input port and a return port are formed in the circumferential direction, and left and right output ports are open in land portions between the channel grooves. The rotor is inserted in the inner circumferential surface of the sleeve so as to be rotatably held relative to the sleeve and has an outer circumferential surface in which channel grooves communicating with the axial channel grooves of the sleeve are formed in the circumferential direction at positions opposite to the land portions in which the output ports of the sleeve are open, and first and second land portions are formed at positions opposite to the channel grooves of the sleeve. The first recess groove is formed in the first land portion of the rotor to oppose a fluid supply hole communicating with the input port and open in the channel groove of the sleeve.
摘要翻译： 流体控制阀装置包括套筒，转子和第一凹槽。 套筒具有内周面，在圆周方向上形成有与输入口和返回口连通的两种轴向通道槽，左右输出口在通道槽之间的陆部开口。 转子被插入到套筒的内周面中，以相对于套筒可旋转地保持，并具有外圆周表面，在圆周方向的相对位置形成有与套筒的轴向通道槽相通的通道槽 到其中套筒的输出端口打开的接合部分，并且第一和第二接地部分形成在与套筒的沟槽相对的位置处。 第一凹槽形成在转子的第一接地部分中，与与输入端口连通并在套筒的槽槽中开口的流体供给孔相对。
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公开(公告)号：US5158149A
公开(公告)日：1992-10-27
申请号：US815842
申请日：1991-12-30
申请人： Yasuyoshi Emori
发明人： Yasuyoshi Emori
IPC分类号： B62D6/02
CPC分类号： B62D6/02
摘要： A steering force control apparatus for a power steering system includes a valve. The valve includes a valve hole, a spool, and a spring. A main pump oil supply path branched from a main hydraulic path extending from a pump to a power cylinder, a reaction path connected to a hydraulic reaction chamber, and a discharge path connected to a tank are open to the valve hole to be spaced apart from each other by predetermined distances along an axis of the valve. The spool is slidably arranged in the valve hole and has land portions so as to change connecting states of the main pump oil supply path, the reaction path, and the discharge path. The spring always biases the spool in one direction. A subpump oil supply path for supplying a fluid from a subpump whose delivery pressure is changed is connected to an end of the spool which is biased by the spring, thereby controlling an operation of the spool by the subpump in correspondence with a vehicle speed.
摘要翻译： 用于动力转向系统的转向力控制装置包括阀。 阀包括阀孔，阀芯和弹簧。 从泵向动力缸延伸的主液压路径分支的主泵油供给路径，连接到液压反应室的反作用路径和连接到油箱的排出路径与阀孔分开开口 彼此沿着阀的轴线预定的距离。 阀芯可滑动地布置在阀孔中并具有接地部分，以改变主泵油供给路径，反作用路径和排出路径的连接状态。 弹簧总是在一个方向上偏置线轴。 用于从输送压力改变的副泵供给流体的副泵供油路径连接到由弹簧偏压的阀芯的端部，由此通过副泵对应于车速来控制阀芯的操作。
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公开(公告)号：US5069250A
公开(公告)日：1991-12-03
申请号：US581281
申请日：1990-09-12
IPC分类号： B62D5/083
CPC分类号： B62D5/083 , Y10T137/86654 , Y10T137/86662
摘要： A rotary valve for power steering apparatus includes an input shaft, an output shaft disposed in axial alignment with the input shaft and connected thereto by a torsion bar, a valve rotor formed on the input shaft, and a valve sleeve connected to the output shaft and fitted over the valve rotor. A return oil path in the input shaft is formed inside a step defined in the internal surface of the valve sleeve while a return oil path in the valve sleeve is formed in a cylindrical portion of an increased internal diameter and extends therefrom along the step to define a return flow groove.
摘要翻译： 一种用于动力转向装置的旋转阀，包括输入轴，与输入轴轴向对准并通过扭杆连接的输出轴，形成在输入轴上的阀转子和连接到输出轴的阀套，以及 安装在阀转子上。 输入轴内的返回油路形成在限定在阀套的内表面内的台阶内，而阀套中的返回油路形成为内径增大的圆柱形部分，并沿着该台阶延伸以限定 回流槽。
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公开(公告)号：US5634527A
公开(公告)日：1997-06-03
申请号：US234574
申请日：1994-04-28
申请人： Yasuyoshi Emori
发明人： Yasuyoshi Emori
CPC分类号： B62D6/02
摘要： A main servo valve 4 is switched in response to a relative angular displacement between an input and an output shaft for supplying an operating oil discharged from a pump to or displacing such operating oil from a power cylinder 6. An auxiliary servo valve 10 is disposed between the input and the output shaft and is connected in parallel relationship with the main servo valve 4 so as to be operated jointly therewith. A vehicle speed responsive valve 16 which opens or closes a flow path in accordance with the vehicle speed is disposed upstream of the auxiliary servo valve 10. The pump comprises a pair of pumps 2, 12 of smaller size. At low speeds, the speed responsive valve 16 is closed, and the oil discharged from the pair of pumps 2, 12 are merged to be introduced into the main servo valve 4. As the vehicle speed increases, the speed responsive valve 16 is gradually opened, and at a vehicle speed above a given value, one of the pumps, 12, ceases to operate.
摘要翻译： 主伺服阀4响应于输入和输出轴之间的相对角位移而被切换，用于将从泵排出的工作油供给到动力缸6或从动力缸6移位这样的工作油。辅助伺服阀10设置在 输入轴和输出轴，与主伺服阀4并联连接，与主伺服阀4并联运行。 根据车速打开或关闭流路的车速响应阀16设置在辅助伺服阀10的上游。泵包括一对较小尺寸的泵2,12。 在低速时，速度响应阀16关闭，并且从一对泵2,12排出的油被合并以被引入主伺服阀4.当车速增加时，速度响应阀16逐渐打开 ，并且在高于给定值的车辆速度下，其中一个泵12停止操作。
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