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1.发明授权
公开(公告)号：US4846296A
公开(公告)日：1989-07-11
申请号：US151122
申请日：1988-02-01
申请人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi
发明人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi
摘要： A power steering control valve can activate not only a power assist steering system but also a rear wheel steering system. The control valve includes valve elements relatively displaceable in response to a steering input torque to define therebetween parallel first and second fluid flow paths between an oil pump and a fluid reservoir to produce a first pressure difference in a front power cylinder in response to the steering torque. The valve elements define therebetween variable flow orifice means for producing a second pressure difference in a rear wheel power cylinder in response to the steering torque. The control valve also includes an externally controlled variable flow orifice valve. This orifice valve is arranged with respect to the variable flow orifice means such that it increases fluid flow passing therethrough in response to a second predetermined variable, such as a vehicle speed, to decrease the second pressure difference in the rear wheel power cylinder.
摘要翻译： 动力转向控制阀不仅可以启动动力辅助转向系统，而且可以启动后轮转向系统。 控制阀包括响应于转向输入扭矩相对可移动的阀元件，以在油泵和流体储存器之间在其间界定平行的第一和第二流体流动路径，以响应于转向扭矩产生前动力缸中的第一压力差 。 阀元件在其间限定可变流量孔装置，用于响应于转向转矩而在后轮动力缸中产生第二压力差。 控制阀还包括外部控制的可变流量孔口阀。 该孔口阀相对于可变流量孔装置布置，使得其响应于诸如车辆速度的第二预定变量增加流过其中的流体流量，以减小后轮动力缸中的第二压力差。
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2.发明授权Variable assist power steering system with varying power assist characteristic 失效可变辅助动力转向系统具有不同的动力辅助特性
公开(公告)号：US4884648A
公开(公告)日：1989-12-05
申请号：US138480
申请日：1987-12-28
申请人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi
发明人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi
CPC分类号： B62D6/00 , Y10T137/86726
摘要： A variable assist power steering system comprises a control valve including valve elements relatively displaceable in response to a steering torque to define therebetween two parallel fluid flow paths connected between the fluid source (10) and the fluid reservoir to produce pressure difference in the power cylinder in response to the steering torque. The control valve includes a plurality of bypass paths, each arranged in parallel to one of plurality of serially arranged variable flow orifices forming the two flow paths and each provided with an externally controlled variable flow orifice valve which is operable responsive to a vehicle speed.
摘要翻译： 可变辅助动力转向系统包括控制阀，该控制阀包括响应于转向扭矩相对移位的阀元件，以在其间限定两个平行的流体流动路径，该流体流动路径连接在流体源（10）和流体储存器之间，以在动力缸中产生压力差 响应转向扭矩。 控制阀包括多个旁通路径，每个旁路路径平行布置成形成两个流动路径的多个串联布置的可变流动孔中的一个，并且每个设置有可响应于车辆速度操作的外部控制的可变流量孔口阀。
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3.发明授权Variable assist power steering system with varying power assist with vehicle speed 失效可变辅助动力转向系统，具有不同的动力辅助车速
公开(公告)号：US4862985A
公开(公告)日：1989-09-05
申请号：US138402
申请日：1987-12-28
申请人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi , Hirohide Kai
发明人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi , Hirohide Kai
CPC分类号： B62D6/00
摘要： A control valve includes valve elements relatively displaceable in response to a steering torque to define therebetween two parallel fluid flow paths connected between a fluid source and a fluid reservoir to produce pressure difference in a power cylinder. The control valve comprises a bypass path including a first externally controlled variable flow orifice and a variable flow orifice variable with steering torque and a first externally controlled variable flow orifice valve which are connected in series, a second externally controlled variable flow orifice valve, and a second variable flow orifice variable with steering torque. The bypass path is arranged in parallel with a portion of the two parallel fluid paths, the second externally controlled variable flow orifice valve is arranged in parallel with another portion of the parallel fluid paths, and the second variable flow orifice is arranged in series in the remaining portion of the parallel fluid paths.
摘要翻译： 控制阀包括响应于转向扭矩相对可移位的阀元件，以在两个平行的流体流动路径之间限定两个平行的流体流动路径，其连接在流体源和流体储存器之间以产生动力缸中的压力差。 控制阀包括一个旁路，该旁路包括一个第一外部控制的可变流量孔和一个具有转向转矩的可变流量孔变量和一个串联连接的第一外部受控可变流量孔口阀，一个第二外部控制的可变流量孔口阀， 第二个可变流量孔径变量与转向扭矩。 旁路路径与两条平行的流体路径的一部分平行设置，第二外部控制的可变流量孔口阀与另一部分平行的流体路径平行设置，第二可变流量孔口串联布置在 平行流体路径的剩余部分。
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公开(公告)号：US4875542A
公开(公告)日：1989-10-24
申请号：US213022
申请日：1988-06-29
申请人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi
发明人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi
CPC分类号： B62D6/00
摘要： A variable assist power steering system employing a fluid distributor circuit of the open center type is disclosed. The fluid distributor circuit includes two parallel fluid flow paths connected to both chambers of a power cylinder respectively to produce a pressure differential between the both cylinder chambers in response to steering torque. For modulating the valve characteristics, two additional variable flow restrictors are arranged in series with two main variable flow restrictors and two bypass paths are arranged to bypass the main variable flow restrictors, respectively. The bypass paths are provided with variable flow orifice valves, respectively, which valves are controlled in response to a turning direction of a steering wheel and also to some external signal, such as vehicle speed.
摘要翻译： 公开了一种采用开放式中心型流体分配器电路的可变辅助动力转向系统。 流体分配器电路包括分别连接到动力缸的两个腔室的两个平行的流体流动路径，以响应于转向扭矩而在两个气缸室之间产生压力差。 为了调节阀门特性，两个附加的可变流量限制器与两个主要可变流量限制器串联布置，并且两个旁路路径分别布置成绕过主要可变流量限制器。 旁通路径分别设置有可变流量节流阀，其响应于方向盘的转向方向以及诸如车辆速度的某些外部信号而被控制。
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公开(公告)号：US4860846A
公开(公告)日：1989-08-29
申请号：US138490
申请日：1987-12-28
申请人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi
发明人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi
CPC分类号： B62D6/00
摘要： A control valve includes valve elements relatively displaceable in response to a predetermined variable (e.g., a steering torque) to define therebetween two parallel fluid flow paths connected between a fluid source and a fluid reservoir to produce pressure different in a power cylinder. The control valve a variable flow orifice that is arranged in series with regard to one of variable flow orifices of the parallel fluid flow paths, and a bypass path including has an externally controlled variable flow orifice valve that has an orifice area variable in response to a second predetermined variable which is different from the first predetermined variable.
摘要翻译： 控制阀包括响应于预定变量（例如，转向扭矩）相对可移位的阀元件，以在两个平行的流体流动路径之间限定两个平行的流体流动路径，其连接在流体源和流体储存器之间以产生在动力缸中不同的压力。 所述控制阀是可变流量孔口，其相对于所述平行流体流动路径的可变流动孔口中的一个排列成串联，并且旁路路径包括外部控制的可变流量孔口阀，其具有响应于 与第一预定变量不同的第二预定变量。
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6.发明授权Operating noise-free fluid flow distributor circuit for variable assist power steering system 失效用于可变辅助动力转向系统的无噪声流体流量分配器电路
公开(公告)号：US4852462A
公开(公告)日：1989-08-01
申请号：US151121
申请日：1988-02-01
申请人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi
发明人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi
IPC分类号： B62D5/07 , B62D6/00 , B62D6/02 , B62D101/00 , B62D119/00
CPC分类号： B62D6/02 , Y10T137/86662 , Y10T137/87177
摘要： A power assist steering system comprises a control valve which defines a fluid flow distributor circuit which includes two parallel first and second fluid flow paths connected between the hydraulic fluid source and the fluid reservoir. Inflow control variable flow orifices are arranged in series with two auxiliary variable flow orifices, respectively, which are disposed downstream with regard to the power cylinder, and the outflow control variable flow orifices are arranged in series with another two auxiliary variable flow orifices which are disposed downstream with regard to the power cylinder.
摘要翻译： 动力辅助转向系统包括限定流体流量分配器回路的控制阀，流体分配器回路包括连接在液压流体源和流体储存器之间的两个平行的第一和第二流体流路。 流量控制可变流量孔分别与两个辅助可变流量孔相连接，这两个辅助可变流量孔相对于动力缸设置在下游，并且流出控制可变流量孔与另外两个辅助可变流量孔排列， 关于动力缸的下游。
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公开(公告)号：US4830131A
公开(公告)日：1989-05-16
申请号：US151127
申请日：1988-02-01
申请人： Makato Miyoshi , Koh Uchida , Takashi Kurihara
发明人： Makato Miyoshi , Koh Uchida , Takashi Kurihara
CPC分类号： F15B11/006 , B62D6/00 , F15B2211/30575 , F15B2211/3116 , F15B2211/3144 , F15B2211/353 , F15B2211/40515 , F15B2211/45 , F15B2211/63
摘要： A circuit arrangement is proposed whereby a bypass flow coming out of one portion of a fluid flow distributor circuit of a power steering system during clockwise turning of a steering wheel and another bypass flow coming out another portion of the fluid flow distributor circuit during counterclockwise turning of the steering wheel are directed toward a fluid reservoir after passing through an externally controlled variable flow orifice.
摘要翻译： 提出了一种电路装置，其中在方向盘的顺时针方向转动期间，旁路流从动力转向系统的流体分配器电路的一部分出来，另一个旁路流在逆时针转动期间流出流体流量分配器电路的另一部分 在通过外部控制的可变流量孔口之后，方向盘指向流体储存器。
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公开(公告)号：US4771841A
公开(公告)日：1988-09-20
申请号：US102412
申请日：1987-09-29
申请人： Koh Uchida , Makoto Miyoshi
发明人： Koh Uchida , Makoto Miyoshi
IPC分类号： B62D5/07 , B62D5/083 , B62D6/00 , B62D101/00 , B62D119/00 , B62D5/08
CPC分类号： B62D6/00
摘要： A flow control passage fluidly interconnects an output flow passage and a return flow passage to bypass a control valve. A control valve operation modifying variable orifice is disposed in and partly defines the flow control passage. The control valve operation modifying variable orifice is variable in flow area in response to at least one of vehicle control factors other than steering torque. A fixed flow area orifice is disposed in and partly defines the flow control passasge at a location downstream of the control valve operation modifying variable orifice. The control valve has a plurality of steering torque responsive variable orifices and bypass passage means for bypassing at least one of the steering torque responsive variable orifices. A differential pressure passage provides communication between the upstream and downstream sides of the fixed flow area orifice. An actuator is disposed in and partly defines the differential pressure passage. The actuator has a pressure movable part which is movable in response to variation of differential pressure produced by the fixed flow area orifice. The bypass passage means includes a differential pressure responsive variable orifice operatively connected to the pressure movable part of the actuator and variable in flow area in response to movement of the pressure movable part of the actuator.
摘要翻译： 流量控制通道将输出流动通道和回流通道流体地互连以绕过控制阀。 控制阀操作修改可变孔口设置在流量控制通道中并部分地限定流量控制通道。 响应于除转向转矩之外的车辆控制因素中的至少一个，控制阀操作修改可变孔口在流动面积中是可变的。 在控制阀操作修改可变孔口的下游位置处设置固定流动面积孔并且部分地限定流量控制传递。 控制阀具有多个转向扭矩响应可变孔和用于旁路至少一个转向扭矩响应变量孔的旁路通道装置。 差压通道提供固定流动面积孔口的上游侧和下游侧之间的连通。 致动器设置在并且部分地限定差压通道。 致动器具有压力可移动部件，该压力可移动部件可响应于由固定流动面积孔口产生的差压的变化而运动。 旁通通道装置包括可响应于致动器的压力可移动部分的运动而可操作地连接到致动器的压力可移动部分并且在流动面积中可变的差压响应可变孔口。
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公开(公告)号：US4958695A
公开(公告)日：1990-09-25
申请号：US138479
申请日：1987-12-28
申请人： Koh Uchida , Takashi Kurihara
发明人： Koh Uchida , Takashi Kurihara
CPC分类号： B62D6/00 , Y10T137/86726
摘要： A control valve includes valve elements relatively displaceable in response to a predetermined variable (e.g., a steering torque) to define therebetween two parallel fluid flow paths connected between a fluid source and a fluid reservoir to produce pressure difference in a power cylinder. The control valve comprises a bypass path provided with a variable flow orifice that has an orifice area variable in response to said predetermined variable and an externally controlled variable flow orifice valve that has an orifice area variable in response to a second predetermined variable which is different from the first predetermined variable.
摘要翻译： 控制阀包括响应于预定变量（例如，转向转矩）相对可移位的阀元件，以在两个平行的流体流动路径之间限定两个平行的流体流动路径，其连接在流体源和流体储存器之间以产生动力缸中的压力差。 控制阀包括设置有可变流量孔口的旁路，该可变流量孔口具有响应于所述预定变量而可变的孔口面积和外部控制的可变流量孔口阀，其具有响应于与第二预定变量不同的第二预定变量而变化的孔口面积 第一预定变量。
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公开(公告)号：US4860635A
公开(公告)日：1989-08-29
申请号：US44065
申请日：1987-04-29
申请人： Koh Uchida , Takashi Kurihara
发明人： Koh Uchida , Takashi Kurihara
CPC分类号： B62D6/00 , B62D5/083 , Y10T137/86662 , Y10T137/87177
摘要： A steering control valve for a power steering system for a vehicle includes a valve structure which defines a plurality of variable flow orifices as steering input torque is applied thereby creating pressure differential acting on fluid motor. A solenoid operated variable flow orifice valve is operable in response to a control factor, such as vehicle speed, other than the steering input torque defines a variable flow orifice connected in series with one of the plurality of variable flow orifices.
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