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公开(公告)号：US5577573A
公开(公告)日：1996-11-26
申请号：US357757
申请日：1994-12-16
申请人： Kyosuke Haga , Mikio Suzuki , Yoshiharu Inaguma , Kenichi Fukumura , Hideya Kato
发明人： Kyosuke Haga , Mikio Suzuki , Yoshiharu Inaguma , Kenichi Fukumura , Hideya Kato
摘要： A hydraulic power steering system includes a pump, a flow control valve, and a bypass control valve. The flow control valve responds to a pressure drop across a metering orifice disposed in a fluid supply passage so as to control the flow rate of operating fluid by bypassing a part of the operating fluid to a reservoir. A spring chamber of the flow control valve is connected to the supply passage through a control orifice. The bypass control valve is disposed between the spring chamber and the reservoir so as to increase the amount of bypassed fluid by controlling the pressure in the spring chamber. The bypass control valve has a control spool, a load pressure introduction port connected to the upstream side of the control orifice for leading the load pressure to a first end of the control spool and a pilot port connected to the downstream side of the control orifice for leading the pressure in the spring chamber of the flow control valve to a second end of the control spool. Moreover, a pressure receiving area of the second end of the control spool is smaller than that of the first end of the control spool. Accordingly, a spring having a small spring constant can be used in the bypass control valve, even when the control spool is controlled within a short stroke. Further, the control spool, the load pressure introduction port, and the pilot port are formed in a sleeve.
摘要翻译： 液压动力转向系统包括泵，流量控制阀和旁通控制阀。 流量控制阀响应设置在流体供应通道中的计量孔的压降，以便通过将一部分工作流体绕过储存器来控制工作流体的流量。 流量控制阀的弹簧室通过控制孔连接到供给通道。 旁通控制阀设置在弹簧室和储存器之间，以通过控制弹簧室中的压力来增加旁路流体的量。 旁通控制阀具有控制阀芯，连接到控制孔的上游侧的负载压力引入口，用于将负载压力引导到控制阀芯的第一端，以及连接到控制孔的下游侧的先导端口， 将流量控制阀的弹簧室中的压力引导到控制阀芯的第二端。 此外，控制阀芯的第二端的受压面积小于控制阀芯的第一端的受压面积。 因此，即使控制阀芯在短行程内被控制，也可以在旁通控制阀中使用弹簧常数小的弹簧。 此外，控制阀芯，负载压力引入口和先导端口形成在套筒中。
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公开(公告)号：US5439070A
公开(公告)日：1995-08-08
申请号：US75307
申请日：1993-06-11
申请人： Kyosuke Haga , Mikio Suzuki , Yoshiharu Inaguma , Kenichi Fukumura , Hideya Kato , Katsuhisa Mori
发明人： Kyosuke Haga , Mikio Suzuki , Yoshiharu Inaguma , Kenichi Fukumura , Hideya Kato , Katsuhisa Mori
CPC分类号： B62D6/02 , B62D5/083 , F04B49/225 , F04B2205/06 , F04B2205/08 , F15B2211/45
摘要： A power steering apparatus having a hydraulic pump for outputting a pressurized fluid, an assist force generation mechanism hydraulically connected to the pump through a supply passage to generate an assist force in response to rotation of a steering wheel, wherein the assist force generation mechanism has a characteristic that the back pressure thereof increases when the steering wheel is rotated. The power steering apparatus further comprises a flow control valve having a spool which is moved in response to a pressure drop at a metering orifice disposed in the middle of the supply passage, so as to control the flow rate of the pressurized fluid to be constant. The spring chamber of the flow control valve is connected to a reservoir through a drain passage, and a drain valve is disposed in the drain passage for allowing the flow of pressurized fluid from the spring chamber to the reservoir when the back pressure of the assist force generation mechanism is low, and for prohibiting the flow of the pressurized fluid when the back pressure of the assist force generation mechanism increases.
摘要翻译： 一种动力转向装置，其具有用于输出加压流体的液压泵，辅助力产生机构，其通过供给通道与泵液压连接，以产生响应于方向盘旋转的辅助力，其中辅助力产生机构具有 其特征在于当方向盘旋转时其背压增加。 动力转向装置还包括流量控制阀，该流量控制阀具有响应于设置在供给通道中间的计量孔口处的压降而移动的阀芯，以便控制加压流体的流量恒定。 流量控制阀的弹簧室通过排水通道连接到储存器，并且排水阀设置在排水通道中，用于当加压流体从弹簧室流到储存器时，当辅助力的背压 发电机构低，并且当辅助力产生机构的背压增加时禁止加压流体的流动。
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公开(公告)号：US5471838A
公开(公告)日：1995-12-05
申请号：US219351
申请日：1994-03-29
申请人： Mikio Suzuki , Kenichi Fukumura , Hideya Kato
发明人： Mikio Suzuki , Kenichi Fukumura , Hideya Kato
CPC分类号： B62D6/02
摘要： A power steering apparatus for a motor vehicle is provided with a metering orifice arranged on a supply passage and a flow control device in parallel relation with the metering orifice. The flow control valve includes a spool and a spring and moves the spool against the force of the spring in response to the pressure difference across the metering orifice for returning an excess part of operating fluid discharged from an engine-driven pump to an intake side of the pump so as to keep the flow rate towards a power assist gear unit almost constant regardless of changes in rotational speed of the pump. A drooping device cooperating with the flow control valve is provided comprising a control orifice at the upstream of the metering orifice and a bypass valve in communication with a spring chamber of the flow control valve retaining the spring. When the pressure difference across the control orifice exceeds a predetermined value with the increase in the pump rotational speed to a predetermined speed, the bypass valve operates to drain the pressure in the spring chamber. The load acting on the pump is thereby relieved. A bypass control valve is responsive to the pressure at the downstream of the metering orifice so as to restrict the draining of the pressure in the spring chamber when the power assist gear unit is brought into operation.
摘要翻译： 一种用于机动车辆的动力转向装置设置有设置在供给通道上的计量孔和与计量孔平行的流量控制装置。 流量控制阀包括阀芯和弹簧，并响应于跨越计量孔的压差而相对于弹簧的力移动阀芯，用于将从发动机驱动的泵排出的多余的工作流体返回至 泵，以便保持朝向动力辅助齿轮单元的流量，而不管泵的转速如何变化。 提供与流量控制阀配合的下垂装置，其包括在计量孔的上游的控制孔和与保持弹簧的流量控制阀的弹簧室连通的旁通阀。 当控制孔的压力差随着泵旋转速度增加到预定速度时超过预定值时，旁通阀操作以排出弹簧室中的压力。 从而减轻作用在泵上的负荷。 旁通控制阀响应于计量孔口下游的压力，以限制当动力辅助齿轮装置运行时弹簧室中的压力的排出。
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公开(公告)号：US5515938A
公开(公告)日：1996-05-14
申请号：US138963
申请日：1993-10-21
申请人： Kyosuke Haga , Mikio Suzuki , Yoshiharu Inaguma , Kenichi Fukumura , Hideya Kato , Katsuhisa Mori
发明人： Kyosuke Haga , Mikio Suzuki , Yoshiharu Inaguma , Kenichi Fukumura , Hideya Kato , Katsuhisa Mori
CPC分类号： B62D6/02 , B62D5/083 , F04B49/225 , F04B2205/06 , F04B2205/08
摘要： A power steering apparatus having a fluid source for discharging pressurized fluid, a power cylinder, a control valve responsive to operation of a steering wheel for supplying the power cylinder with pressurized fluid from the fluid source, and a reservoir. The control valve has a first control portion for controlling the flow of pressurized fluid from the fluid source to the reservoir, and a second control portion for controlling the flow of pressurized fluid to the power cylinder. The first control portion has two paths connecting the fluid source and the reservoir, each of the paths being formed with at least one variable orifice of a center-open type which opens when the control valve is in a neutral state. The second control portion has two supply paths communicating with the fluid source and a pair of chambers of the power cylinder, each of the supply paths being formed with a variable orifice of a center-close type which closes when the control valve is in the neutral state, and two drain paths communicating with the pair of chambers and the reservoir, each of the drain paths being formed with a variable orifice of a center-open type which opens when the control valve is in the neutral state.
摘要翻译： 一种动力转向装置，具有用于排出加压流体的流体源，动力缸，响应于操作方向盘的控制阀，用于向动力缸提供来自流体源的加压流体和储存器。 控制阀具有用于控制加压流体从流体源流向储存器的第一控制部分和用于控制加压流体流向动力缸的第二控制部分。 第一控制部分具有连接流体源和储存器的两条路径，每个路径形成有至少一个中心开放型可变孔口，当可控制阀处于空档状态时，其可打开。 第二控制部具有与流体源和动力缸的一对腔室连通的两个供给路径，每个供给路径形成有中心关闭型的可变孔口，当控制阀处于中立状态时，该可变孔口关闭 状态和与所述一对室和所述储存器连通的两个排放路径，每个所述排水路径形成有当所述控制阀处于中立状态时打开的中心开式的可变孔口。
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公开(公告)号：US5474145A
公开(公告)日：1995-12-12
申请号：US304923
申请日：1994-09-13
申请人： Kyosuke Haga , Miko Suzuki , Kenichi Fukumura , Hideya Kato , Seiho Kawakami , Kaname Saito
发明人： Kyosuke Haga , Miko Suzuki , Kenichi Fukumura , Hideya Kato , Seiho Kawakami , Kaname Saito
摘要： A hydraulic power steering system includes a pump, a flow control valve, and a bypass control valve. The flow control valve responds to a pressure drop across a metering orifice disposed in a fluid supply passage so as to control the flow rate of operational fluid by bypassing part of the operational fluid to a reservoir. A spring chamber of the flow control valve is connected to the supply passage through a control orifice. The bypass control valve is disposed between the spring chamber and the reservoir so as to increase the amount of bypassed fluid by controlling the pressure in the spring chamber. The bypass control valve has a control spool, a load pressure introduction port connected to the upstream side of the control orifice for leading the load pressure to a first end of the control spool and a pilot port connected to the downstream side of the control orifice for leading the pressure in the spring chamber of the flow control valve to a second end of the control spool. Moreover, a pressure receiving area of the second end of the control spool is smaller than that of the first end of the control spool. Accordingly, a spring having a small spring constant can be used in the bypass control valve, even when the control spool is controlled within a short stroke.
摘要翻译： 液压动力转向系统包括泵，流量控制阀和旁通控制阀。 流量控制阀响应设置在流体供应通道中的计量孔的压降，以便通过将部分操作流体旁路到储存器来控制操作流体的流速。 流量控制阀的弹簧室通过控制孔连接到供给通道。 旁通控制阀设置在弹簧室和储存器之间，以通过控制弹簧室中的压力来增加旁路流体的量。 旁通控制阀具有控制阀芯，连接到控制孔的上游侧的负载压力引入口，用于将负载压力引导到控制阀芯的第一端，以及连接到控制孔的下游侧的先导端口， 将流量控制阀的弹簧室中的压力引导到控制阀芯的第二端。 此外，控制阀芯的第二端的受压面积小于控制阀芯的第一端的受压面积。 因此，即使控制阀芯在短行程内被控制，也可以在旁通控制阀中使用弹簧常数小的弹簧。
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公开(公告)号：US07128542B2
公开(公告)日：2006-10-31
申请号：US10432615
申请日：2001-12-03
申请人： Mikio Suzuki , Yoshiharu Inaguma , Keiji Suzuki , Hideya Kato , Tsuyoshi Ikeda
发明人： Mikio Suzuki , Yoshiharu Inaguma , Keiji Suzuki , Hideya Kato , Tsuyoshi Ikeda
CPC分类号： F04C14/226
摘要： In a hydraulic pump, a cam ring is provided in a cylindrical adaptor for movement in a radial direction, and a differential pressure control valve is provided to control internal pressure and load pressure at the front and back sides of a variable orifice to be introduced into action chambers and formed at the opposite sides of the cam ring for controlling a discharge amount of the pump in accordance with the rotation speed of the pump. The differential pressure control valve is operated under the internal pressure and load pressure respectively introduced into action chambers and the load of a thrust spring biasing the differential pressure control valve toward the internal pressure chamber. The load of the thrust spring is increased or decreased in accordance with an increase or a decrease of the load pressure. The increase or decrease of the load pressure is effected by a load pressure responsive piston loaded by a thrust spring and engaged with the differential pressure control valve at one end thereof in the internal pressure chamber.
摘要翻译： 在液压泵中，凸轮环设置在圆筒形适配器中以沿径向移动，并且设置差压控制阀以控制可变孔口的前后侧的内部压力和负载压力以被引入 动作室，形成在凸轮环的相对侧，用于根据泵的转速来控制泵的排出量。 差压控制阀在分别引入动作室的内部压力和负载压力以及将差压控制阀向内部压力室偏压的推力弹簧的负载下操作。 推力弹簧的载荷根据负载压力的增加或减小而增加或减少。 负载压力的增加或减小由负载压力响应活塞负载，由负载弹簧加载，并与压力控制阀在其内部压力室中的一端接合。
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公开(公告)号：US5651423A
公开(公告)日：1997-07-29
申请号：US452699
申请日：1995-05-30
申请人： Kyosuke Haga , Mikio Suzuki , Yoshiharu Inaguma , Hideya Kato
发明人： Kyosuke Haga , Mikio Suzuki , Yoshiharu Inaguma , Hideya Kato
摘要： A hydraulic power steering apparatus includes a motor-driven pump which discharges pressurized working fluid at a flow rate proportional to the rotational speed. A load-pressure responsive valve is connected to a discharge passage to which the pressurized fluid is discharged from the pump. The load-pressure responsive valve bypasses the pressurized fluid to a reservoir when the control valve is in a neutral state, thereby reducing the amount of the pressurized fluid supplied to the control valve, and increases the amount of the pressurized fluid supplied to the control valve when the load pressure of the pump increases upon operation of the control valve. With this control, the energy consumed by the pump can be reduced.
摘要翻译： 液压动力转向装置包括电动泵，其以与转速成比例的流量排出加压工作流体。 负载压力响应阀连接到排出通道，加压流体从泵排出。 当控制阀处于中立状态时，负载压力响应阀将加压流体旁路到储存器，从而减少供给到控制阀的加压流体的量，并且增加供给到控制阀的加压流体的量 当操作控制阀时泵的负载压力增加。 通过这种控制，可以减少泵消耗的能量。
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公开(公告)号：US5226802A
公开(公告)日：1993-07-13
申请号：US910234
申请日：1992-07-09
申请人： Keiichi Nakamura , Yoshiharu Inaguma , Hideya Kato
发明人： Keiichi Nakamura , Yoshiharu Inaguma , Hideya Kato
CPC分类号： F04C14/26 , F01C21/0863
摘要： A variable-displacement vane pump apparatus is composed of a pump part and a switching valve. The pump part is comprised of a housing, a cam ring, a rotor, plural vanes, side plates, two pairs of intake and exhaust ports formed on the side plates, discharge pressure chambers connecting with the discharge ports, and an intake chamber connected with the intake ports. The pump part is divided into first and second pump portions, and only one of the pump portions is activated by the operation of the switching valve when the load pressure is low. Under such condition, the fluid discharged from the particular pump portion is returned to its intake port. Also, the flow rate of the operation fluid discharged from the pump is adjusted by the flow control valve by returning part of pressurized fluid into the inlet ports. A fluid supplied from a reservoir is energized two times by supercharge effect utilizing the returned fluid from the switching valve and the returned fluid from the flow control valve. The vane pump is further provided with a special arrangement to lower the pressure at the bottoms of slits receiving the vanes at the time period when the slits located in the particular pump portion, thereby reducing the energy loss.
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公开(公告)号：US6041807A
公开(公告)日：2000-03-28
申请号：US057550
申请日：1998-04-09
申请人： Susumu Honaga , Hidetoshi Fujiwara , Yoshiharu Inaguma , Hideya Kato , Kazuhiro Watanabe , Takashi Imanishi
发明人： Susumu Honaga , Hidetoshi Fujiwara , Yoshiharu Inaguma , Hideya Kato , Kazuhiro Watanabe , Takashi Imanishi
IPC分类号： B62D5/06 , F15B11/042 , F15B11/05 , F15B13/00 , G05D11/03
CPC分类号： F15B11/05 , B62D5/062 , F15B11/042 , F15B11/0423 , F15B2013/008 , F15B2211/2053 , F15B2211/40515 , F15B2211/40561 , F15B2211/45 , F15B2211/455 , F15B2211/50509
摘要： A flow control device, responsive to the rotational speed of a pump and to load pressure, has a simple structure. And a housing of the flow control device for saving energy can make use of a general pump housing not for saving energy as a common housing.The flow control device of a power steering apparatus, arranged in a housing of a pump, includes a flow control valve and a load pressure responsive valve. The flow control valve includes a bypass spool with a control rod penetrating a metering orifice. The load pressure responsive valve is incorporated in a union for response to the load pressure. The control rod is located on the bypass spool for response to the rotational speed of the pump.
摘要翻译： 响应于泵的转速和负载压力的流量控制装置具有简单的结构。 并且用于节能的流量控制装置的壳体可以利用一般的泵壳体，而不是为了节省能量作为共同的壳体。 动力转向装置的流量控制装置，其配置在泵的壳体中，具有流量控制阀和负载压力响应阀。 流量控制阀包括具有穿过计量孔的控制杆的旁通阀芯。 负载压力响应阀被并入用于响应负载压力的联合。 控制杆位于旁路阀芯上以响应泵的转速。
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公开(公告)号：US5822988A
公开(公告)日：1998-10-20
申请号：US875110
申请日：1997-07-24
申请人： Hideya Kato
发明人： Hideya Kato
CPC分类号： F15B11/055 , B62D5/062 , F15B2211/30575 , F15B2211/3144 , F15B2211/40507 , F15B2211/40515 , F15B2211/40553 , F15B2211/41509 , F15B2211/41563 , F15B2211/45 , F15B2211/465 , F15B2211/88
摘要： In a flow control device for vehicles and like, a union 17 of a pump receives a load pressure responsive valve 24. The union 17 is provided with outlet port to supply operating fluid regulated by a flow control valve to a control valve. The load pressure responsive valve, received in the union, has a variable orifice. The load pressure responsive valve brings the spring chamber into communication with the reservoir when road pressure, caused by operation of a steering wheel, is relatively low and the load pressure responsive valve shuts the communication between the spring chamber and the reservoir in response to rising of the road pressure. Therefore, the flow control device provides the power saving caused by decreasing the flow rate supplied from the pump to the control valve at low load pressure without substantial improvement of a pump housing.
摘要翻译： PCT No.PCT / JP96 / 03438。 371日期1997年7月24日 102（e）1997年7月24日PCT PCT 1996年11月22日PCT公布。 WO97 / 18983 PCT出版物 日期：1997年5月29日在用于车辆等的流量控制装置中，泵的联管器17接收负载压力响应阀24.联接件17设置有出口端口，用于将由流量控制阀调节的操作流体供应到控制阀 。 接收在接头中的负载压力响应阀具有可变孔口。 当由方向盘的操作引起的道路压力相对较低时，负载压力响应阀使弹簧室与储存器连通，并且负载压力响应阀响应于弹簧室和储存器之间的连通而响应于 道路压力。 因此，流量控制装置提供了在低负载压力下将从泵供给到控制阀的流量减小而不会实质上改善泵壳体而导致的功率节省。
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