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    • 1. 发明授权
    • Hydraulic power steering apparatus
    • 液压动力转向装置
    • US5474145A
    • 1995-12-12
    • US304923
    • 1994-09-13
    • Kyosuke HagaMiko SuzukiKenichi FukumuraHideya KatoSeiho KawakamiKaname Saito
    • Kyosuke HagaMiko SuzukiKenichi FukumuraHideya KatoSeiho KawakamiKaname Saito
    • B62D5/07B62D5/06B62D6/02
    • B62D6/02B62D5/062
    • 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.
    • 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。
    • 4. 发明授权
    • Testing apparatus of steering system
    • 转向系统试验装置
    • US5700951A
    • 1997-12-23
    • US654592
    • 1996-05-29
    • Tatsuya SagiyamaFumihiko BabaKaname SaitoTakashi MatsushimaHitoshi Iizuka
    • Tatsuya SagiyamaFumihiko BabaKaname SaitoTakashi MatsushimaHitoshi Iizuka
    • G01M17/06
    • G01M17/06
    • A testing apparatus of a steering system is provided to correctly detect load in a direction in which steering reaction force acts, the load being applied to the steering system. A tie rod connected to a rack of the steering system is connected to a steering-angle vibrating unit via a torque lever, relay links and a drive link. A front link of the drive link and a link disposed parallel to the torque lever are provided in a swingable manner. Both ends of each of the relay links are respectively connected to the torque lever and the link disposed parallel to the torque lever, and the torque lever is swingable with respect to the link in a direction in which road-surface reaction force acts. Transducers are provided at intermediate portions of the relay links, respectively. A vertically-vibrating unit is connected via the torque lever to the rack.
    • 提供了一种转向系统的测试装置,以正确地检测转向反作用力作用的方向上的负载,该负载被施加到转向系统。 连接到转向系统的齿条的拉杆通过扭矩杆,中继链路和驱动连杆连接到转向角振动单元。 以可摆动的方式设置驱动连杆的前连杆和平行于转矩杆设置的连杆。 每个继电器连杆的两端分别连接到扭矩杆和与扭矩杆平行设置的连杆,并且扭矩杆能够在路面反作用力作用的方向上相对于连杆摆动。 传感器分别设置在中继链路的中间部分。 垂直振动单元通过扭矩杆连接到机架。