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    • 52. 发明授权
    • Hydraulic power steering apparatus
    • 液压动力转向装置
    • US5778756A
    • 1998-07-14
    • US828366
    • 1997-03-28
    • Kyosuke HagaMikio SuzukiKenichi Fukumura
    • Kyosuke HagaMikio SuzukiKenichi Fukumura
    • B62D5/07B62D5/06B62D5/083F15B11/08F16D31/02
    • B62D5/06
    • A hydraulic power steering apparatus includes a fluid pump, a power cylinder, a reservoir, and a control valve connected to the pump via a supply passage including a high pressure hose and connected to the reservoir via a drain passage. The power steering apparatus also includes a bypass passage provided between the supply passage and the drain passage, and a check valve which is disposed in the bypass passage to allow operation fluid to flow only in a direction from the drain passage to the supply passage. The power steering apparatus can supply a sufficient amount of operation fluid to the power cylinder even when a steering wheel is abruptly turned or when an opposing force is input from a tire.
    • 液压动力转向装置包括流体泵,动力缸,储存器和通过包括高压软管的供给通道连接到泵的控制阀,并且经由排水通道连接到储存器。 动力转向装置还包括设置在供给通道和排出通道之间的旁通通道,以及设置在旁通通道中的止回阀,以允许操作流体仅沿着从排放通道到供给通道的方向流动。 动力转向装置即使在方向盘突然转动时或者从轮胎输入相反的力量时,也能向动力缸提供足够量的操作流体。
    • 56. 发明授权
    • Hydraulic power steering apparatus
    • 液压动力转向装置
    • US5515938A
    • 1996-05-14
    • US138963
    • 1993-10-21
    • Kyosuke HagaMikio SuzukiYoshiharu InagumaKenichi FukumuraHideya KatoKatsuhisa Mori
    • Kyosuke HagaMikio SuzukiYoshiharu InagumaKenichi FukumuraHideya KatoKatsuhisa Mori
    • B62D5/083B62D6/02F04B49/22B62D5/06
    • B62D6/02B62D5/083F04B49/225F04B2205/06F04B2205/08
    • 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.
    • 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。
    • 57. 发明授权
    • Power steering apparatus
    • 动力转向装置
    • US5372214A
    • 1994-12-13
    • US34869
    • 1993-03-19
    • Kyosuke HagaKiyotaka KatoMikio SuzukiYoshiharu InagumaKeiji SuzukiMasanori NatsumeHironori Hibino
    • Kyosuke HagaKiyotaka KatoMikio SuzukiYoshiharu InagumaKeiji SuzukiMasanori NatsumeHironori Hibino
    • B62D5/065B62D5/10
    • B62D5/065
    • A power steering apparatus for turning a steerable wheel of a vehicle in response to steering operation by a driver. The apparatus comprises a hydraulic pump for pumping a fluid from a reservoir so as to supply pressurized fluid to a power cylinder formed in a gear housing through a direction control valve which is operable in response to rotation of the steering wheel for selectively delivering the pressurized fluid to pair of pressure chambers of the power cylinder. The apparatus further comprises an electric motor for rotating the hydraulic pump, an accumulator for accumulating the pressurized fluid discharged from the hydraulic pump, a detector for detecting the pressure of the pressurized fluid and for outputting a signal corresponding to the detected pressure, and a controller responsible to the signal from the detector for activating the electric motor only when the detected pressure is below a predetermined level. The hydraulic pump and the electric motor are mounted on the gear housing.
    • 一种用于响应于驾驶员的转向操作来转动车辆的可转向车轮的动力转向装置。 该装置包括用于从储存器泵送流体的液压泵,以便通过方向控制阀将加压流体供应到形成在齿轮壳体中的动力缸,该方向控制阀响应于方向盘的旋转而可操作以选择性地输送加压流体 到动力缸的一对压力室。 该装置还包括用于旋转液压泵的电动机,用于累积从液压泵排出的加压流体的蓄能器,用于检测加压流体的压力并输出对应于检测到的压力的信号的检测器,以及控制器 负责来自检测器的信号,用于仅在检测到的压力低于预定水平时启动电动机。 液压泵和电动机安装在齿轮箱上。