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    • 4. 发明授权
    • Oil pump apparatus
    • 油泵设备
    • US06299418B1
    • 2001-10-09
    • US09148510
    • 1998-09-04
    • Susumu HonagaHidetoshi FujiwaraMotoyasu Yamamori
    • Susumu HonagaHidetoshi FujiwaraMotoyasu Yamamori
    • F04B2300
    • F04C14/26
    • An oil pump apparatus, including a pump mechanism portion for discharging operating fluid, a valve-receiving bore formed in a housing, a flow control valve arranged in the valve-receiving bore connected to a bypass hole, and a bypass passage. The bypass passage is connected to the bypass hole, having a space radially extending from an edge of the bypass hole in a fluid stream direction of the excess operating fluid spouting from an opening area of the bypass hole. When fluid stream of the excess operating fluid reaches the inner surface of the bypass passage, the pressure of the excess operating fluid has been weaken sufficiently because fluid stream of the excess operating fluid is diffused by the long span of the bypass passage extended from the edged of the bypass hole. Therefore, the inner surface of the bypass passage is protected from cavitation damages and erosion.
    • 一种油泵装置,包括用于排放工作流体的泵机构部分,形成在壳体中的阀接收孔,布置在连接到旁通孔的阀接收孔中的流量控制阀和旁通通道。 旁通通路连接到旁通孔,该旁路孔具有从旁通孔的边缘沿着从旁通孔的开口区域喷出的多余的工作流体的流体流动方向径向延伸的空间。 当多余的工作流体的流体流到达旁通通道的内表面时,过量的工作流体的压力已经被充分削弱,因为过量的工作流体的流体流被从边缘延伸的旁路通道的长跨度扩散 的旁路孔。 因此,保护​​旁通通道的内表面免受空穴破坏和侵蚀。
    • 5. 发明授权
    • Vane type rotary pump having a discharge port with a tapered bearded
groove
    • 叶片式旋转泵具有带锥形胡须槽的排出口
    • US6068461A
    • 2000-05-30
    • US931961
    • 1997-09-17
    • Kyosuke HagaHidetoshi FujiwaraMotoyasu Yamamori
    • Kyosuke HagaHidetoshi FujiwaraMotoyasu Yamamori
    • F04C2/344F04C15/00
    • F04C15/0049
    • A vane type rotary pump including a stator housing, a cam ring formed at its inner periphery with a cam surface and mounted within the stator housing, a pair of end wall structures fitted to the opposite ends of the cam ring to form a pump cavity in the cam ring, a drive shaft rotatably mounted within the stator housing and extending into the interior of the pump cavity through one of the end wall structures, a rotor contained within the cam ring and mounted on the drive shaft for rotation therewith, and a plurality of circumferentially equally spaced vanes slidably fitted into the body of the rotor to move radially outward from the rotor and cooperating with the cam surface of the cam ring to form a plurality of expandable pump chambers, wherein one of the end wall structures is formed at its inside face with a suction port at a portion where the pump chambers expand as the vanes move radially outward and is formed at its inside face with a discharge port at a portion where the pump chambers contract as the vanes move radially inward and a bearded groove tapered from a forward end of the discharge port in a direction opposite to a rotational direction of the rotor; the vane type rotary pump being characterized in that the bearded groove is formed with an introducing portion the surface of which is inclined into the interior of the discharge port.
    • 一种叶片式旋转泵,包括定子壳体,在其内周形成有凸轮表面并安装在定子壳体内的凸轮环,安装在凸轮环的相对端部上的一对端壁结构,以形成泵腔 所述凸轮环可旋转地安装在所述定子壳体内并通过所述端壁结构中的一个延伸到所述泵腔的内部;驱动轴,其包含在所述凸轮环内并安装在所述驱动轴上以与其一起旋转;以及多个 周向等间距的叶片可滑动地装配到转子的主体中以从转子径向向外移动并与凸轮环的凸轮表面协作以形成多个可膨胀的泵室,其中一个端壁结构形成在其中 在泵室在径向向外移动的同时在泵室膨胀的部分处具有吸入口的内表面,并且在其内表面处形成有在泵c的部分处的排出口 当叶片沿径向向内移动时,锤子收缩,并且从排出口的前端沿与转子的旋转方向相反的方向渐缩的胡须槽; 所述叶片式旋转泵的特征在于,所述胡须槽形成有导入部,所述导入部的表面倾斜到所述排出口的内部。
    • 7. 发明授权
    • Control apparatus for power-assisted steering system
    • 动力辅助转向系统控制装置
    • US4606423A
    • 1986-08-19
    • US657408
    • 1984-10-03
    • Hidetoshi FujiwaraTetsushi Kawamura
    • Hidetoshi FujiwaraTetsushi Kawamura
    • B62D6/00B62D5/04B62D5/06B62D6/02
    • B62D5/061
    • In a power-assisted steering system including a steering shaft arranged to be rotated by steering effort applied thereto, a fluid pump driven by a prime mover of the vehicle, a hydraulic cylinder having a power piston mounted for reciprocating movement in the cylinder and operatively connected to driven members of the steering system, and a servo valve interconnecting the fluid pump and the cylinder and being responsive to rotary motion of the steering shaft for selectively directing the flow of fluid under pressure from the pump to one of opposite fluid chambers of the cylinder and permitting the flow of fluid from the other fluid chamber to a fluid reservoir to effect reciprocating movement of the power piston, an electrically operated control valve of the normally closed type is disposed within a bypass passage between the opposite fluid chambers of the cylinder to permit the flow of fluid passing through the bypass passage in its energized condition so as to restrain rapid increase of the pump load during maneuvers of the vehicle. The control valve is arranged to be energized when the power piston approaches to its stroke end.
    • 在包括转向轴的动力辅助转向系统中,所述转向轴被布置成通过施加到其上的转向力来转动,由所述车辆的原动机驱动的流体泵,具有安装用于在所述气缸中往复运动的动力活塞的液压缸,并且可操作地连接 转向系统的被驱动构件以及连接流体泵和气缸并且响应于转向轴的旋转运动的伺服阀,用于选择性地将压力下的流体流从泵引导到气缸的相对流体室中的一个 并且允许流体从另一个流体室流到流体储存器以实现动力活塞的往复运动,常闭型的电动操作的控制阀设置在气缸的相对的流体室之间的旁通通道内以允许 在通电状态下通过旁路通路的流体流动,以抑制快速增加 在车辆操纵期间的泵载荷。 控制阀被布置成当动力活塞接近其行程端时被激励。