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    • 74. 发明专利
    • Variable displacement pump
    • 可变位移泵
    • JP2011111926A
    • 2011-06-09
    • JP2009266950
    • 2009-11-25
    • Hitachi Automotive Systems Ltd日立オートモティブシステムズ株式会社
    • SAGA KOJIONISHI HIDEAKIWATANABE YASUSHI
    • F04C14/22
    • F04C2/3442F04C14/226F04C15/0049F04C2270/12F04C2270/14
    • PROBLEM TO BE SOLVED: To provide a variable displacement pump reducing power loss by keeping pump discharge pressure close to necessary oil pressure. SOLUTION: This variable displacement pump includes a pump structural member discharging lubricating oil which is introduced to a plurality of pump chambers 13 from an suction port 7, to an inside of an engine and a variable valve gear from a discharge port 8 by receiving volume change of pump chambers. Volume of the pump chambers is changed by oscillating a cam ring 5 by discharge pressure supplied into a control oil chamber 16. A first coil spring 20 forcing the cam ring in a direction for increasing volume of the pump chambers, and a second coil spring 21 forcing the cam ring in a direction for reduce volume of the pump chambers are provided on both sides of an arm 17 in a manner so as to be opposed to each other. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:通过将泵排出压力保持在接近必要的油压的方式来提供可变排量泵来减小功率损失。 解决方案:该可变排量泵包括排出润滑油的泵结构件,该润滑油从吸入口7引入多个泵室13,从排出口8引入发动机内部和可变阀齿轮,通过 接收泵室的体积变化。 通过将供给到控制油室16的排出压力摆动到凸轮环5来改变泵室的容积。第一螺旋弹簧20迫使凸轮环沿着增大泵室容积的方向,第二螺旋弹簧21 为了减小泵室的体积的方向迫使凸轮环以彼此相对的方式设置在臂17的两侧。 版权所有(C)2011,JPO&INPIT