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    • 82. 发明授权
    • Change-speed system for utility vehicle
    • 多用途车变速系统
    • US06955628B2
    • 2005-10-18
    • US10656891
    • 2003-09-05
    • Toshiya FukumotoNorifumi Adachi
    • Toshiya FukumotoNorifumi Adachi
    • F16H61/04F16H61/06B60K41/28B60K41/02
    • F16H61/061F16H2059/0226Y10T477/30Y10T477/638Y10T477/75Y10T477/78
    • A change-speed system for a utility vehicle includes a gear change-speed device operated for change speed in response to an operation of an actuator, a hydraulic clutch for selectively engaging/disengaging power transmission to the gear change-speed device, a current-controlled valve mechanism for feeding pressure oil to the hydraulic clutch and a hydraulic clutch controlling portion for controlling oil pressure in the hydraulic clutch by controlling a value of electric current to the valve mechanism. The hydraulic clutch controlling portion is operable to initiate a disengaging process of the hydraulic clutch based on initiation of the operation of the actuator and operable also to initiate an engaging process of the hydraulic clutch based on completion of the operation of the actuator. The engaging process of the hydraulic clutch includes a first engaging sub-process for rapidly raising the oil pressure to the hydraulic clutch for a predetermined period and a second engaging sub-process for gradually raising the oil pressure to the hydraulic clutch which has been temporarily dropped subsequent to the first sub-process. There is provided a manual setting device for adjusting the value of the electric current to the valve mechanism from the hydraulic clutch controlling portion in the second engaging sub-process.
    • 用于多用途车的变速系统包括响应于致动器的操作而变速的变速装置,用于选择性地接合/分离到变速装置的动力传递的液压离合器, 控制阀机构,用于向液压离合器供给压力油;以及液压离合器控制部分,用于通过控制与阀机构的电流值来控制液压离合器中的油压。 液压离合器控制部分可操作以基于启动致动器的操作而启动液压离合器的分离过程,并且还可以基于致动器的操作完成来启动液压离合器的接合过程。 液压离合器的接合过程包括用于将油压快速提升到液压离合器预定时间段的第一接合子过程和用于逐渐提高已经暂时下降的液压离合器的油压的第二接合子过程 在第一个子过程之后。 提供了一种用于在第二接合子处理中从液压离合器控制部分调节到阀机构的电流值的手动设置装置。