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    • 6. 发明授权
    • Spool-type control valve assembly with reduced spool stroke for
hydraulic belt-and-pulley type continuously variable transmission
    • 用于液压皮带式和无级变速传动的滑阀行程减少的阀芯式控制阀组件
    • US4653353A
    • 1987-03-31
    • US684734
    • 1984-12-21
    • Hiroshi ItohTeruo AkashiMitsuru Takada
    • Hiroshi ItohTeruo AkashiMitsuru Takada
    • F16H61/662B60K41/16
    • F16H61/66259Y10T477/62429
    • A hydraulic control system for a continuously variable transmission having a cylinder for changing the effective diameter of a pulley to control a speed ratio of the transmission. The control system comprises a spool valve assembly communicating with the cylinder to control the supply and discharge flows of a fluid to and from the cylinder. The valve assembly comprises a shift-speed control valve unit for controlling a rate of variation in the speed ratio of the transmission. The shift-speed control valve unit has only two discharge ports associated with the fluid discharge from the cylinder. The shift-speed control valve unit may take the form of a spool valve having a spool axially movable to open and close the ports to permit and restrict the fluid flows through supply and discharge conduits communicating with the ports and the cylinder. The spool may only partially open the corresponding port to permit the fluid flow therethrough for supplying or discharging the fluid. The valve assembly may comprise a shift-direction switching valve unit for changing the direction in which the speed ratio is varied. The switching valve unit has only two discharge ports associated with the fluid discharge from the cylinder.
    • 一种用于无级变速器的液压控制系统,其具有用于改变滑轮的有效直径的气缸,以控制变速器的速比。 控制系统包括与气缸连通的滑阀组件,以控制流体与气缸的供给和排出流。 阀组件包括用于控制变速器的变速比的变化率的换挡速度控制阀单元。 换档速度控制阀单元仅具有与来自气缸的流体排出相关联的两个排出口。 换档速度控制阀单元可以采用滑阀的形式,该滑阀具有可轴向移动以便打开和关闭端口的阀芯,以允许和限制流体流过与端口和气缸连通的供应和排出管道。 阀芯可以仅部分地打开相应的端口,以允许流体流过其中以供给或排出流体。 阀组件可以包括用于改变速度比改变的方向的换档方向切换阀单元。 切换阀单元仅具有与来自气缸的流体排放相关联的两个排出口。
    • 9. 发明授权
    • Accumulator control device for hydraulic control device for automatic
transmission for vehicle with engine load dependent backup control
    • 用于车辆自动变速器液压控制装置的蓄能器控制装置,具有发动机负载依赖的备用控制
    • US4995284A
    • 1991-02-26
    • US388515
    • 1989-08-02
    • Mitsuru TakadaHiroshi ItohTokuyuki TakahashiMakoto Funahashi
    • Mitsuru TakadaHiroshi ItohTokuyuki TakahashiMakoto Funahashi
    • F16H59/14F16H61/02F16H61/06F16H61/10F16H61/21
    • F16H61/061F16H61/10F16H2059/743F16H2061/0255F16H2061/1236F16H59/14F16H61/067F16H61/21Y10T477/69378
    • A hydraulic control device for generating a hydraulic pressure for a back pressure chamber of an accumulator in a speed stage shifting device of an automatic transmission for a vehicle such as an automobile is adapted to generate a hydraulic pressure to be supplied to the back pressure chamber of the accumulator by modulating the so-called line hydraulic pressure according to a balance between the modulated pressure itself and the line hydraulic pressure or more desirably an engine power simulation pressure modulated from the line hydraulic pressure to be lower than the line hydraulic pressure in low engine output operation under an influence of a signal hydraulic pressure controlled by an electromagnetic valve, wherein the signal hydraulic pressure decreases to substantially zero when the electromagnetic valve fails, and the accumulator control valve has a spool element having a first pressure receiving area exposed to the modulated hydraulic pressure to generate a positive feedback effect of decreasing the modulated hydraulic pressure along with increase thereof and a second pressure receiving area so that the accumulator control valve variably operates even when the signal pressure has decreased to zero exposed to the line hydraulic pressure or the engine power simulation pressure to generate an effect of increasing the modulated pressure, the first pressure receiving area having an effective pressure responsive sectional area substantially equal in the magnitude and opposite in the orientation to that of the second pressure receiving area.
    • 一种用于在汽车等车辆用自动变速器的变速级变速装置中产生蓄压器的背压室的液压的液压控制装置,其特征在于,能够产生向所述背压室供给的液压 蓄能器根据调制压力本身和线路液压之间的平衡调节所谓的线路液压,或更理想地是从线路液压调制的发动机功率模拟压力低于低发动机中的液压压力 在由电磁阀控制的信号液压的影响下的输出操作,其中当电磁阀故障时,信号液压降至基本为零,并且蓄能器控制阀具有卷轴元件,其具有暴露于调制的第一受压区域 液压产生正反馈e 降低调制液压以及第二压力接收区域的功能,使得即使当信号压力已经下降到零暴露于线路液压或发动机功率模拟压力以产生效果时,蓄能器控制阀也可变地运行 增加调制压力,第一压力接收区域具有在大小上基本相等的有效的压力响应截面面积,并且在取向方向上与第二压力接收区域的取向相反。