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    • 6. 发明授权
    • System and method for hydraulically controlling automatic transmission
    • 液压控制自动变速器的系统和方法
    • US07112154B2
    • 2006-09-26
    • US10720697
    • 2003-11-25
    • Tatsuo WakaharaYoshihisa KodamaMasahiro YamamotoTaichirou Yokoyama
    • Tatsuo WakaharaYoshihisa KodamaMasahiro YamamotoTaichirou Yokoyama
    • F16H61/06F16H61/662
    • F16H61/66259F16H61/0021F16H2061/0253Y10T477/34Y10T477/624
    • Hydraulic control system and method for an automatic transmission. The hydraulic control system includes a hydraulic pressure source, a flow rate control valve having a spool with an orifice and a drain hole, stroke position determining means, and pressure regulator means. The stroke position determining means determines that the spool is displaced from a large spool-stroke position where a communication area of the drain hole is not less than a first predetermined area, to a small spool-stroke position where the communication area is not more than a second predetermined area. The pressure regulator means regulates a hydraulic oil pressure downstream of the orifice and corrects the hydraulic oil pressure downstream of the orifice by adding a predetermined correction amount for a first predetermined time when the stroke position determining means determines that the spool is displaced from the large stroke position to the small stroke position.
    • 液压控制系统及自动变速箱方法。 液压控制系统包括液压源,流量控制阀,其具有带孔的阀芯和排水孔,冲程位置确定装置和压力调节器装置。 行程位置确定装置确定阀芯从排水孔的通信区域不小于第一预定区域的大的阀芯行程位置移动到通信区域不大于的小的阀芯行程位置 第二预定区域。 压力调节器装置调节孔口下游的液压油压力,并且当行程位置确定装置确定阀芯从大冲程位移时,通过在第一预定时间内增加预定的校正量来校正孔口下游的液压油压力 位置到小行程位置。