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    • 9. 发明授权
    • Automatic transmission control system
    • 自动变速器控制系统
    • US07713167B2
    • 2010-05-11
    • US11686435
    • 2007-03-15
    • Hideharu YamamotoKenichi KaizuHiroshi SekiguchiYukiyoshi InutaHiroki Kumashiro
    • Hideharu YamamotoKenichi KaizuHiroshi SekiguchiYukiyoshi InutaHiroki Kumashiro
    • F16H59/00
    • F16H61/061F16H3/66F16H59/72F16H61/686F16H2200/0052F16H2200/201F16H2306/44F16H2306/52Y10T477/653
    • An automatic transmissions control system varies times to start a shift to securing a good response in engagement pressure for an engagement-side frictional element as well as suppressing occurrence of hydraulic pressure vibrations at low temperatures. The control system has an engagement pressure at-low-temperature regulation section that selectively controls at least one of the first and second engagement-pressure regulator valves, when the oil temperature is detected to be lower than a predetermined oil temperature and the shift condition is determined to exist requiring a shift operation such that the first engagement-pressure regulator valve provides a maximum hydraulic pressure to engage the first frictional element to start a shift with the maximum hydraulic pressure being continuously provided until the shift ends, and/or the second engagement-pressure regulator valve provides a minimum hydraulic pressure to obtain complete disengagement of the second frictional element to start a downshift as the shift operation.
    • 自动变速器控制系统变化多次,以开始转换,以确保接合侧摩擦元件的接合压力的良好响应以及抑制低温下的液压振动的发生。 控制系统具有接合压力低温调节部,其选择性地控制第一和第二接合压力调节阀中的至少一个,当检测到油温低于预定油温时,变速条件为 确定存在需要换档操作,使得第一接合压力调节阀提供最大液压以接合第一摩擦元件以开始换档,同时连续提供最大液压直到换档结束,和/或第二接合 压力调节阀提供最小液压,以获得第二摩擦元件的完全分离,以开始换档作为换档操作。