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    • 1. 发明授权
    • Hydraulic control system for automatic transmission
    • 自动变速箱液压控制系统
    • US06259983B1
    • 2001-07-10
    • US09119237
    • 1998-07-21
    • Hiroshi TsutsuiMasaaki NishidaYoshihisa YamamotoMasao SaitoTakayuki Kubo
    • Hiroshi TsutsuiMasaaki NishidaYoshihisa YamamotoMasao SaitoTakayuki Kubo
    • F16H900
    • F16H61/0437F16H61/08F16H2059/425F16H2059/6807F16H2061/0087Y10T477/623
    • A learning controller makes learning correction based on a time tST between start of a shift control routine and detection of start of a change in rotational speed of the transmission input shaft and further based on the amount of rotational speed change &ohgr;S′ at the detected start of the rotational speed change. When the time tST is longer than a basic time and when the rotational change amount &ohgr;S′ is too large, it is determined that a servo piston has not been sufficiently advanced and the shift control is corrected so that the time tST is lengthened. When the time tST to the detected start of the rotational speed change &ohgr;S′ is too small, it is determined that, while the piston has been advanced properly, the target engagement pressure PTA in torque phase control is too low because of a miscalculation, and the shift control is corrected so that the target engagement pressure is raised.
    • 学习控制器基于变速控制程序开始之间的时间tST和变速器输入轴的转速开始的检测开始之间的时间tST进一步进行学习校正,并且还基于检测到的开始时的转速变化量ω 转速变化。 当时间tST长于基本时间,并且当旋转变化量ωs'太大时,确定伺服活塞未被充分提前,并且校正换档控制,使得时间tST延长。 当检测到的转速ω'S'的开始的时间tST太小时,确定在活塞已经正确前进的情况下,由于计算错误,转矩相位控制中的目标接合压力PTA太低,并且 校正换档控制,使得目标接合压力升高。