Closed-loop torque phase control for shifting automatic transmission gear ratios based on friction element load estimation
    22.
    发明授权
    Closed-loop torque phase control for shifting automatic transmission gear ratios based on friction element load estimation 有权
    基于摩擦元件负载估计的用于换档自动变速器齿轮比的闭环扭矩相位控制

    公开(公告)号:US08510003B2

    公开(公告)日:2013-08-13

    申请号:US12861387

    申请日:2010-08-23

    IPC分类号: F16H59/14

    摘要: A closed loop shift control apparatus and method based on estimated torque in friction elements controls a torque transfer phase when shifting from a low gear configuration to a high gear configuration for an automatic transmission system. When pressure actuated friction elements are selectively engaged and released to establish torque flow paths in the transmission, estimates of torsional load exerted on the off-going friction element are used to predict the optimal off-going friction element release timing for achieving a consistent shift feel. The estimated torque is preferably calculated by using estimated torque signals generated as a function of speed measurements represented either the engine speed and turbine output speed or transmission output speed and wheel speed under dynamically changing conditions.

    摘要翻译: 基于摩擦元件中的估计转矩的闭环换档控制装置和方法控制从低档配置转换到用于自动变速器系统的高齿轮配置的转矩传递阶段。 当压力驱动的摩擦元件选择性地接合和释放以在变速器中建立扭矩流动路径时,使用施加在脱离摩擦元件上的扭转载荷的估计来预测最佳的脱离摩擦元件释放时间以实现一致的换档感觉 。 估计扭矩优选地通过使用作为速度测量的函数产生的估计转矩信号来计算,其表示动态变化的条件下的发动机转速和涡轮机输出速度或变速器输出速度和车轮速度。

    Methods and systems for assisted direct start control
    25.
    发明授权
    Methods and systems for assisted direct start control 有权
    辅助直接起动控制的方法和系统

    公开(公告)号:US08216112B2

    公开(公告)日:2012-07-10

    申请号:US12541023

    申请日:2009-08-13

    IPC分类号: F16H61/26 F16H31/00

    摘要: Systems and methods are provided for controlling a vehicle system including an engine that is selectively shut-down during engine idle-stop conditions, the system further including a hydraulic circuit comprising a hydraulically actuated transmission component, an accumulator, and an auxiliary transmission fluid pump. One example method comprises, during a first idle-stop engine shut-down condition, where the accumulator pressure is above a threshold, delivering pressurized transmission fluid to the hydraulic circuit from the accumulator, while disabling the auxiliary pump. The method further comprises, during a second idle-stop engine shut-down condition, where the accumulator pressure is below the threshold, operating the auxiliary pump and delivering at least some pressurized transmission fluid to the hydraulic circuit from the operating pump without travelling through the accumulator.

    摘要翻译: 提供的系统和方法用于控制车辆系统,其包括在发动机怠速停止状态期间选择性地关闭的发动机,该系统还包括液压回路,该液压回路包括液压致动的变速部件,蓄能器和辅助变速器油泵。 一个示例性方法包括在第一怠速停止发动机关闭状态期间,蓄能器压力高于阈值,同时禁用辅助泵,将加压的变速器流体从蓄能器输送到液压回路。 该方法还包括在第二怠速停止发动机关闭状态期间,蓄能器压力低于阈值,操作辅助泵并且从操作泵将至少一些加压变速器流体输送到液压回路而不经过 累加器。

    Closed-Loop Torque Phase Control for Shifting Automatic Transmission Gear Ratios Based on Friction Element Load Estimation
    28.
    发明申请
    Closed-Loop Torque Phase Control for Shifting Automatic Transmission Gear Ratios Based on Friction Element Load Estimation 有权
    基于摩擦元件负载估计的变速自动变速器齿轮比的闭环扭矩相位控制

    公开(公告)号:US20100318269A1

    公开(公告)日:2010-12-16

    申请号:US12861387

    申请日:2010-08-23

    IPC分类号: F16H61/684

    摘要: A closed loop shift control apparatus and method based on estimated torque in friction elements controls a torque transfer phase when shifting from a low gear configuration to a high gear configuration for an automatic transmission system. When pressure actuated friction elements are selectively engaged and released to establish torque flow paths in the transmission, estimates of torsional load exerted on the off-going friction element are used to predict the optimal off-going friction element release timing for achieving a consistent shift feel. The estimated torque is preferably calculated by using estimated torque signals generated as a function of speed measurements represented either the engine speed and turbine output speed or transmission output speed and wheel speed under dynamically changing conditions.

    摘要翻译: 基于摩擦元件中的估计转矩的闭环换档控制装置和方法控制从低档配置转换到用于自动变速器系统的高齿轮配置的转矩传递阶段。 当压力驱动的摩擦元件选择性地接合和释放以在变速器中建立扭矩流动路径时,使用施加在脱离摩擦元件上的扭转载荷的估计来预测最佳的脱离摩擦元件释放时间以实现一致的换档感觉 。 估计扭矩优选地通过使用作为速度测量的函数产生的估计转矩信号来计算,其表示动态变化的条件下的发动机转速和涡轮机输出速度或变速器输出速度和车轮速度。