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1. 发明授权

US06415213B1 Model-based control of an automatic transmission power-on downshift 有权
标题翻译：基于型号的自动变速箱控制开机降档
公开(公告)号：US06415213B1
公开(公告)日：2002-07-02
申请号：US09574929
申请日：2000-05-19
申请人： Gregory A Hubbard , Jeffrey Kurt Runde , Anthony Hubert Heap
发明人： Gregory A Hubbard , Jeffrey Kurt Runde , Anthony Hubert Heap
IPC分类号： G06F700
CPC分类号： F16H61/0437 , F16H59/20 , F16H61/0213
摘要： An improved control for an automatic transmission power-on downshift, wherein a dynamic model of the transmission is used to schedule the on-coming and off-going clutch pressures based on the transmission input torque and a desired trajectory of the input shaft during the shift. The shift is initiated with the off-going clutch by using the dynamic model achieve consistent initiation of clutch slippage, and to conform the input speed to the desired trajectory. When the input speed nears a synchronization speed for the target speed ratio, the dynamic model is used to engage the on-coming clutch at a rate based on the input torque while maintaining the input speed in synchronism with the target speed ratio. As a result, the control responds appropriately to dynamic changes in input torque, the input speed more accurately tracks the desired trajectory, and the shifts are completed at or near synchronism. Additionally, scheduling the clutch pressures based on the dynamic model achieves more consistent shift feel and improved adaptability to different powertrain and vehicle-type configurations while reducing the number of calibrated parameters requiring adaptive correction.
摘要翻译：用于自动变速器开机降档的改进的控制，其中使用变速器的动态模型来基于变速器输入转矩和变速器期间的输入轴的期望轨迹来安排接近和离开的离合器压力。通过使用动态模型实现离合器打滑的一致启动并使输入速度符合期望的轨迹，该离合器由离合离合器开始。当输入速度接近于目标速度比的同步速度时，动态模型用于以与目标速度比同步地保持输入速度的方式基于输入转矩的速率接合来回离合器。结果，该控制适当地响应于输入转矩的动态变化，输入速度更准确地跟踪期望的轨迹，并且在同步或接近同步完成位移。另外，基于动态模型安排离合器压力可实现更一致的换档感觉，并提高对不同动力系和车型配置的适应性，同时减少需要自适应校正的校准参数数量。

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