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2. 发明申请

US20140336890A1 System And Method For Optimizing Downshifting Of A Transmission During Vehicle Deceleration 有权
标题翻译：减速期间优化传动减速的系统和方法
公开(公告)号：US20140336890A1
公开(公告)日：2014-11-13
申请号：US13920168
申请日：2013-06-18
申请人： Allison Transmission Inc.
发明人： John Kresse , John A. Byerly , Todd Dygert , Mark A. Rains
IPC分类号： F16H61/68
CPC分类号： F16H61/68 , F16H59/54 , F16H61/0213 , F16H61/21 , F16H2059/663 , F16H2061/0237
摘要： The present disclosure provides a method of selecting a gear ratio of a transmission. The method includes measuring a current road grade with a sensing device and communicating the current road grade measurement to the controller. The controller receives a signal corresponding to a service brake input and determines a desired maximum acceleration limit of the vehicle. The method also includes calculating a predicted vehicle acceleration, measuring a current vehicle acceleration, and calculating an error value as a function of the predicted vehicle acceleration and measured vehicle acceleration. The method also computes an estimated required tractive braking effort and estimated tractive braking effort for at least one of N automatically selectable gear ratios of the transmission and selects one gear ratio of the N automatically selectable gear ratios for the operation of the transmission based on a comparison of the estimated required tractive braking effort and estimated tractive braking effort.
摘要翻译：本公开提供了选择变速器的变速比的方法。该方法包括使用感测装置测量当前道路等级，并将当前道路等级测量值传送给控制器。控制器接收与行车制动器输入相对应的信号，并确定车辆所需的最大加速极限。该方法还包括计算预测的车辆加速度，测量当前车辆加速度，以及计算作为预测的车辆加速度和测量的车辆加速度的函数的误差值。该方法还计算传动的N个可自动选择的传动比中的至少一个中估计的所需牵引制动力和估计的牵引制动力，并根据比较选择N个可自动选择的变速比的传动比用于变速器的操作估计所需的牵引制动力和估计的牵引制动力。

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