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Invention Publication
CN101608688A 自动变速器的变速控制装置 有权 转让

自动变速器的变速控制装置
Abstract:
一种自动变速器的变速控制装置，在替换变速中产生的惯性阶段时，不需要过多的开发工序、适配工序，能够有效地降低在惯性阶段结束区域发生的振动。自动变速器的变速控制装置具备：变速控制机构，其使第一摩擦联接元件释放并使第二摩擦联接元件联接而向其它变速级变速；惯性阶段控制机构，其在替换变速中产生的惯性阶段时、在向其它变速级变速中检测到的齿数比达到表示惯性阶段快要结束前区域的设定齿数比时，使向第二摩擦联接元件供给的指令液压(P)暂时下降，其中，惯性阶段控制机构具有结束压力控制部(步骤S62～步骤S68)，其基于在惯性阶段快要结束前区域、每隔规定时间检测的齿数比(GR)，每隔规定时间设定指令液压(P)的下降量，并且使指令液压(P)逐渐下降。
Abstract(English):

In gear shift control apparatus and method for an automatic transmission, a first frictional engagement element is, in turn, released, a second frictional engagement element is, in turn, engaged to perform the gear shift to another gear stage, a command hydraulic pressure to the second frictional engagement element is temporarily reduced when a parameter indicating a degree of progress of the gear shift detected during the gear shift to the other gear stage has reached to a predetermined value representing an inertia phase finish immediate prior region at a time of an inertia phase developed during a replacement gear shift, an reduction quantity of the command hydraulic pressure is set whenever a predetermined time has elapsed on a basis of the parameter detected whenever the predetermined time has elapsed in the inertia phase finish immediate prior region to progressively reduce the command hydraulic pressure.

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