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1. 发明授权

US06663532B1 Dual strategy control for a toroidal drive type continuously variable transmission 有权
标题翻译：环形驱动型无级变速器的双重策略控制
公开(公告)号：US06663532B1
公开(公告)日：2003-12-16
申请号：US09666745
申请日：2000-09-20
申请人： Gordon M. McIndoe , Charles B. Lohr , John M. Loeffler
发明人： Gordon M. McIndoe , Charles B. Lohr , John M. Loeffler
IPC分类号： B06K4112
CPC分类号： F16H15/38 , F16H37/086 , F16H61/664 , F16H61/6649 , F16H2037/0886 , Y10T477/623
摘要： An apparatus and method for operating a continuously variable transmission (CVT), such as a toroidal drive type transmission, is disclosed. The CVT is selectively operated in either a torque control strategy and a ratio control strategy, depending upon the operating conditions of the vehicle. Thus, the CVT is operated in such a manner as to benefit from the advantageous aspects of both the torque and ratio control strategies, while avoiding the disadvantageous aspects of both strategies. The transition from the torque control strategy to the ratio control strategy (and vice versa) can be accomplished by simultaneously calculating the control pressures that would result from operation in both the torque and ratio control strategies, and further assigning a weighted value to each of such calculated control pressures based upon the current operating conditions. The summation of such weighted values provides a composite control signal that facilitates a smooth transition between the two control strategies. The transition from the torque control strategy to the ratio control strategy preferably occurs before a mode shift is effected. Negative feedback is provided in response to ratio changes effected by the control signals to increase stability and to compensate for sensitivity differences at different ratio angles, loading, speeds, and temperatures.
摘要翻译：公开了一种用于操作诸如环形驱动型变速器的无级变速器（CVT）的装置和方法。根据车辆的操作条件，CVT可选择性地在转矩控制策略和比率控制策略中操作。因此，CVT以这样的方式运行，以便从扭矩和比率控制策略的有利方面受益，同时避免两种策略的不利方面。从扭矩控制策略向比例控制策略的转变（反之亦然）可以通过同时计算由扭矩和比率控制策略中的操作产生的控制压力，并且进一步分配加权值基于当前操作条件的计算控制压力。这种加权值的总和提供了一种有助于两个控制策略之间平滑过渡的复合控制信号。从转矩控制策略到比率控制策略的转换优选地在模式转换之前发生。响应于由控制信号影响的比率变化提供负反馈以增加稳定性并补偿不同比率角，负载，速度和温度下的灵敏度差异。

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