The present disclosure provides a torque ratio limit for an automatic transmission. A vehicle includes a multi-speed transmission having an input shaft and an output shaft; an actuator; and a torque converter having an impeller selectively coupled to the actuator and a turbine coupled to the input shaft. Vehicle controller programmed to command the actuator based on driver-demanded wheel torque and minimum torque ratio in response to an estimated torque ratio between the impeller and an output shaft of the transmission being less than the minimum torque ratio between the impeller and the output shaft of the transmission during a shift of the transmission A torque is commanded to the actuator based on the driver-demanded wheel torque and the estimated torque ratio in response to the estimated torque ratio exceeding the minimum torque ratio during the shift of the transmission, and another torque is commanded to the actuator based on the driver-demanded wheel torque and the estimated torque ratio in response to the estimated torque ratio exceeding the minimum torque ratio during the shift of the transmission.
本公开提供“自动变速器的扭矩比界限”。一种车辆包括:多速变速器,所述多速变速器具有输入轴和输出轴;致动器;以及变矩器,所述变矩器具有选择性地联接到所述致动器的泵轮和联接到所述输入轴的涡轮。车辆控制器被编程为响应于在所述变速器的换挡期间所述泵轮与所述变速器的输出轴之间的所估计扭矩比小于所述泵轮与所述变速器的输出轴之间的最小扭矩比而基于驾驶员需求的车轮扭矩和所述最小扭矩比来向所述致动器命令扭矩,并且响应于在所述变速器的所述换挡期间所述所估计扭矩比超过所述最小扭矩比而基于所述驾驶员需求的车轮扭矩和所述所估计扭矩比向所述致动器命令另一个扭矩。
Torque ratio limit for automatic transmission
自动变速器的扭矩比界限
2022-03-01
Patent
Elektronische Ressource
Chinesisch
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