An electric powertrain (120) includes a power source (122), an electric motor (124), and a multi-speed transmission (130). The powertrain (120) has an electronic controller (140). The controller (140) determines a respective rim traction torque limit (142, 144, 146) for an operating gear of the multi-speed transmission (130), and determines whether the rim traction torque demand exceeds the rim traction torque limit. Upon determining that the rim traction torque demand exceeds the rim traction torque limit, the controller (140) performs (i) shifting the multi-speed transmission (130) to a gear in which the respective rim traction torque limit is at or above the rim traction torque demand, or (ii) reduce the electric motor torque command to a level at which the rim traction torque is below a corresponding rim traction torque limit for an operating gear of the multi-speed transmission (130).
一种电动动力系(120)包括电源(122)、电动马达(124)和多速变速器(130)。动力系(120)具有电子控制器(140)。控制器(140)确定多速变速器(130)的操作挡位的相应轮缘牵引力扭矩限制(142、144、146),并且确定轮缘牵引力扭矩需求是否超过轮缘牵引力扭矩限制。在确定轮缘牵引力扭矩需求超过轮缘牵引力扭矩限制时,控制器(140)进行(i)将多速变速器(130)切换到相应轮缘牵引力扭矩限制处于或高于轮缘牵引力扭矩需求的挡位,或(ii)将电动马达扭矩命令降低到轮缘牵引力扭矩低于多速变速器(130)的操作挡位的相应轮缘牵引力扭矩限制的水平。
Electric powertrain with rim traction torque limit protection
具有轮缘牵引力扭矩限制保护的电动动力系
2025-05-13
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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