The present disclosure provides torque control during transitioning to four-wheel drive in an autonomous driving mode. A vehicle includes a primary axle, a secondary axle, and a powertrain. The powertrain has an engine coupled to the primary axle and selectively coupled to the secondary axle. The vehicle also includes a clutch associated with the secondary axle. A controller is programmed to, in response to (i) a request to transition from two-wheel drive to four-wheel drive and (ii) a current engine torque command exceeding a torque limit associated with the clutch, override the current engine torque command to reduce torque of the engine below the torque limit, and command engagement of the clutch in response to the torque of the engine being less than the torque limit.

    本公开提供了“在自动驾驶模式下转换到四轮驱动期间的扭矩控制”。一种车辆包括主车桥、副车桥和动力传动系统。所述动力传动系统具有发动机,所述发动机联接到所述主车桥并且选择性地联接到所述副车桥。所述车辆还包括与所述副车桥相关联的离合器。控制器被编程为响应于(i)从两轮驱动转换到四轮驱动的请求以及(ii)当前发动机扭矩命令超过与所述离合器相关联的扭矩极限,超驰所述当前发动机扭矩命令以将所述发动机的扭矩减小到所述扭矩极限之下,并且响应于所述发动机的所述扭矩小于所述扭矩极限,命令所述离合器的接合。


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    Title :

    Torque control during transition to four-wheel drive in automatic driving mode


    Additional title:

    在自动驾驶模式下转换到四轮驱动期间的扭矩控制


    Contributors:

    Publication date :

    2023-12-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion



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