The invention discloses a torque vectoring and gear shifting control method and system for a four-wheel-drive vehicle. The torque vectoring and gear shifting control method comprises the steps that the torque requirement of the current vehicle is determined; the front wheel turning angle and the yaw velocity of the current vehicle are collected; judging whether the current vehicle is in a turning state or not according to the collected front wheel turning angle and yaw velocity; when it is judged that the vehicle is not in the turning state, the optimal distribution torque of a front axle driver and the optimal distribution torque of a rear axle driver are adjusted according to the overall vehicle comprehensive efficiency optimal principle, and meanwhile the optimal gear of the rear axle driver is determined; when it is judged that the vehicle is in the turning state, the optimal distribution torque of a front axle driver and a rear axle driver is adjusted according to the whole vehicle posture stability optimal principle; the problems that torque control of an existing dual-power four-wheel-drive vehicle cannot be in fit with the actual driving state, energy consumption is high and driving stability is poor are solved, the accuracy of a torque control strategy is improved, and the power performance of the vehicle is brought into full play.

    本发明公开了一种四驱车辆扭矩矢量与换挡控制方法及系统,包括步骤:确定当前车辆的扭矩需求;采集当前车辆的前轮转角及横摆角速度;根据所采集的前轮转角及横摆角速度,判断当前车辆是否处于转弯状态;当判断车辆未处于转弯状态时,根据整车综合效率最佳原则,调整前桥驱动器和后桥驱动器的最佳分配扭矩,同时确定后桥驱动器的最佳挡位;当判断车辆处于转弯状态时,根据整车姿态稳定最佳原则,调整前桥驱动器和后桥驱动器的最佳分配扭矩;其解决了现有双动力四驱车辆的扭矩控制无法贴合实际行车状态,能耗高且行车稳定性差的问题,提高了扭矩控制策略的精确性,充分发挥车辆的动力性能。


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    Title :

    Torque vectoring and gear shifting control method and system for four-wheel-drive vehicle


    Additional title:

    一种四驱车辆扭矩矢量与换挡控制方法及系统


    Contributors:
    JIANG YANFEI (author) / ZHU YOUQUAN (author) / WANG HUAN (author) / ZHANG TAO (author)

    Publication date :

    2023-04-11


    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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