The invention discloses a torque control method and device for an electric four-wheel-drive automobile, and the method comprises the steps: obtaining a required torque and a driving torque of the automobile, and if it is determined that the motor torque of a first motor of the automobile has a torque zero-crossing stage in the process that the total torque of the automobile is changed from the driving torque to the required torque, a torque zero-crossing interval corresponding to the torque zero-crossing stage is determined, in the torque zero-crossing interval, the output torque of the first motor is controlled to change at a first change rate, the output torque of the second motor is controlled to change at a second change rate, and the first change rate is smaller than the second change rate; the total change rate of the first change rate and the second change rate at the same moment is the total torque change rate. The motor torque of the first motor is controlled to complete torque zero passage at a slow change rate, and meanwhile, the loss of the total torque change rate caused by the slow change rate of the torque is compensated by the second motor, so that the meshing impact caused by the torque zero passage is slowed down, and meanwhile, the dynamic response of the vehicle is ensured.

    本申请公开了一种电动四驱汽车的扭矩控制方法及装置,获取需求扭矩和车辆的行使扭矩,若确定车辆第一电机的电机扭矩在车辆总扭矩从行使扭矩变化至需求扭矩的过程中存在扭矩过零阶段,确定该扭矩过零阶段对应的扭矩过零区间,在该扭矩过零区间上,控制第一电机的输出扭矩以第一变化速率变化、第二电机的输出扭矩以第二变化速率变化,第一变化速率小于第二变化速率,同一时刻的第一变化速率和第二速率的总体变化速率为总扭矩变化速率。通过控制所述第一电机的电机扭矩以较慢的变化速率完成扭矩过零,同时因其扭矩变化速率较慢造成的总扭矩变化速率的损失将由所述第二电机进行补偿,从而在减缓因扭矩过零导致的啮合冲击的同时保证了车辆的动力响应。


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    Title :

    Torque control method and device for electric four-wheel-drive automobile


    Additional title:

    一种电动四驱汽车的扭矩控制方法及装置


    Contributors:
    QI FANGTING (author) / LONG YIBING (author) / XUE KANG (author) / ZONG DAWEI (author) / LI XING (author)

    Publication date :

    2024-01-16


    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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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