The invention relates to a maximum vehicle speed control method of an electric vehicle based on road surface recognition, and belongs to the technical field of electric vehicle driving control. The method comprises the following steps: step 1, vehicle speed and wheel speed calculation: an ABS vehicle speed signal and a wheel speed signal which are received from a CAN network are respectively filtered, the filtered vehicle speed is v1, the filtered driving wheel speed is v2, and the filtered driven wheel speed is v3; step 2, calculating slip rate; step 3, calculating a road adhesion coefficient; step 4, calculating the maximum vehicle speed limit torque: identifying a corresponding road surface according to the slip rate and the road surface adhesion coefficient peak value, and selecting the preset maximum target vehicle speed in the matrix as the real-time maximum vehicle speed allowed by the current vehicle; and step 5, controlling the maximum vehicle speed. According to the method, different driving road surfaces can be identified, the maximum speed of the vehicle can be corrected in real time according to the different driving road surfaces, so that the vehicle can be driven on the different road surfaces within the maximum speed range of safe driving, and the driving safety of the electric vehicle is improved.

    本发明涉及一种电动汽车基于路面识别的最高车速控制方法。属于电动汽车行车控制技术领域。方法包括以下步骤:步骤1车速与轮速计算:对接收CAN网络的ABS车速信号和轮速信号,分别进行滤波,滤波后的车速为v1,滤波后的驱动轮轮速为v2,滤波后的从动轮轮速为v3;步骤2滑移率计算;步骤3路面附着系数计算;步骤4最高车速限制扭矩计算:根据滑移率和路面附着系数峰值识别对应的路面,选取矩阵中预设的最高目标车速为当前车辆允许的实时最高车速;步骤5最高车速控制。本发明可以识别不同的行驶路面,根据不同的行驶路面实时修正车辆的最高车速,使汽车在不同路面上能以安全行驶的最高车速范围内进行行驶,提升电动汽车的行驶安全性。


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    Titel :

    Maximum vehicle speed control method of electric vehicle based on road surface recognition


    Weitere Titelangaben:

    一种电动汽车基于路面识别的最高车速控制方法


    Beteiligte:
    CAI XIAOLONG (Autor:in) / QU FANGYU (Autor:in) / LIU WEIDONG (Autor:in)

    Erscheinungsdatum :

    2021-11-02


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    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 / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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