The invention discloses an electric vehicle braking force distribution method and system. The braking force distribution method comprises the steps of: dividing the braking strength into a first interval, a second interval and a third interval, when the braking strength is in the first interval, calculating distribution coefficients of a front axle motor and a rear axle motor according to a motorefficiency distribution scheme, when the braking strength is in the second interval, calculating the distribution coefficients according to the motor efficiency distribution scheme and a motor efficiency distribution limitation regulation, and when the braking strength is in the third interval, calculating the distribution coefficients according to a braking force distribution curve and the motorefficiency distribution limitation regulation, and calculating the braking force of the front axle motor and the rear axle motor according to the distribution coefficients. According to the braking force distribution method provided by the invention, different distribution strategies are implemented according to different braking strengths, the overall efficiency of the front and rear axles and the braking comfort are comprehensively considered, and the distribution proportion of the front and rear axle motors is determined by combining ECE regulation, so that the stability of the vehicle is fully guaranteed during regenerative braking force distribution.

    本发明公开了一种电动汽车制动力分配方法及系统。制动力分配方法包括将制动强度划分为第一区间、第二区间和第三区间,当制动强度处于第一区间时,根据电机效率分配方案计算前轴电机和后轴电机的分配系数,当制动强度处于第二区间时,根据电机效率分配方案以及电机效率分配限制法规计算分配系数,当制动强度处于第三区间时,根据制动力分配曲线以及电机效率分配限制法规计算分配系数,根据分配系数计算前轴电机和后轴电机的制动力。本发明提出的制动力分配方法根据制动强度的不同,实施不同的分配策略,综合考虑前后轴整体效率以及制动舒适性,并结合ECE法规来确定前后轴电机的分配比例,使得对再生制动力分配时充分保证了车辆的稳定性。


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    Title :

    Electric vehicle braking force distribution method and system


    Additional title:

    一种电动汽车制动力分配方法及系统


    Contributors:
    SUN QICHUN (author) / SHANG YUNZHI (author) / CUI JINLONG (author) / WU AIBIN (author) / LIU YUANZHI (author) / ZHAO YONGQIANG (author) / LIU JIANKANG (author) / ZHAO YANG (author) / ZHOU ZEHUI (author)

    Publication date :

    2020-06-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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



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