The invention discloses an automobile gear control method and system and a new energy automobile, and belongs to the technical field of gear control. The automobile gear control method comprises the steps: when an N gear state is switched to a D gear state, acquiring and determining whether the absolute value of the current rotating speed of a motor is smaller than or equal to a first preset rotating speed or not; acquiring and judging whether the current rotating speed of the motor is greater than or equal to zero; acquiring and judging whether the current torque value of the motor is smaller than or equal to the first preset torque; judging whether a brake pedal is stepped down or not; only when the current rotating speed of the motor is larger than or equal to zero, the absolute value of the current rotating speed is smaller than or equal to the first preset rotating speed, the current torque value is smaller than or equal to the first preset torque, and the brake pedal is stepped down, switching the gear of the vehicle control unit to the D gear. According to the invention, when the N gear is switched to the D gear or the R gear, the current rotating speed and the current torque value of the motor and the state of the brake pedal are considered, the influence of sudden change of the torque direction of the motor is avoided, and the driving safety and smoothness of the new energy automobile are improved.

    本发明公开了一种汽车挡位控制方法、系统及新能源汽车,属于挡位控制技术领域,汽车挡位控制方法包括在N挡位状态切换至D挡位时,获取并判断电机的当前转速的绝对值是否小于等于第一预设转速;获取并判断电机的当前转速是否大于等于零;获取并判断电机的当前转矩值是否小于等于第一预设转矩;判断制动踏板是否被踩下;仅当电机的当前转速大于等于零,且当前转速的绝对值小于等于第一预设转速,且当前转矩值小于等于第一预设转矩,且制动踏板被踩下时,整车控制器将挡位切换至D挡位。通过在由N挡位切换至D挡位或R挡位时,考虑电机当前转速、当前转矩值及制动踏板的状态,避免电机转矩方向突变的影响,提高新能源汽车行驶的安全性和平顺性。


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    Title :

    Automobile gear control method and system and new energy automobile


    Additional title:

    一种汽车挡位控制方法、系统及新能源汽车


    Contributors:
    PANG XUEWEN (author) / ZHAO ZIJIAN (author) / YANG SHUAI (author) / YU HUI (author) / CHEN LIJUN (author) / MU JUNDA (author)

    Publication date :

    2021-05-11


    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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