The invention relates to an energy-saving control method and system for a drive-by-wire four-wheel drive hub motor electric vehicle. The method comprises the steps of obtaining the longitudinal speedand front wheel steering angle of the vehicle in a driving state through detection, combining a two-degree-of-freedom vehicle reference model, and obtaining an ideal side slip angle and an ideal yaw velocity through calculation; according to the mass center slip angle difference value and the yaw velocity difference value, calculating the additional yaw moment needed by stabilization of the wholevehicle ; calculating an ideal torque corresponding to each hub motor according to the additional yawing moment, and calculating an ideal driving power output value according to the ideal torque corresponding to each hub motor; and calculating a corresponding actual driving power output value, and setting a power difference value between the actual driving power output value and the ideal drivingpower output value in a preset range to realize energy-saving control. By means of reasonable torque distribution, on the premise that driving safety is guaranteed, the optimal output power is achieved so as to achieve the energy-saving effect.

    本发明涉及一种线控四轮驱动轮毂电机电动汽车节能控制方法及系统,该方法包括:检测得到汽车在行驶状态下的纵向车速以及前轮转向角,联合二自由度车辆参考模型,计算得到理想质心侧偏角以及理想横摆角速度;根据质心侧偏角差值以及横摆角速度差值,计算得到整车稳定所需的附加横摆力矩;根据附加横摆力矩计算得到各轮毂电机对应的理想转矩,根据各轮毂电机对应的理想转矩,计算得到理想驱动功率输出值;计算得到对应的实际驱动功率输出值,并将实际驱动功率输出值与理想驱动功率输出值的功率差值设置在预设范围内,以实现节能控制。本发明通过合理的力矩分配,在保证行驶安全的前提下,实现最优的输出功率以达到节能效果。


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    Title :

    Energy-saving control method and system for drive-by-wire four-wheel drive hub motor electric vehicle


    Additional title:

    线控四轮驱动轮毂电机电动汽车节能控制方法及系统


    Contributors:

    Publication date :

    2020-10-09


    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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