The embodiment of the invention provides a slope estimation method and system and a vehicle, and the method comprises the steps: firstly estimating a first slope estimation value based on a vehicle dynamics formula, obtaining a second slope estimation value based on sensor measurement, and then introducing a confidence factor based on the first slope estimation value and the second slope estimation value, the credibility of a slope estimation value is increased through a confidence factor, namely, the accuracy of the slope estimation value is increased, then a comprehensive slope value of the current working condition of the vehicle is obtained based on the accurate slope estimation value, passivation processing is conducted on the comprehensive slope value, frequent jumping of a control state caused by fluctuation of the slope value is prevented, and finally, the control state of the vehicle is controlled. And the torque is accurately corrected according to the passivated comprehensive slope value, so that the purpose of accurately controlling the vehicle is achieved, the energy consumption is reduced, and the driving feeling of a driver is improved.

    本发明实施例提供一种坡度估算方法、系统及车辆,所述方法包括:首先基于车辆动力学公式估算出第一坡度估算值以及基于传感器测量得到第二坡度估算值,然后基于所述第一坡度估算值和所述第二坡度估算值,引入置信因子,通过置信因子增加坡度估算值的可信度,即增加坡度估算值的精确度,然后基于精确坡度估算值得到所述车辆当前所处工况的综合坡度值,对所述综合坡度值进行钝化处理,以防坡度值的波动引起控制状态的频繁跳变,最后,根据钝化处理后的综合坡度值对扭矩进行精确修正,达到精确控制车辆的目的,从而降低能耗,提高驾驶员的驾驶感受。


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    Title :

    Gradient estimation method and system and vehicle


    Additional title:

    一种坡度估算方法、系统及车辆


    Contributors:
    LI YONGGANG (author) / TANG ZIWEI (author) / LIU WENJIAN (author)

    Publication date :

    2024-01-30


    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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