The invention discloses a hybrid electric vehicle engine working point selection and torque distribution method. The method comprises the steps that a whole vehicle domain controller obtains an engine fuel conversion rate contour map; obtaining an optimal torque point selection curve, a maximum torque point selection curve and a minimum torque point selection curve on the contour map of the fuel conversion rate of the engine; comparing the actual residual electric quantity of the automobile with the target residual electric quantity to obtain an automobile charging/discharging demand working condition; acquiring the required torque of the engine, and comparing the required torque with the optimal torque point selection curve, the maximum torque point selection curve and the minimum torque point selection curve to obtain a torque stage; the whole vehicle domain controller combines the vehicle charging/discharging demand working condition and the torque stage to obtain the working condition of an engine working point; and when the working point of the engine is switched from one working condition to another working condition, the engine meets the switching condition and is switched after being prolonged for a certain time. The working state of the engine is switched from the transient state to the steady state, and the economical efficiency and the NVH characteristic of the automobile are improved.

    本发明公开一种混合动力汽车发动机工作点选择与扭矩分配的方法,包括:整车域控制器获取发动机燃油转化率等高线图;在发动机燃油转化率等高线图上得到最佳扭矩选点曲线、最大扭矩选点曲线和最小扭矩选点曲线;比较汽车实际剩余电量和目标剩余电量的大小,得到汽车充/放电需求工况;获取发动机的需求扭矩,并将其分别与最佳扭矩选点曲线、最大扭矩选点曲线和最小扭矩选点曲线比较大小,得到扭矩阶段;整车域控制器组合汽车充/放电需求工况和扭矩阶段,得到发动机工作点的工况;当发动机工作点由一个工况切换至另一个工况时,发动机满足切换条件并延长一定时间后切换。本发明将发动机工作状态从瞬态切换至稳态,提高了汽车经济性和NVH特性。


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    Title :

    Hybrid electric vehicle engine working point selection and torque distribution method


    Additional title:

    一种混合动力汽车发动机工作点选择与扭矩分配的方法


    Contributors:
    XING BO (author) / LI JIA (author) / WANG YANPENG (author) / YU SONGBIN (author) / LI PENGSHUAI (author) / PANG JUNKANG (author) / LI QIANG (author)

    Publication date :

    2024-12-13


    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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