The invention discloses a multi-mode engine braking control method and device for an automatic-transmission heavy truck and a medium. The method comprises the steps that whether an engine enters a gearbox gear shifting mode in multi-mode engine braking or not is determined according to a gear signal in whole-vehicle information of the automatic-transmission heavy truck, and whether an engine braking entering condition is met or not is determined when gear shifting is not conducted, if yes, receiving an engine braking instruction to control the engine to enter a corresponding engine braking mode; the target braking power percentage of engine braking in the engine braking mode of the driver and the target vehicle speed in the automatic constant-speed engine braking mode are determined; determining a braking gear of which the braking power range is matched with the target braking power percentage or the braking torque of the target vehicle speed, and adjusting the braking power; and when the rising speed of the vehicle speed or the rotating speed of the engine exceeds a threshold value within a preset time interval, the engine has an overspeed risk, an emergency braking mechanism in the emergency full-braking mode is started, and multi-mode engine braking control over the automatic transmission heavy truck is achieved.

    本申请公开了一种自动挡重卡多模式发动机制动控制方法、设备及介质,方法包括:根据自动挡重卡整车信息中的档位信号确定发动机是否进入多模式发动机制动中的变速箱换挡模式,在非换挡时确定是否符合发动机制动进入条件,若是则接收发动机制动指令以控制发动机进入相应发动机制动模式;确定驾驶员发动机制动模式下发动机制动的目标制动功率百分比及自动恒速发动机制动模式下的目标车速;确定制动功率范围与目标制动功率百分比或目标车速的制动扭矩匹配的制动档级并调整制动功率;在预设时间间隔内车速或发动机转速的上升速率超过阈值时发动机存在超速风险,开启紧急全制动模式中的紧急制动机制,实现对自动挡重卡的多模式发动机制动控制。


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    Title :

    Automatic transmission heavy truck multi-mode engine braking control method and device and medium


    Additional title:

    一种自动挡重卡多模式发动机制动控制方法、设备及介质


    Contributors:
    FAN HUIMIN (author) / FENG YANMING (author)

    Publication date :

    2024-02-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / 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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