The invention discloses an engine exhaust temperature control method and device, a hybrid power system and a vehicle. The control method comprises the steps that the exhaust temperature of an engine is obtained; when the exhaust temperature of the engine is larger than the first exhaust temperature protection threshold value, the operation mode of the hybrid power system is obtained, and the operation mode comprises a series connection mode or a parallel connection mode; according to the operation mode of the hybrid power system, determining a cooling strategy including a transfer engine working point; and a cooling strategy is controlled to be executed until the exhaust temperature of the engine is smaller than the second exhaust temperature protection threshold value. According to the series connection mode or the parallel connection mode, different cooling strategies including engine working point transfer are correspondingly adopted, the exhaust temperature of the engine is effectively reduced, meanwhile, oil injection enrichment in the exhaust temperature reducing process is avoided, oil consumption increased due to oil injection enrichment is reduced, oil consumption of the hybrid power system is reduced, and the service life of the hybrid power system is prolonged. And the effects of energy conservation and emission reduction are achieved.

    本发明公开了一种发动机排气温度的控制方法及装置、混合动力系统、车辆。控制方法包括:获取发动机的排气温度;在发动机的排气温度大于第一排温保护阈值时,获取混合动力系统的运行模式,运行模式包含串联模式或并联模式;根据混合动力系统的运行模式,确定包含转移发动机工作点的降温策略;控制执行降温策略,直至发动机的排气温度小于第二排温保护阈值。本申请根据串联模式或并联模式,对应采用均包含转移发动机工作点的不同降温策略,有效降低发动机的排气温度的同时,避免了降低排气温度过程中的喷油加浓,也就降低了因喷油加浓增加的油耗,降低混合动力系统的油耗,有节能减排的作用。


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    Titel :

    Engine exhaust temperature control method and device, hybrid power system and vehicle


    Weitere Titelangaben:

    发动机排气温度的控制方法及装置、混合动力系统、车辆


    Beteiligte:
    ZHU FUTANG (Autor:in) / ZHAO CHEN (Autor:in) / PENG BO (Autor:in) / WANG XINKUI (Autor:in)

    Erscheinungsdatum :

    23.08.2024


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    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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