The invention discloses an engine shutdown control method and device for a power split hybrid power system, and the method comprises the steps: determining a shutdown drag curve enabling the longitudinal impact degree of a vehicle to be minimum in the shutdown process of an engine according to a target crankshaft angle, the longitudinal impact degree of the vehicle in the shutdown process of the engine and the rotating speed of the engine; according to the difference value between the rotating speed of the engine in the kth second in the shutdown process and the target rotating speed of the engine in the kth second on the shutdown dragging curve, the output torque of the generator is determined, and the rotating speed of the engine in the kth second is controlled to reach the target rotating speed of the engine in the kth second on the shutdown dragging curve according to the output torque of the generator, the engine crank angle is adjusted to reach the target crank angle according to the generator output torque determined according to the shutdown drag curve, the adverse effect on vehicle driving smoothness caused by crank angle adjustment in the engine shutdown process is effectively reduced, the impact feeling in the engine shutdown process is reduced, and the vehicle driving smoothness is improved.
本申请公开了一种功率分流混合动力系统的发动机停机控制方法及装置,根据目标曲轴转角、发动机停机过程中的车辆纵向冲击度和发动机转速,确定使发动机停机过程中的车辆纵向冲击度最小的停机拖拽曲线,根据停机过程中发动机第k秒的转速与停机拖拽曲线上第k秒的目标转速的差值,确定发电机输出转矩,根据发电机输出转矩控制发动机第k秒的转速达到停机拖拽曲线上第k秒的目标转速,根据停机拖拽曲线确定的发电机输出转矩调节发动机曲轴转角达到目标曲轴转角,有效减少了发动机停机过程中调节曲轴转角对车辆驾驶平顺性带来的不利影响,降低了发动机停机过程的冲击感,提高了车辆驾驶平顺性。
Engine shutdown control method and device of power split hybrid power system
一种功率分流混合动力系统的发动机停机控制方法及装置
2025-01-14
Patent
Electronic Resource
Chinese
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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