The invention relates to the technical field of hybrid vehicle power systems, and discloses a hybrid vehicle power system series-parallel connection mode switching control method and system, and the method comprises the following steps: calculating the rotating speed n1 of one end, connected with an output shaft of a driving motor, of a clutch; the rotating speed n2 of an output shaft of an engine connected with the other end of the clutch is adjusted, and if the rotating speed difference between the rotating speed n1 and the rotating speed n2 is smaller than or equal to the first threshold value, and the duration time reaches the second threshold value; the HTCU calculates the required oil pressure P2 of the clutch according to the required torque and the preset offset torque, and adjusts the rotating speed of the CAP motor to enable the oil pressure of the clutch to reach the required oil pressure P2, so that the adjustment of the output torque of the driving motor is realized; and the power system is switched from the series connection mode to the parallel connection mode. The power system is switched from a series connection mode to a parallel connection mode, inertia impact generated when the clutch is combined can be effectively reduced, and the jamming phenomenon is reduced. The control is easy to realize and the control precision is higher.
本发明涉及混动汽车动力系统技术领域,公开了一种混动汽车动力系统串并联模式切换的控制方法及系统,包括以下步骤:计算出离合器与驱动电机的输出轴相连的一端的转速n1;调节与离合器的另一端连接的发动机的输出轴的转速n2,若转速n1和转速n2的转速差小于等于阈值一,且持续时间达到阈值二;HTCU根据需求扭矩和预设的偏置扭矩,计算出离合器的需求油压P2,调节CAP电机的转速,使离合器的油压达到需求油压P2,以实现所述驱动电机的输出扭矩的调节;使动力系统由串联模式切换至并联模式。本发明动力系统由串联模式切换至并联模式,可有效减小离合器结合时产生的惯量冲击,减少卡顿现象。控制易实现,控制精度更高。
Control method and system for switching of series-parallel connection modes of power system of hybrid electric vehicle
混动汽车动力系统串并联模式切换的控制方法及系统
2022-08-19
Patent
Elektronische Ressource
Chinesisch
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 / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES |
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