The invention discloses an engine starting control method and system under a static working condition, and relates to the technical field of hybrid electric vehicles, and the method comprises the following steps: calculating an engine resistance moment based on an engine starting kinematics model; based on the engine starting kinetic model, the motor rotating speed, the engine rotating speed and the transmission shaft torque serve as state variables, the motor torque serves as a control variable, the engine resistance torque serves as an interference variable, and the motor rotating speed and the engine rotating speed serve as output variables, and a state equation is constructed; a Luenberger type system state observer is constructed; and based on the Luenberger type system state observer, a preset engine rotating speed curve and a preset motor rotating speed curve, rotating speed curve trajectory tracking is carried out, so that an optimal control law is obtained, and the optimal torque of the motor in the process of reversely dragging and starting the engine through the transmission shaft is represented. While starting rapidity is guaranteed, the torque peak value of the transmission shaft is reduced, and the use reliability of the transmission shaft is effectively guaranteed.
本申请公开一种静止工况下发动机启动控制方法及系统,涉及混合动力汽车技术领域,方法包括:基于发动机启动运动学模型计算发动机阻力矩;基于发动机启动动力学模型,将电机转速、发动机转速及传动轴转矩作为状态变量,将电机转矩作为控制变量,将发动机阻力矩作为干扰变量,将电机转速及发动机转速还作为输出变量,构建状态方程;构建Luenberger型系统状态观测器;基于Luenberger型系统状态观测器、预设发动机转速曲线及预设电机转速曲线,进行转速曲线轨迹跟踪,以得到最优控制律,表征电机在通过传动轴反拖启动发动机过程中的最优转矩。本申请保证启动快速性的同时,降低了传动轴转矩峰值,有效保证传动轴的使用可靠性。
Engine starting control method and system under static working condition
一种静止工况下发动机启动控制方法及系统
2024-12-31
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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