The invention relates to the technical field of cruise mode control strategies, in particular to a cruise control method and system for a pure electric vehicle based on definite-effect cruise, and the cruise control method for the pure electric vehicle comprises the steps: obtaining a motor efficiency torque Map map and a preset target efficiency value, determining a target efficiency curve, and calculating a running resistance curve of the vehicle in real time; target efficiency torque is calculated according to the current motor rotating speed and the target efficiency curve, current driving resistance is calculated according to the current motor rotating speed and the driving resistance curve, and the current motor torque is adjusted to be the target efficiency torque; a cruise mode is determined according to the magnitude relation between the target efficiency torque and the current driving resistance and the current vehicle speed u, the motor torque is adjusted in real time according to the cruise mode, and the cruise mode comprises a constant-speed cruise mode and a constant-effect cruise mode. According to the invention, the vehicle is allowed to adaptively adjust the torque in a certain speed interval, and the motor always works in a set higher efficiency range in the speed interval, so that the effects of reducing the power consumption and improving the endurance are achieved.
本发明涉及巡航模式控制策略技术领域,具体涉及一种基于定效巡航的纯电动车巡航控制方法及系统,纯电动车巡航控制方法包括:获取电机效率扭矩Map图以及预设的目标效率值,确定目标效率曲线,实时计算车辆的行驶阻力曲线;根据当前电机转速和目标效率曲线计算目标效率扭矩,根据当前电机转速和行驶阻力曲线计算当前行驶阻力,将当前电机扭矩调整为目标效率扭矩;根据目标效率扭矩与当前行驶阻力的大小关系、当前车速u确定巡航模式,根据巡航模式实时调整电机扭矩,其中,巡航模式包括定速巡航模式和定效巡航模式。本发明允许车辆在一定速度区间内自适应调节扭矩,在此速度区间内电机始终工作在设定的较高效率范围内,达到降低电耗提升续航的效果。
Cruise control method and system for pure electric vehicle based on constant-effect cruise
一种基于定效巡航的纯电动车巡航控制方法及系统
2024-12-10
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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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