The invention discloses a winter driving index calculation method and system for an electric vehicle in a winter driving environment, and the method comprises the steps: determining a thermal control index, a chassis control index and a road friction index through determining the working condition of a driving road; the heat control index, the chassis control index and the road friction index are fused and calculated to generate a winter driving index, and the driving torque is optimized according to the winter driving index; according to the method, the accuracy and reliability of road friction force calculation in an electric vehicle control system are improved, and road friction force calculation in a control strategy is started under more stable and conservative conditions, so that high reliability and accuracy of numerical values are ensured; according to the method, the winter driving index is calculated by adopting a more comprehensive calculation method, road noise in a short time can be filtered, and the situation that the road friction force is measured mistakenly or a control system excessively reacts to the estimated road friction force value is avoided; the winter driving index not only facilitates optimization of braking force, but also facilitates optimization of driving force of a transmission system.
本发明公开了一种电动汽车冬季驾驶环境的冬季驾驶指数计算方法及系统,其中,方法包括通过确定行驶道路工况,确定热控制指数、底盘控制指数和道路摩擦力指数;将热控制指数、底盘控制指数与道路摩擦力指数融合计算生成冬季驾驶指数,根据冬季驾驶指数优化驾驶扭矩;本发明提高电动汽车控制系统中道路摩擦力计算的精准度与可靠性,本发明控制策略中道路摩擦力计算在更稳定和保守的条件下启动,以确保数值地高度可靠性和准确性;本发明将采用更加全面的计算方法计算冬季驾驶指数,可滤波掉短时间内的道路噪音,以免误测道路摩擦力或控制系统对估算的道路摩擦力值的过度反应;冬季驾驶指数不仅有利于优化制动力,也有利于优化传动系统的驱动力。
Method and system for calculating winter driving index of electric vehicle in winter driving environment
电动汽车冬季驾驶环境的冬季驾驶指数计算方法及系统
2023-12-29
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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