增程式电动皮卡四驱动力传动系统设计

毛理想，钟兵^*，吴芷红

山东交通学院汽车工程学院，山东 济南  250357

摘要：为保证某增程式电动皮卡性能，对其四驱动力传动系统参数进行优化设计，基于MATLAB软件建立包含前后驱动电机、两挡变速器、动力电池、增程器的双电机四驱架构数学模型；根据该皮卡整车基本参数和行驶性能要求，采用序列二次规划（sequential quadratic programming，SQP）算法计算前后驱动电机最优性能参数；为提高车辆经济性，设计前后驱动电机两挡变速器传动比、动力电池容量配置、增程器参数；基于新欧洲驾驶循环（new European driving cycle，NEDC），仿真分析车辆在等速、加速等工况下电池组能量消耗，计算车辆续驶里程，验证增程式电动四驱动力系统参数设计的合理性。结果表明：设计的前后驱动电机的性能参数可使整车电机最大总功率为220 kW，电机最大总转矩为621 N·m，完全满足最高车速为165 km/h、车速从0加速到100 km/h的加速时间为8 s、车速为30 km/h时的最大爬坡度为50%的动力性能指标；采用优化的整车动力系统参数后，NEDC循环工况续驶里程为124.78 km，满足续驶里程不得小于120 km的设计要求。

关键词：增程式电动皮卡；四驱动力传动系统；MATLAB仿真；NEDC

Design of four-wheel drive power transmission system forrange-extended electric pickup

MAO Lixiang, ZHONG Bing^*, WU Zhihong

School of Automotive Engineering, Shandong Jiaotong University, Jinan 250357,China

Abstract: In order to ensure the performance of a certain range-extended electric pickup, the parameter design of the four-wheel drive power transmission system of the range-extended electric pickup is studied. Based on MATLAB software, a mathematical model of a dual-motor four-wheel drive architecture including front and rear drive motors, a two-speed transmission, a power battery, and a range extender is established. According to the basic parameters and driving performance requirements of the pickup, the optimal performance parameters of the front and rear drive motors are calculated using the sequential quadratic programming (SQP) algorithm. In order to improve vehicle economy, the gear ratio of the two-speed transmission of the front and rear drive motors, configuration of the power battery capacity, and the parameters of the range extender are designed. Based on the new European driving cycle (NEDC), the energy consumption of the pack under constant speed, acceleration, and other working conditions is simulated and analyzed, and the driving range of the vehicle is calculated to verify the rationality of the parameter design of the range-extended electric four-wheel drive power system. The results show that the designed front and rear drive motor performance parameters can make the total maximum power of the vehicle motor 220 kW, and the total maximum torque of the motor reaches 621 N·m, which fully meets the power performance index of the maximum vehicle speed of 165 km/h, the acceleration time from 0 to 100 km/h is 8 s, and the maximum climbing angle at a speed of 30 km/h is 50%. After using the optimized vehicle power system parameters, the driving range in the NEDC cycle working condition is 124.78 km which meets the design requirement that the driving range shall not be less than 120 km.

Keywords: range-extended electric pickup; four-wheel drive power transmission system; MATLAB simulation; NEDC