针对PHEV应用的新型有源传动装置动力性匹配设计及试验验证

Power Matching Design and Test Validation of a Novel Active Transmission for PHEV Application

摘要:

分析了新型定轴式车用有源传动装置多种动力传递路径的特征。针对PHEV应用,从最高车速,最大坡起能力以及后备功率三方面,给出了的不同整车工作模式下的动力性设计要求,说明了寻找一套全新的动力性匹配设计方法的必要性。按照不同整车工作模式下的后备功率要求,确定了动力源类型以及功率等级。按照最大坡起能力要求以及坡起过程中离合器滑磨功的限值,确定了一档速比。按照最高车速要求,确定了电机动力传递路径速比以及其余档位速比。介绍了原理样机以及样车的结构特征,基于NEDC工况完成了能耗测试,并且详细分析了期间在进行模式以及档位切换时实现轮边驱动力平顺的方法。

关键词:动力性匹配设计;定轴式有源传动装置;PHEV;离合器滑磨功;动力中断

Abstract:

Features of different power transmission paths of a novel fixed shaft active transmission were analyzed. From aspects of maximal velocity, ramp start capability and backup power, dynamic property requirements of different vehicle modes were given, the necessity of a new power matching design method was explained. According to backup power requirements, types and power ratings of power sources were selected. According to ramp start capability requirements and maximal clutch slipping work during ramp start, 1_st gear ratio was determined. According to maximal velocity requirements, drive motor power transmission paths ratios and remaining gear ratios were calculated. Structural features of EMT prototype and vehicle prototype were described, Based on NEDC, energy consumption test was realized. The methods to realize smooth drive torque at wheels during mode or gear switch was were explained in details.

Key words:power matching design; fixed shaft active transmission; PHEV; clutch slipping work; Power interrupt