48 V轻混乘用车的驾驶性客观评价方法

Objective Evaluation Method of Driveability of 48 V Light Hybrid Passenger Car

48 V轻混乘用车在新欧洲驾驶循环工况下可达到10%以上的节能效果,对整车动力性也有提升效果。为了研究48 V系统在带来节能效果的基础上对驾驶性能的影响程度,论文对燃油基础车型和在该基础上加装48 V系统的同平台车型的两款市售车型进行了对比分析,运用主客观关联方法制定了四种工况下体现驾驶性能的响应时间、加速能力、抖动和冲击等主客观关联评价指标,并通过采集和计算车辆控制器局域网信号及加速度传感器信号数据,研究了两款车型在起步、急加速、制动减速和百公里加速四种工况下的动力响应性、驾驶平顺性以及乘坐舒适性在内的驾驶性能。研究结果表明,48 V系统对车辆动力响应性提升效果明显,特别是起步、急加速工况初期,最快可以缩短近35%的时间;48 V系统对于平顺性和舒适性也有一定程度的改善,但改善程度还受动力传动系统整体匹配水平的影响。

The 48 V light-hybrid passenger car can achieve an energy-saving effect of more than 10%under New European Driving Cycle conditions, which also improves the dynamics of the vehicle. In order to study the impact of the 48 V system on the driving performance based on the energy-saving effect, a comparative analysis was carried out on the fuel-based vehicle and the same platform vehicle with the 48 V system on the basis of the comparison and analysis, using subjective and objective. The correlation method has developed subjective and objective correlation evaluation indicators that reflect driving performance under four working conditions, such as response time, acceleration ability, jitter, and impact. By collecting and calculating vehicle Controller Area Network signal and acceleration sensor signal data, the two models are studied at the start.Driving performance including dynamic response, driving smoothness and ride comfort under four working conditions: rapid acceleration, braking deceleration and acceleration from 100 kilometers. The research results show that the 48V system has a significant effect on improving the vehicle’s dynamic response, especially in the initial start and rapid acceleration conditions, the fastest time can be shortened by nearly 35%;the 48 V system also has a certain degree of improvement in ride comfort and comfort, but The degree of improvement is also affected by the overall matching level of the power transmission system.