关键词: 48 V；轻混系统；驾驶性；动力响应性；平顺性；客观评价

Abstract: 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.

Key words: 48 V; Light hybrid system; Drivability; Dynamic response; Harshness; Objective evaluation