【作者】 杨帆；

【导师】 武一民；

【作者基本信息】 河北工业大学 ， 工程硕士（专业学位）， 2018， 硕士

【摘要】 针对当前装备起停技术的车辆在中国道路工况中对燃油消耗量及排放量的影响,本文通过实际道路及试验室测试等一系列研究,对装备启停系统车辆的燃油经济性与排放量进行了分析。本文首先阐述了起停技术的背景意义、国内外研究现状和关键技术等,分析了了自动启停技术的组成,主要包括驾驶员停车意图判断、发动机停机控制、驾驶员启动意图判断和车辆启动行驶等过程;然后对国内外实际道路工况特征数据进行详细的对比分析,确定了国内路况构建以及燃油消耗量和排放量测试的方法;之后通过采集国内具有代表性的城市和路段的行车数据,构建贴合我国现阶段实际道路情况的试验室开发工况,最后通过对装备及未装备车辆进行了实际道路及试验室的全面测试,得出装备起停系统的车辆在我国道路工况中对于燃油经济性及污染物排放量的影响。为更符合我国实际交通情况,更准确的测试起停系统对燃油经济性及污染物排放的影响,本项目选取了国内具有代表性的城市、时间段和路段,设计了实际道路实验方案,并由此构建了能够代表中国实际路况的工况循环。在实际测试中,选取七辆不同品牌的轻型乘用车进行实验,且这些车辆配置了不同起停系统（分属三个系统制造商）,用于更准确的测试起停系统对污染物排放量的影响。通过实际道路试验和实验室台架试验均表明起停技术能大幅降低车辆的评价油耗,怠速比例越高,节油效果越明显;在开发工况下,降低燃油消耗8.5～10.5%;在实际道路油耗测试中,随怠速比例变化约18～43%,对应燃油节省约7～19%。同时,选取四台不同型号的试验车进行轮毂试验,研究了停技术对排放的影响,其在降低CO₂方面效果显著,在NEDC-I部,降低燃油和CO₂排放5-10%,在开发工况下,CO₂排放8.5-10.5%;开启起停功能后,车辆在NEDC-I部工况下,NOx排放方面有较为明显的减排效果,但是在开发工况下NO_x排放变化不大;起停技术对其他污染物排放的影响较小。本课题基于实际道路试验建立了更能代表中国实际路况的开发工况循环,并在此基础上,通过实车和试验室测试,分析得出了装备起停系统的车辆在我国工况条件下也能够有效的降低燃油消耗量,也有助于降低污染物排放。更多还原

【Abstract】 The impact of current vehicle start-stop technology on fuel consumption and emissions in Chinese road conditions,this article has passed a series of studies including actual road and laboratory tests.The fuel economy and emissions of vehicles equipped with start-stop systems were analyzed.This paper first expounds the background significance of the start-stop technology,the research status at home and abroad,and key technologies,analyzed the composition of the automatic start-stop technology,it mainly includes the driver’s parking intention judgment,engine stop control,driver’s start intention judgment and vehicle start running;Then,a detailed comparative analysis of the actual road conditions data at home and abroad is carried out,and the method of constructing domestic road conditions and testing methods of fuel consumption and emissions are determined;After collecting driving data of representative cities and sections in China,build a laboratory development condition that fits the actual road conditions in China at this stage,finally,the actual roads and laboratories were thoroughly tested on equipment and unequipped vehicles,the impact of vehicle start-stop system on fuel economy and pollutant emissions in China’s road conditions is obtained.In order to better meet the actual traffic situation in China,more accurately test the impact of the start-stop system on fuel economy and pollutant emissions,this project selects representative cities,time periods and road sections in China,the actual road experiment plan was designed,and a cycle of conditions that can represent the actual road conditions in China was constructed.In the actual test,seven different brands of light passenger vehicles were selected for experiments,and these vehicles were equipped with different start-stop systems（three system manufacturers）for more accurate testing of the start-stop system for pollutant emissions.The impact of quantity.Through the actual road test and the laboratory bench test,it is shown that the start-stop technology can greatly reduce the fuel consumption of the vehicle.The higher the idle speed ratio,the more obvious the fuel-saving effect;Under development conditions,reduce fuel consumption by 8.5 to 10.5%;In the actual road fuel consumption test,the ratio of idle speed is about 18 to 43%,and the fuel saving is about 7 to 19%.At the same time,four different types of test vehicles were selected for wheel test,and the impact of stop technology on emissions was studied.It has a significant effect in reducing CO₂.In NEDC-I,it reduces fuel and CO₂emissions by 5-10%.Under the circumstance,CO₂emissions are 8.5-10.5%;After the start-stop function is activated,the vehicle has obvious emission reduction effects in terms of NOx emissions under the NEDC-I operating conditions,but the NOx emissions change little under development conditions;The start-stop technology has less impact on the discharge of other pollutants.Based on the actual road test,this project has established a development condition cycle that is more representative of China’s actual road conditions,on this basis,through the actual vehicle and laboratory test,it is concluded that the vehicle with the start-stop system can effectively reduce the fuel consumption under the working conditions in China,and also help to reduce pollutant emissions.更多还原