环境温度对汽油缸内直喷汽车排放的影响

胡守信; 赵耀炜; 李兴虎

doi:10.13700/j.bh.1001-5965.2020.0031

环境温度对汽油缸内直喷汽车排放的影响

doi: 10.13700/j.bh.1001-5965.2020.0031

北京航空航天大学交通科学与工程学院, 北京 100083

基金项目:

国家重点研发计划 2017YFB0103402

详细信息

作者简介:
胡守信男, 硕士研究生。主要研究方向: 汽车环境保护技术、汽车新能源和电动汽车

李兴虎男, 博士, 教授, 博士生导师。主要研究方向: 汽车环境保护技术、汽车新能源和电动汽车

通讯作者:
李兴虎, E-mail: lxh@buaa.edu.cn

中图分类号: U467.1
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出版历程
- 收稿日期: 2020-01-21
- 录用日期: 2020-04-09
- 网络出版日期: 2021-04-20

Impact of ambient temperature on GDIV emission

School of Transportation Science and Engineering, Beihang University, Beijing 100083, China

Funds:

National Key R & D Program of China 2017YFB0103402

More Information

Corresponding author: LI Xinghu, E-mail: lxh@buaa.edu.cn

摘要

摘要:
选取2辆典型汽油缸内直喷汽车(GDIV)，在环境舱内进行了不同环境温度下，车辆冷启动和热启动后按照全球轻型车统一测试循环(WLTC)运行时的排气污染物试验，测量并分析了GDIV排气中的气态污染物和颗粒物，旨在为GDIV排放系统设计、控制策略制定以及评价汽车排放对环境影响的相关研究提供理论依据。研究结果表明：环境温度对GDIV试验车辆冷启动和热启动的颗粒物数量(PN)和颗粒物质量(PM)排放因子影响显著。环境温度低于14℃，冷启动工况下行驶时PN排放难以满足国Ⅵ排放标准限值，总碳氢化合物(THC)和CO的排放因子受温度的影响显著，热启动时影响不明显。无论是热启动还是冷启动工况，当温度从-7℃逐步上升到40℃时，试验车辆的CO₂排放因子呈现先减少后增加的变化规律，2辆车在热启动时的CO₂排放因子比冷启动时平均降低4%和7%。冷启动和热启动时，氮氧化物(NO_x)排放因子受温度的影响均没有明显的规律。
- 环境温度 /
- 气体排放 /
- 颗粒物排放 /
- 汽油缸内直喷式发动机 /
- 汽油车
Abstract:
Two typical Gasoline Direct Injection Vehicles (GDIVs) were selected, and emission tests in the environmental cabin were performed under Worldwide harmonized Light-duty rehicles Test Cycle (WLTC) at different ambient temperatures after the vehicles cold-started and hot-started. The gaseous pollutants and particulates in GDIV emissions were measured and analyzed with the aim of providing a theoretical basis for the GDIV emission system design and control, as well as for related research to evaluate the impact of automobile emissions on the environment. The results show that ambient temperature has a significant effect on the Particle Number (PN) and Particle Matter (PM) emission factor of the tested vehicles. The PN emission factor under the cold start condition is difficult to meet the China 6 emission limit when ambient temperature is below 14℃. The emission factors of Total Hydrocarbons (THC) and CO are significantly affected by temperature under cold start condition but are not significantly affected under hot start condition. Regardless of the hot start or cold start conditions, when the temperature gradually rises from -7℃ to 40℃, the CO₂ emission factor of the test vehicle first decreases and then increases, and the CO₂ emission factor of the two vehicles during hot start is reduced by 4% and 7% on average compared to cold start. There is no obvious rule of Nitrogen Oxide (NO_x) emission factor influenced by temperature under cold start and hot start conditions.
- ambient temperature /
- gas emission /
- particulate emission /
- gasoline direct injection engine /
- gasoline vehicle

HTML全文

图 1 WLTC排放测试工况

Figure 1. WLTC emission test condition

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图 2 试验流程

Figure 2. Test flowchart

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图 3 冷启动和热启动下环境温度对THC排放因子的影响

Figure 3. Effect of environment temperature on THC emission factors under cold and hot start conditions

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图 4 冷启动和热启动下环境温度对CO排放因子的影响

Figure 4. Effect of environment temperature on CO emission factors under cold and hot start conditions

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图 5 冷启动和热启动下环境温度对NO_x排放因子的影响

Figure 5. Effect of environment temperature on NO_x emission factors under cold and hot start conditions

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图 6 冷启动和热启动下环境温度对CO₂排放因子的影响

Figure 6. Effect of environment temperature on CO₂ emission factors under cold and hot start conditions

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图 7 冷启动和热启动下环境温度对PN排放因子的影响

Figure 7. Effect of environment temperature on PN emission factors under cold and hot start conditions

下载: 全尺寸图片幻灯片

图 8 冷启动和热启动下环境温度对PM排放因子的影响

Figure 8. Effect of environment temperature on PM emission factors under cold and hot start conditions

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表 1 试验车辆及其主要性能参数

Table 1. Test vehicles and their main performance parameters

参数	V1	V2
供油方式	GDI	GDI
进气方式	自然吸气	涡轮增压
排量/L	3	2
最大功率/kW	172	155
变速箱	AT	AT
工信部油耗/(L·(100 km)^-1)	9.8	7.1
整备质量/kg	2 291	1 581

下载: 导出CSV

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