不同海拔下国Ⅵ重型柴油车实际道路NO<sub><i>x</i></sub>排放特性

吉江林; 郑永明; 李世峰; 黄从魁; 刘典云; 何超

doi:10.12153/j.issn.1674-991X.20230322

不同海拔下国Ⅵ重型柴油车实际道路NO_x排放特性

doi: 10.12153/j.issn.1674-991X.20230322

吉江林^1,,
郑永明^1, ,,
李世峰¹,
黄从魁¹,
刘典云¹,
何超^{2, 3}

1.
中汽研汽车检验中心（昆明）有限公司
2.
西南林业大学机械与交通学院
3.
云南省高校高原山区机动车环保与安全重点实验室

基金项目: 国家自然科学基金项目（51968065）

详细信息

作者简介:
吉江林（1994—），男，硕士，主要从事车辆污染排放与控制研究，jij_lin@163.com

通讯作者:
郑永明（1983—），男，高级工程师，主要从事机动车排放控制技术研究，zhengyongming@catarc.ac.cn

中图分类号: X734.2
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- 文章访问数: 203
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- 被引次数: 0
出版历程
- 收稿日期: 2023-04-26
- 录用日期: 2023-10-16
- 修回日期: 2023-08-10

Real driving NO_x emission characteristics of China Ⅵ heavy-duty diesel vehicles at different altitudes

1.
CATARC Automotive Test Center (Kunming) Co., Ltd.
2.
School of Mechanical and Traffic Engineering, Southwest Forestry University
3.
Key Laboratory of Vehicle Environmental Protection and Safety in Plateau Mountain Area of Yunnan Provincial Colleges

摘要

摘要:
为了解不同海拔下国Ⅵ重型柴油车的NO_x排放特性，利用便携式排放测试系统（PEMS）在4个不同海拔城市（襄阳、昆明、丽江和香格里拉）对国Ⅵ重型柴油车进行实际道路排放测试。结果表明：随着海拔高度的升高，NO_x排放呈现增加趋势，高海拔下的平均NO_x排放速率是平原的4.65~20.58倍，NO_x综合排放因子是平原的2.80~13.75倍；不同载荷条件下香格里拉的NO_x 综合排放因子是襄阳、昆明和丽江的1.27~13.75 倍；市区路的NO_x排放因子是市郊路和高速路的1.05~6.49倍，且香格里拉市区路的排放因子超过400 mg/km；在Bin 11~Bin 14和Bin 21~Bin 28区间，随着机动车比功率（VSP）的升高，NO_x排放速率表现出先增大后减小的趋势；不同海拔下车辆从市区路到市郊路、市郊路到高速路行驶时，NO_x瞬时排放速率出现峰值；NO_x高排放区域集中在高转速、高扭矩区间；海拔与平均NO_x排放因子的决定系数为0.86，表现出较强的正相关关系。
- 海拔 /
- NO_x排放因子 /
- 国Ⅵ重型柴油车 /
- 实际道路排放
Abstract:
To understand the NO_x emission characteristics of China Ⅵ heavy-duty diesel vehicles at different altitudes, a portable emission measurement system (PEMS) was used to conduct real driving emission tests on China Ⅵ heavy-duty diesel vehicles in four cities with different altitudes (including Xiangyang, Kunming, Lijiang and Shangri-la). This study showed that with the increase of altitude, NO_x emission showed an increasing trend, and the average NO_x emission rate under high altitude was 4.65-20.58 times that of the plain, and NO_x emission factor was 2.80-13.75 times that of the plain. NO_x emission factors of Shangri-la were 1.27-13.75 times higher than those of Xiangyang, Kunming and Lijiang under different load conditions. NO_x emission factors of urban road were 1.05-6.49 times higher than those of suburban road and freeway, and the emission factors of urban road in Shangri-la exceeded 400 mg/km. In the interval of Bin 11-Bin 14 and Bin 21-Bin 28, NO_x emission rates showed a trend of increases followed by decreases with the increase of VSP. NO_x instantaneous emission rate peaked when the vehicles drove from urban road to suburban road and suburban road to freeway at different altitudes. The high NO_x emission area was concentrated in the high speed and high torque range. The coefficient of determination between altitude and the average NO_x emission factor was 0.86, which showed a fair positive correlation.
- altitude /
- NO_x emission factor /
- China Ⅵ heavy-duty diesel vehicle /
- real driving emission

HTML全文

图 1 50%载荷条件下国Ⅵ重型柴油车不同海拔下的排气温度

Figure 1. Exhaust temperature of China Ⅵ heavy-duty diesel vehicle at different altitudes under 50% load condition

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图 2 50%载荷条件下国Ⅵ重型柴油车不同海拔下的NO_x瞬时排放速率

Figure 2. Instantaneous NO_x emission rates of China Ⅵ heavy-duty diesel vehicle at different altitudes under 50% load condition

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图 3 100%载荷条件下国Ⅵ重型柴油车不同工况下的平均NO_x排放速率

Figure 3. Average NO_x emission rates of China Ⅵ heavy-duty diesel vehicle under different operating modes with100% load condition

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图 4 100%载荷条件下国Ⅵ重型柴油车在丽江的NO_x瞬时排放速率

Figure 4. Instantaneous NO_x emission rates of China Ⅵ heavy-duty diesel vehicle at Lijiang under 100% load condition

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图 5 不同海拔下国Ⅵ重型柴油车的NO_x排放因子

Figure 5. NO_x emission factors of China Ⅵ heavy-duty diesel vehicle at different altitudes

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图 6 平均海拔与平均NO_x排放因子的关系

Figure 6. Relationship between average altitude and average NO_x emission factor

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表 1 重型柴油车在不同测试路线下的信息

Table 1. Information on heavy-duty diesel vehicle under different test routes

测试城市	试验路线平均海拔/m	测试路段长度/km	平均环境温度/℃	平均相对湿度/%
襄阳	104.46±1.77	127.62±5.18	32.87±2.73	54.17±14.15
昆明	1 961.06±4.02	136.23±0.46	28.37±2.52	52.21±9.15
丽江	2 371.30±20.56	147.53±5.43	15.07±1.36	93.50±5.22
香格里拉	3 293.42±1.90	149.59±2.65	10.35±4.83	77.53±20.44

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表 2 基于速度、加速度和VSP的工况区间划分

Table 2. Definition of driving condition bins based on velocity, acceleration and VSP

VSP/（kW/t）	加速度/（m/s²）	车速/（km/h）
VSP/（kW/t）	<−0.9	<1.6	1.6~40	40~80	≥80
	Bin 0（减速/ 制动工况）	Bin 1 （怠速工况）
<0			Bin 11	Bin 21
0~3			Bin 12	Bin 22
3~6			Bin 13	Bin 23
6~9			Bin 14	Bin 24
9~12				Bin 25
12~18				Bin 27	Bin 37
18~24				Bin 28	Bin 38
24~30					Bin 39
<6					Bin 33
6~12					Bin 35

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表 3 本研究测试车辆的平均NO_x排放因子与其他研究结果比较

Table 3. Comparison of the average NO_x emission factor of the vehicles tested in this study with the results of other studies

测试城市（县）	测试平均海拔/m	后处理技术	排放标准	NO_x排放因子/（g/km）	数据来源
襄阳	104.46±1.77	DOC+DPF+ SCR+ASC	国Ⅵ	0.01	本研究
昆明	1 961.06±4.02			0.04
丽江	2 371.30±20.56			0.07
香格里拉	3 293.42±1.90			0.12
天津	0	DOC+DPF+ SCR	欧Ⅵ	0.11	文献[24]
太原	765			0.07
建水	1 344			0.15
昆明	1 914			0.09
丽江/西宁	2 322/2 334			0.14
海晏	3 050			0.09
厦门/北京		DOC+DPF+ SCR	国Ⅵ	0.12	文献[25]
赤峰		DOC+SCR	国Ⅵ	0.11	文献[26]
晋中		DOC+SCR+ ASC	国Ⅵ	0.18	文献[27]
注：DOC为氧化催化转化器，DPF为柴油机颗粒捕集器，SCR为选择性催化还原系统，ASC为氨逃逸催化器。

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