DOC+CDPF对国III重型柴油货车实际道路排放的影响

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Abstract

On-road emission measurements of two typical China III heavy-duty diesel trucks with and without diesel oxidation catalytic converter (DOC) and catalyzed diesel particulate filter (CDPF), have been conducted by using a portable emission measurement system (PEMS). The results indicated that real-world emissions of CO, THC, solid particle number (SPN) and black carbon (BC) from the two retrofittedvehicleswere (1.31±0.37) g/(kW×h), (0.20±0.03) g/(kW×h), (7.13×10¹⁰±5.27×10¹⁰)particle/(kW×h) and (0.69±0.06) mg/(kW×h), respectively. Compared with the original emissions (i.e., DOC+CDPF removed), these emissions were reduced by 52.48%, 55.69%, 99.91% and 99.22%, respectively. From low-speed, medium-speed to high-speed driving conditions, the reduction ratio of CO and THC showed an upward trend, butthere was no significant difference in the emission reduction of SPN and BC under various operating conditions. Retrofitting with DOC+CDPF had no significant reduction effect on NO_x emissions, which were 9.53 to 9.83g/(kW×h), higher than the emission limit. However, the proportions of NO₂ in NO_x were increased, and the elevations got enhanced from low-speed, medium-speed to high-speed driving conditions.

Key words： heavy-duty diesel trucks in-use vehicle retrofitted DOC+CDPF particulate matter NO_x portable emission measurement system (PEMS)

Received: 11 November 2019

PACS:

X701.7

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	Articles by authors
	CHENG Ying
	HE Li-qiang
	ZHANG Shao-jun
	HU Jing-nan
	ZHENG Xuan
	HE Wei-nan
	CHEN Yan-yan
	WU Ye

Cite this article:

CHENG Ying,HE Li-qiang,ZHANG Shao-jun等. Impacts of DOC+CDPF on real-world emissions from China III heavy-duty diesel trucks[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(6): 2381-2388.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I6/2381

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