Author(s)

XinHai Chen^1,2*, Min Zeng², HaiJiang Xu², QiRui Jiang²

Affiliation(s)

¹College of Automotive Engineering, Tongji University, Shanghai 201804, China.

²Jiangling Motors Co.,Ltd., Nanchang 330000, Jiangxi, China.

Corresponding Author

XinHai Chen

ABSTRACT

Based on a real driving emission test conducted on a heavy-duty diesel truck equipped with PEMS equipment under cold start and low-load conditions, this study investigates the influence of the EHC (electric heating catalyst) placement on the exhaust temperature, NO_x conversion efficiency, and EHC power consumption of the heavy-duty diesel vehicle's after-treatment system. The two after-treatment schemes tested are EHC+DOCoF+SCR+ASC (Scheme 1) and DOCoF+EHC+SCR+ASC (Scheme 2). The research findings indicate that, in Scheme 1, the temperatures at T4 (at the front end of the after-treatment system), T5 (after the DOCoF), and T6 (before the SCR) are higher than those in Scheme 2 during both cold start and  low-load conditions. During the cold start phase, Scheme 1 excels in terms of urea injection timing, NO_x conversion efficiency, and EHC power consumption compared to Scheme 2. In the low-load phase, Scheme 1 outperforms Scheme 2 in terms of EHC power consumption, while its NO_x conversion efficiency is comparable to that of Scheme 2.

KEYWORDS

Heavy-duty diesel vehicle; Electric heating catalyst; Real driving emission; Layout position; After-treatment

CITE THIS PAPER

XinHai Chen, Min Zeng, HaiJiang Xu, QiRui Jiang. The influence of electric heating catalyst placement on the after-treatment performance of heavy-duty diesel vehicles. Eurasia Journal of Science and Technology. 2025, 7(4): 7-13. DOI: https://doi.org/10.61784/ejst3095.

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