重型商用车瞬态工况NOx排放特征分析

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【摘要】为分析瞬态工况对重型商用车NOx排放的影响,通过对重型商用车瞬态运行工况进行分类,在冷车起步、行驶中停车起步、通过高速公路收费口、超越加速4个典型工况下针对NOx排放特征开展试验研究,结果表明:瞬态工况会引起NOx排放量升高,尿素溶液的消耗量相对于稳态工况增加了约0.86~4倍。

关键词:重型商用车 瞬态工况 NOx排放 超越加速

中图分类号:U467.1+1   文献标志码:A   DOI: 10.20104/j.cnki.1674-6546.20230080

Analysis of NOx Emission Characteristics of Heavy-Duty Commercial Vehicles in Transient Conditions

Liu Gang1,2, Li Jingjing1,2, Wang Xingyuan1,2, Li Jiandong1,2

(1. State Key Laboratory of Engine Reliability, Weifang 261061; 2. R&D Center, Weichai Power Co., Ltd., Weifang 261061)

【Abstract】To analyze the influence of transient conditions on NOx emission of heavy duty commercial vehicles, by classifying the transient operating conditions of heavy-duty commercial vehicles, the NOx emission characteristics were tested under four typical operating conditions, including cold car start, stop and start while driving, driving through highway toll gates, and overtaking acceleration. The test results show that the transient condition will cause the NOx emission to rise, and increase the consumption of urea solution, which is about 0.86~4 times of the steady condition.

Key words: Heavy-duty Commercial Vehicles, Transient conditions, NOx emissions, Overtaking acceleration

【引用格式】 刘刚, 李静静, 王兴元, 等. 重型商用车瞬态工况NOx排放特征分析[J]. 汽车工程师, 2024(6): 42-48.

LIU G, LI J J, WANG X Y, et al. Analysis of NOx Emission Characteristics of Heavy-Duty Commercial Vehicles in Transient Conditions[J]. Automotive Engineer, 2024(6): 42-48.

1 前言

车辆行驶过程中,受车型、地形、路况、驾驶行为等的影响,动力系统经常处于瞬态运行工况,其性能、污染物排放量等与稳态工况差异较大[1]。(剩余5686字)

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