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Real-world measurement and mechanical-analysis-based-verification of NOx and CO2 emissions from in-use heavy-duty vehicle
Atmospheric Measurement Techniques ( IF 3.8 ) Pub Date : 2020-09-07 , DOI: 10.5194/amt-2020-286
Hiroo Hata , Kazuo Kokuryo , Takehiko Ogata , Masahiko Kugata , Koichi Yanai , Megumi Okada , Chikage Funakubo , Minoru Yamazaki , Junya Hoshi

Abstract. A portable emission measurement system (PEMS) was used to measure the real-world driving emissions pertaining to a Japanese middle-sized heavy-duty vehicle. The testing was performed with the vehicle being driven in the metropolitan area of Tokyo in four seasons (January, June, August, and November) to analyze the seasonal dependence of NOx and CO2 emissioans. The experimental results indicated that the amount of NOx emissions was particularly high in the cold season, owing to the slow starting of the NOx detoxification systems, that is, the exhaust gas recirculation and urea-selective-catalytic-reduction systems, under low ambient temperature conditions. In the real-world driving, a high acceleration pattern was observed in the low-speed region, which is not considered in the world harmonized vehicle cycle, which is the worldwide official driving mode in the chassis dynamometer experiment. Finally, the transient emission tables for NOx and CO2 were constructed based on the PEMS measurement results and the classical mechanic theory. The constructed tables well replicated the experimental results in all the considered conditions involving different ambient temperatures and locations. The proposed approach can be used to evaluate emission inventories in the future.

中文翻译:

使用中的重型车辆的NO x和CO 2排放的真实测量和基于机械分析的验证

摘要。便携式排放物测量系统(PEMS)用于测量与日本中型重型车辆有关的实际驾驶排放物。该测试在车辆驱动在东京的四季(一月,六月,八月,十一月)首都圈分析NO的季节依赖性进行X和CO 2 emissioans。实验结果表明,NO的量X的排放是特别高的在寒冷的季节,由于NO的缓慢起动X在低环境温度条件下的排毒系统,即废气再循环和尿素选择性催化还原系统。在现实世界的驾驶中,在低速区域观察到了高加速模式,这在世界协调的车辆周期中并未考虑到,这是底盘测功机实验中的全球官方驾驶模式。最后,基于PEMS的测量结果和经典力学理论,建立了NO x和CO 2的瞬态排放表。所构建的表格很好地复制了在所有考虑的条件下(涉及不同的环境温度和位置)的实验结果。所提出的方法可用于评估未来的排放清单。
更新日期:2020-09-08
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