Title: Type B uncertainty evaluation for real driving emission test based on second-by-second data

Authors: Yang Ge; Pan Hou; Jiaqi Chen; Yitu Lai; Sheng Su; Zhe Ji

Addresses: Department of Science, Tianjin University of Technology and Education, No. 1310 Dagu South Road, Hexi District, Tianjin, 300222, China ' Xiamen Environment Protection Vehicle Emission Control Technology Center (VETC), No. 98 Jinlong Road, Jimei District, Xiamen 361023, Fujian Province, China ' Xiamen Environment Protection Vehicle Emission Control Technology Center (VETC), No. 98 Jinlong Road, Jimei District, Xiamen 361023, Fujian Province, China ' Xiamen Environment Protection Vehicle Emission Control Technology Center (VETC), No. 98 Jinlong Road, Jimei District, Xiamen 361023, Fujian Province, China ' Xiamen Environment Protection Vehicle Emission Control Technology Center (VETC), No. 98 Jinlong Road, Jimei District, Xiamen 361023, Fujian Province, China ' Hefei Institutes of Physical Science, University of Science and Technology of China, No. 350 Shanhu Road, Luyang District, Hefei, 230031, China

Abstract: Recently, real driving emissions (RDE) has become an indispensable complement to traditional laboratory test. However, the measurement of RDE through portable emissions measurement systems (PEMS) is acknowledged to be of non-ignorable uncertainty. In this paper, a second-by-second Type B evaluation is proposed on the theoretical basis of EN17507. Through source decomposition, matrix manipulation and Monte Carlo simulation, the calculation procedure is summarised into a brief algorithm convenient for practical use. A set of RDE experiments is carried out with 12 China-VI light-duty vehicles (LDVs). With the proposed evaluation approach, commonness and speciality of current PEMS uncertainty for four main pollutants are analysed.

Keywords: measurement uncertainty; portable emissions measurement systems; PEMS; real driving emissions; RDE test; type B evaluation; emission monitoring.

DOI: 10.1504/IJVP.2024.142081

International Journal of Vehicle Performance, 2024 Vol.10 No.4, pp.447 - 465

Received: 25 Dec 2023
Accepted: 20 Jun 2024
Published online: 07 Oct 2024 *

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