NOx Emission of a Correlation between the PEMS and SEMS over Different Test Modes and Real Driving Emission

Young Soo Yu, Jun Woo Jeong, Mun Soo Chon and Junepyo Cha
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Young Soo Yu: Department of Automotive Engineering, Korea National University of Transportation, Chungju 27469, Korea
Jun Woo Jeong: Department of Automotive Engineering, Korea National University of Transportation, Chungju 27469, Korea
Mun Soo Chon: Department of Automotive Engineering, Korea National University of Transportation, Chungju 27469, Korea
Junepyo Cha: Department of Automotive Engineering, Korea National University of Transportation, Chungju 27469, Korea

Energies, 2021, vol. 14, issue 21, 1-21

Abstract: The aim of this study is to verify the reliability of NOx emissions measured using Smart Emissions Measurement System (SEMS) equipment in comparison with the NOx emissions measured using certified Portable Emissions Measurement System (PEMS) equipment. The SEMS equipment is simple system, and it is less expensive than the PEMS equipment, as it comprises an On-Board Diagnostics (OBD) signal from the test vehicle and a NOx sensor. The SEMS equipment based on low-cost sensors has an advantage of building big data, but there are insufficient previous studies comparing of NOx emissions with certified the PEMS equipment. Therefore, this study is important in verifying the suitability of the SEMS equipment by comparing the NOx emissions measured by the various test modes and RDE using the two types of equipment. To analyze the correlation between the PEMS and SEMS equipment, the advanced diesel vehicle was equipped with the two types of equipment to simultaneously measure NOx emissions. After installing the equipment on the test vehicle, it was conducted under various test modes in the laboratory and the Real Driving Emission (RDE) test to verify the correlation of NOx emissions measured by the SEMS equipment. The correlation analysis for the NOx emissions measured by the PEMS and SEMS equipment under various test conditions and the RDE test indicated that the slope of the NOx emissions was approximately equal to 1, and the coefficient of determination was 0.9 or higher. Based on these test results, it was concluded that NOx emissions measured by the PEMS and SEMS equipment are highly similar.

Keywords: worldwide harmonized light-duty vehicle test cycle; real driving emissions; portable emissions measurement system; smart emissions measurement system (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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