A Study Correlations of NOx Emissions between PEMS and SEMS of Light-Duty Diesel Vehicle in Real Driving According to Ambient Temperature and Cold Start

Yu, Young Soo; Jeong, Jun Woo; Kim, Seung Lee; Sim, Inhan; Chon, Mun Soo; Cha, Junepyo

doi:10.7467/ksae.2020.28.4.277

Cited by 1 publication

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“…HNCO + H 2 O → NH 3 + CO 2 (hydrolysis) (10) The NOx conversion is sensitive to temperature, and hydrolysis does not occur even if excess urea solution is injected under low temperatures. Therefore, the NOx conversion is possible, using the absorbed NH 3 of the urea solution.…”

Section: Detailed Analysis On Real-time Profiles Of Nox Emissions For Characteristics Of the Nox Conversion In Laboratorymentioning

confidence: 99%

“…To address these challenges, Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek (TNO) developed the Smart Emissions Measurement System (SEMS, TNO, Den Haag, The Netherlands) equipment based on low-cost sensors and vehicle On-Board Diagnostics (OBD) data. Several studies have extensively investigated the SEMS equipment [6][7][8][9][10][11][12]. As an example, the TNO reported that a correlation test was conducted to simultaneously measure the exhaust emissions with the SEMS equipment and the Constant Volume Sampler (CVS) equipment under laboratory test modes such as the New European Driving Cycle (NEDC), World-wide harmonized Light-duty vehicles Test Cycles (WLTC) and Common Artemis Driving Cycles (CADC).…”

Section: Introductionmentioning

confidence: 99%

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

Jeong

Chon

et al. 2021

Energies

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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.

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Section: Detailed Analysis On Real-time Profiles Of Nox Emissions For Characteristics Of the Nox Conversion In Laboratorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Jeong

Chon

et al. 2021

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

A Study Correlations of NOx Emissions between PEMS and SEMS of Light-Duty Diesel Vehicle in Real Driving According to Ambient Temperature and Cold Start

Cited by 1 publication

References 3 publications

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

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

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