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.
Highlights
Since September 2017, Republic of Korea and Europe have introduced Real DrivingEmission Light-Duty Vehicle (RDE-LDV) test to strengthen the emission regulations for light-duty diesel vehicles [1]
When the Real Driving Emission (RDE)-LDV test was first introduced in September 2017, it was regulated such that the Euro 6b regulation with the Conformity Factor (CF) of 2.1 during the RDE test
This study attempts to verify the reliability of NOx emissions meas3uorfe2d1 by the Smart Emissions Measurement System (SEMS) equipment by comparing the results with NOx emissions measured by the certified Portable Emissions Measurement System (PEMS) equipment
Summary
Emission Light-Duty Vehicle (RDE-LDV) test to strengthen the emission regulations for light-duty diesel vehicles [1]. The RDE-LDV test has been regulated to be measured by the Portable Emission Measurement System (PEMS, Sensors Inc., Saline, MI, USA). It faces challenges relating to the operation of complex equipment, the large size of the equipment, Currently, the RDE-LDV test has been regulated to be measured by the Portable. The purpose of this study is to simultaneously measure NOx emissions using PEMS and SEMS equipment on various real driving routes, considering the driving conditions in South Korea. This study attempts to verify the reliability of NOx emissions meas3uorfe2d1 by the SEMS equipment by comparing the results with NOx emissions measured by the certified PEMS equipment. Item RItoelmler Inertia weRioglhletrrange (kg) MMIaanxxeiimrmtiuaummwerroioglllhlstpsrpeaeendegde(k((mkkgm/)h/h) ) EElleeccttrriicc mmoottoorraabbssoorrbbeerrtytyppe e Speed deviation Torque deviation Driving distance measurement Cooling fan AVL Single Roll 48AVinLch (MIM type) Single Roll 44584i–n5ch44(8MIM type)
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