The Environmental Protection Administration in Taiwan (Taiwan EPA) has been working on strengthening the emission control over diesel vehicles and developed comprehensive regulations, such as "The Procedure of Rebelling and Abolishing the Certificate of Emission Inspection for the Types of Diesel and other Alternative Fuel Engine Vehicles" to improve air quality and protect citzen’s health. However, the current lab test for light-duty vehicles does not reflect real-world emissions, and because of the US dieselgate issue, Taiwan EPA starts on a project to investgate real-world emissions from light-duty diesel vehicles in Taiwan with portable emission measurement system (PEMS). Real Driving Emission (RDE) is one of the developing measures in EU to monitor real-world emissions from vehicles with PEMS. RDE will be introduced into in-service conformity in EU. The aim of the project is to understand the real-world emission from light-duty diesel vehicles, and to comply with the European legislations on light-duty diesel vehicles. In this project, 21 diesel vehicles (including Euro 5 and Euro 6 vehicles) have been chosen for lab test and PEMS test. The result of M1 vehicles complied with Euro 5 is around 1.0-6.3 times above emission standards, and 1.4-7.4 times above emission standards for N1 vehicles, and 0.18-9.7 times above emission standards for Euro 6 vehicles. Besides, two Euro 6 vehicles were run for relativity tests in Taiwan and Germany; results show the relativity is high. Futhermore, based on the results of the study, the avaiabliliies of introduction PEMS into Taiwan will be analyzed. Suggestions will be made to evaluate the effects of various emission control strategies from light-duty diesel vehicles. Futhermore, the results of the study are similar with other fiundings by ICCT and other authorities in EU. Currently, the vehicles complied with Euro 6 in Taiwan have not complied with the updating Euro 6d, they do not have to meet the RDE standards yet. Therefore, the avaiabliliies of introduction PEMS into Taiwan like the exact value of conformity factors (CF) and the time frame for introduction CF needs to be analyzed. In addition, suggestions will be made to evaluate the effect and to strength various emission control strategies from light-duty diesel vehicles in Taiwan.

Portable Emissions Measurement System、Real Driving Emissions、Conformity Factors