On-road emission measurements beyond type approval PEMS
conference paper
Exhaust emissions from internal combustion engines used in cars, trucks and various mobile machinery remain one of the most important sources of air pollution in metropolitan areas. The increasing discrepancy between legal emission limits and real-world emissions is partly due to engine design and calibration deficiencies, a manufacturing defect common to all vehicles of the same certification family, and partly due to the contribution of excess emitters, vehicles with high emission levels due to spontaneous defects and tampering. The new type-approval procedure, Real Driving Emissions (RDE) tests, are carried on the road, with portable emissions monitoring systems (PEMS) used to measure tailpipe emissions. These have been adopted in major legislations for automobiles (RDE) and heavy vehicles (PEMS ISC). Moreover, older vehicles may develop undetected malfunctions, which require emission measurements.
TNO Identifier
955461
Publisher
Institute for Internal Combustion Engines and Thermodynamics of Graz University of Technology
Source title
24th International Transport and Air Pollution Conference Webinar, 30 March - 1 April 202, Graz, Austria
Collation
6 p.
Place of publication
Graz, Austria