title: Accuracy of exhaust emission factor measurements on chassis dynamometer.
abstract: To improve the accuracy, reliability, and representativeness of emission factors, 10 European laboratories worked together to study the influence of 20 parameters on the measurement of light-vehicle emission factors on chassis dynamometer of 4 main categories: driving patterns, vehicle-related parameters, vehicle sampling, and laboratory-related parameters. The results are based on (1) literature synthesis, (2) approximately 2700 specific tests with 183 vehicles, and (3) the reprocessing of more than 900 tests. These tests concern the regulated atmospheric pollutants and pre-Euro to Euro 4 vehicles. Of the 20 parameters analyzed, 7 seemed to have no effect, 7 were qualitatively influential, and 6 were highly influential (gearshift strategy, vehicle mileage, ambient temperature, humidity, dilution ratio, and driving cycle). The first four of the six were able to have correction factors developed for them. The results allow for the design of recommendations or guidelines for the emission factor measurement method.
authors: Laboratory of Transport and Environment, French National Institute for Transport and Safety Research, Bron, France. joumard@inrets.fr
authors: Robert
authors: R
authors: Joumard
authors: Juhani
authors: J
authors: Laurikko
authors: Tuan
authors: T
authors: Le Han
authors: Savas
authors: S
authors: Geivanidis
authors: Zissis
authors: Z
authors: Samaras
authors: Tamás
authors: T
authors: Merétei
authors: Philippe
authors: P
authors: Devaux
authors: Jean-Marc
authors: JM
authors: André
authors: Erwin
authors: E
authors: Cornelis
authors: Stéphanie
authors: S
authors: Lacour
authors: Maria Vittoria
authors: MV
authors: Prati
authors: Robin
authors: R
authors: Vermeulen
authors: Michael
authors: M
authors: Zallinger
mesh_terms: D000393:Air Pollutants; D000397:Air Pollution / Q000517:prevention & control; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods*; D005060:Europe; D005742:Gasoline; D018986:Motor Vehicles; D014677:Pharmaceutical Vehicles; D013997:Time Factors; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D005742:Gasoline; D014677:Pharmaceutical Vehicles; D001335:Vehicle Emissions