Accuracy of exhaust emission factor measurements on chassis dynamometer.
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.
Joumard
Robert
R
Laboratory of Transport and Environment, French National Institute for Transport and Safety Research, Bron, France. joumard@inrets.fr
Laurikko
Juhani
J
Le Han
Tuan
T
Geivanidis
Savas
S
Samaras
Zissis
Z
Merétei
Tamás
T
Devaux
Philippe
P
André
Jean-Marc
JM
Cornelis
Erwin
E
Lacour
Stéphanie
S
Prati
Maria Vittoria
MV
Vermeulen
Robin
R
Zallinger
Michael
M
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*
D000393:Air Pollutants; D005742:Gasoline; D014677:Pharmaceutical Vehicles; D001335:Vehicle Emissions