At the Transport and Air Pollution Conference 2005 the improvement and application of the PHEM instantaneous emission model for passenger cars and light duty vehicles was presented. Instantaneous emission measurements from chassis dynamometers were used to create engine maps for the passenger car fleet, including gasoline and diesel vehicles EURO 0 to EURO 4. Measurements were collected from the TUG chassis dynamometer with the evaluation of the tests conducted automatically. Engine emission maps could not be created for particulate mass, as only three values were available for each CADC (Common Artemis Driving Cycle) test that populate the model. Particulate mass was originally linked to HC-emissions. This method has been improved, with instantaneous particulate matter emissions linked to a transient particle number signal that has been recorded for every test. A comparison of simulation results and measurements is provided for EURO 3 and EURO 4 vehicles. It is possible to link PHEM with traffic microsimulation tools, such as AIMSUN or VISSIM, and subsequently dispersion models (e.g. GRAL and MISKAM). One application of PHEM linked with the traffic microsimulation AIMSUN is also presented in this paper. The combined traffic and emission modelling framework was used to predict the influence of a 'Low Emission Zone', which excludes EURO 0 to EURO 2 diesel passenger cars from entering a controlled area. The traffic flow profiles were simulated by AIMSUN and then the emissions calculated by PHEM.
An instantaneous emission model for the passenger car fleet
2008
12 Seiten, 9 Bilder, 3 Tabellen, 14 Quellen
Conference paper
English
Improving an instantaneous emission model for passenger cars
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