In recent years, many measurements of emissions on chassis-dynamometers have already incorporated the online measurement of emission concentrations at the exhaust as standard, alongside the usual average values. These data collected with a high time resolution (e.g. 1 second) can be combined with the likewise modal-recorded operating condition of the vehicle (engine load) and serve as a basis for methods of calculating emission. Compared to the widely used characterization of a driving pattern by its average speed only the explicit dependene of the emission behavior on the engine load allows to take into account the level of dynamics of each driving situation individually. A reliable emission data set gives the possibility of calculating emissions for differnet real world driving conditions for many applications, it is thereby no longer necessary to carry out costly and time-consuming chassis-dynamometer tests. Generation of emission data sets takes place on chassis-dnamometers using different driving patterns. Systematic investigations should show the requirements necessary for generation of instantaneous emission matrices, and how important a reliable consideration of driving kinematics is in estimating emissions for real world driving accurately.
Estimating real world emissions from passenger cars - use and limitations of instantaneous emission data
Verfahren zur Vorausberechnung der Abgasemissionen im realen Fahrbetrieb
International Journal of Vehicle Design ; 24 , 1 ; 19-33
2000
15 Seiten, 5 Bilder, 2 Tabellen, 15 Quellen
Article (Journal)
English
Automotive engineering | 2000
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