During recent years, many measurements on chassis-dynamometers have already
incorporated the online measurement of emission concentrations at the exha
ust as standard alongside usual average values. These modal-collected data
can be combined with the likewise modal-recorded operating condition of the
vehicle (engine load) and serve as a basis for methods of calculating emis
sions. A reliable emission data set gives the possibility of calculating em
issions for different real-world driving conditions. For many applications,
it is thus no longer necessary to carry out costly and time-consuming chas
sis-dynamometer tests. Generation of emission data sets takes place on chas
sis-dynamometers using different driving patterns. Systematic investigation
s should show whether and how differing parameters (e.g. driving patterns)
affect the accuracy of the emission calculation for real-world driving cond
itions. The report presents partial results of the 'Instantaneous Vehicle E
missions' project, which is itself part of the 'MEET' project (Methodology
for Estimating Air Pollutant Emissions from Transport). MEET is a project w
ithin the framework of the 4th European Research Framework programme.