Abstract
Abstract Twenty-five passenger cars (10 conventional petrol engined cars, 10 vehicles equipped with a 3-way catalyst and 5 diesel engined vehicles) were tested on a chassis dynamometer. Exhaust gases were collected in a Constant Volume Sampling system using Teflon filter and XAD2 adsorber. Identification and quantification of PAHs were carried out by high resolution Shpol'skii spectrofluorometry over two INRETS cycles (urban and road cycles) representative of real – world driving conditions under hot or cold start. The results obtained in μg per km exhibit for the three technologies: - the influence of average speed - the efficiency of catalyst, under hot and cold start - higher emissions by conventional petrol engined cars, particularly under cold start and low speed conditions.
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