Abstract
The paper describes the results of the experimental study of emission rates of passenger gasoline and diesel passenger cars and light commercial vehicles as a function of average speed from 5 to 50 km/h and accumulated mileage. It has been shown that the emissions of most modern vehicles with the mileage exceeding 100 000 km, regardless the initial environmental class, are quite of the same range as the emissions of vehicles without catalyst. It has been also confirmed that the highest emission rates are observed at speeds from 5 to 20 km/h, typical for traffic congestion, and the minimum emission rates are observed at speeds from 25 to 50 km/h.
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