Measurements of particulate emissions from Euro 5/6 passenger cars in different drive settings

Abstract

The article presents the particulate emission measurements of passenger cars that meet the latest emission norms, the development of which has so far been dictated by requirements of downsizing. The comparison was made based on the selected vehicles equipped with spark-ignition engines, which are an example of reducing the displacement volume while maintaining the operational parameters of the drive units. Particle emissions were measured during tests in real traffic conditions. The change in the vehicle's emission category caused an increase in requirements regarding emitted particles number from these engines. As a result, the introduction of particulate filters into exhaust after-treatment systems of gasoline engines (so far only three-way catalytic converters have been used) became necessary. Comparisons of the mass and particles number and their dimensional distribution for vehicles of different ecological classes, and also engines before and after downsizing were the basis for making conclusions about the direction of changes in traditional propulsion units in modern vehicles.