Analysis of Cold Start Emission from Light Duty Vehicles Fueled with Gasoline and LPG for Selected Ambient Temperatures

The exhaust emission from modern vehicles is reduced by catalysts except for cold start phase. The difference in emissions for unheated catalysts is large and can reach several times higher than the emission for the heated thermal state of the engine. In the dyno tests, the analysis of the duration and volume of the emissions for harmful exhaust components: CO₂ (carbon dioxide), CO (carbon monoxide), THC (total hydrocarbons), NO_x (nitrogen oxides) at various climatic chamber operating temperatures, i.e. 0-30^oC, for a vehicle meeting the EURO3 and EURO6 standards was performed. Stationary analyzers AVL AMA i60 were used to measure the emissions. The article presents the differences in the emissions for the cold-start phase of engine operation and the duration of time passing to a heated engine for vehicles powered by petrol and LPG (liquefied petroleum gas). The work shows the analysis of modal emissions as well as bag emission.