THE EFFECT OF BIOFUELS ON EMISSIONS OF INTERNAL COMBUSTION ENGINES

The dissertation thesis pays attention to emissions of internal combustion engines and their dependence on used fuel. The aim of thesis is to determine emission productions dependence on used fuel. The main attention is paid to the production of particulate matters, their classification and concentration. Primarily mixed fuels were used i.e. there was standardised fuel mixed with selected biofuel. Secondarily pure biofuels were used. The carried out measurements used an engine with direct fuel injection as a representative of the SI engines. The other measurements of CI engines used engine with common rail. Standard components of exhaust gas were measured by FTIR and NDIR analysers. Concentration and classification of particulate matters was analysed by the usage of the TSI EEPS analyser. The performed experiments proved that biofuels blended with alcohol base materials (ethanol, n-butanol, iso-butanol) will reduce the concentration of particular matters at high engine loads. This trend wasnt confirmed at engines low loads