Analysis of combustion process of spark ignition engine fuelled with buthanol – petrol mixture and a hho enriched air

Abstract

In this study, spark ignition engine fuelled with buthanol-petrol mixture and a hydrogen-enriched air was investigated. Engine combustion characteristics were investigated with different buthanol (10 % and 20 % by volume) petrol mixtures and additionally supplied oxygen and hydrogen (HHO) gas mixture (3.6 l/min) in the sucked air. HHO gas improves petrol and petrol–buthanol mixture combustion and increases indicated pressure during combustion phase. Buthanol addition decreases rate of heat release, the combustion temperature and pressure are lower which have an influence on lower nitrous oxide (NOx) emission in exhaust gases. Combustion process analysis was carried out using AVL BOOST software. Experimental research and combustion process numerical simulation showed that using balanced buthanol and hydrogen addition, optimal efficient and ecological parameters could be achieved when engine is working with optimal spark timing as it would work on petrol fuel.