Lista zgłoszonych artykułów

Growing concerns over worldwide ecological security have intensified efforts to reduce emissions from internal combustion engines. Although advanced combustion strategies and novel after-treatment systems offer effective solutions for emission reduction, their implementation is often hindered by economic feasibility and technical complexity, making them less viable for older internal combustion engine designs. An alternative approach involves the use of alternative fuels in dual-fuel mode, which presents a more practical and affordable solution for lowering emissions in these types of engines. The main purpose of this study is to investigate the combustion and emission characteristics of a dual-fuel diesel engine operated with diesel as the primary fuel and liquefied petroleum gas (LPG) as a premixed, port-injected secondary fuel. Experimental tests were performed under two conditions: with and without Exhaust Gas Recirculation (EGR) system. For each condition, multiple speed/load scenarios were evaluated on a four-cylinder diesel engine (AJM 1.9 TDI PD) at various diesel to LPG substitution ratio. Key words: dual-fuel diesel engine, LPG premixed ratio, internal combustion engine, combustion, emission reduction, alternative fuels