AN EXPERIMENTAL ANALYSIS OF INTERNAL COMBUSTION ENGINES BY ULTRA - LEAN FUEL INJECTION OPENING PRESSURES WITH VARIOUS BLENDS OF HYDROGEN

This paper aims to present the combustion, performance and emission analysis of dual fuel operated internal combustion engine experimentally. With higher rate of depletion of the conventional fossil fuels, the quest for an appropriate alternative fuel has gathered great attention in past three decades. As the world finds itself in the midst of universal energy shortage and alarmi ng rate of environmental issues, compounded a parallel need of reducing pollutants along with energy generation. Hydrogen energy is an abundant energy source and its working methodology should address this problem to some extent. Though internal combustion engines are the most trusted power sources in the transportation sector, due to stringent emission norms and rapid depletion of petroleum resources there has been a continuous effort to use alternative fuels. The engine was operated under dual fuel mode a t constant speed of 1500 rpm. During starting of experiment, engine run with pure diesel mode and once the engine reaches to the rated speed enrichment fuel is inducted in the mixing chamber. The enrichment used with varying the blend percentage 10%, 20% b y mass of fuel. Operating the engine at variable load at an Ultra - Lean fuel injection opening pressures of 220 bar (optimum pressure) at compression ratio of 17.5