Influence of hydrogen on combustion and emission formation characteristic of diesel engine

Abstract

    This paper presents the simulation results on the effects of hydrogen on combustion characteristics and emission formation of a diesel engine using AVL Boost software. The research was conducted on an agriculture diesel engine R180. Hydrogen was supplied into the intake manifold of the engine by the percentage of 5%, 10%, 20% and 30%. The results show that when adding hydrogen into the intake manifold at a reasonable rate, the combustion process improved as in cylinder pressure increased. TheSoot emissions reduced sharply but NOx emissions increased. However, if hydrogen was supplied too much, the in cylinder pressure decreased, and as a result, NOx formation rate decreased when Soot
emissions increased due to imperfect combustion process.