Ensaios dinamométricos de um motor de combustão interna em regime sobrealimentado operando com hidrogênio

Abstract

The increasing use of fossil fuels to meet energy demand in recent decades has led to many problems regarding green house gases and pollutant emissions. As a result, government programs such as Rota 2030 encourage the use of renewable fuels to reduce the emissions generated by internal combustion engines. Hydrogen emerges as a potential source of sustainable, clean energy fuel, which may emit no green house gases nor pollutant emissions from its combustion. The aim of this work is to analyze the performance of a Ricardo Proteus single-cylinder spark-ignition engine with a displacement of 1172.6 cm³ at supercharged condition using hydrogen as fuel. The engine was operated at speed of 1500 rpm, with excess air ratios of λ = 1.8, λ = 2.6 and λ = 3.0. Under different load conditions of 3 bar, 6 bar and 9 bar IMEP. The results indicate the need for a mechanical compressor to achieve higher operating loads with poor mixtures. For poorer mixtures such as λ = 3.0, almost zero NOx emissions were obtained. In conclusion, it is possible to operate a spark ignition engine with hydrogen at medium loads efficiently and without generating NOx.