The Effect of Pure Oxygenated Biofuels on Efficiency and Emissions in a Gasoline Optimised DISI Engine

The negative impact of transport on climate has led to incentives increase the amount renewable fuels used in internal combustion engines (ICEs). Oxygenated, liquid biofuels are promising alternatives, as they exhibit similar behaviour gasoline. In this article, effect different engine efficiency, propagation and emissions a gasoline-optimised direct injected spark ignited (DISI) were evaluated through experiments. experiments performed without any hardware modifications. investigated gasoline, four alcohols (methanol, ethanol, n-butanol iso-butanol) one ether (MTBE). All tested at two speed sweeps low mid load conditions, timing sweep conditions. oxygenated increased efficiencies, even non-knock-limited At lower loads, decrease CO, HC NOx emissions. However, decreased volatility leads due fuel impingement effects. Methanol exhibited highest efficiencies significantly burn rates compared other fuels. Gasoline lowest level PN PM N-butanol iso-butanol show levels particle