Dual fuel diesel combustion with an E85 ethanol/gasoline blend

Dual fuel diesel combustion with an E85 ethanol/gasoline blend

Type	Journal Article
Author	Teemu Sarjovaara
Author	Martti Larmi
URL	http://www.sciencedirect.com/science/article/pii/S0016236114009181
Volume	139
Pages	704-714
Publication	Fuel
Date	January 1, 2015
Abstract	Researchers employed the ethanol/gasoline blend E85 as the primary fuel in a dual-fuel combustion concept. They injected the E85 blend at low pressure into the intake manifold and ignited the mixture via a diesel fuel injection near top dead center. The research engine was based on a heavy-duty diesel engine equipped with a common-rail injection system. Only the duration of the diesel injection was modified in the diesel injection system during the tests. The other diesel injection parameters were not changed. Researchers’ objective was to study the possibilities of using the waste material-based E85 ethanol blend on dual-fuel concept as a promising future bio-fuel option. The results were promising, despite the fact thast the engine was not optimized for the combustion concept being studied and minimum modifications were done to the engine. High E85 rates by energy content were achieved, especially under medium load conditions. In all cases the E85 increased carbon-monoxide and un-burned hydrocarbon emission, but the nitrogen oxide emission decreased simultaneously in most of the cases. Smoke emissions were low in all cases, but at highest E85 rate smoke emissions further decreased to near zero value.