Investigation on Differences in Engine Efficiency With Regard to Fuel Volatility and Engine Load

摘要

An HSDI diesel engine was fuelled with standard Swedish environmental class 1 diesel fuel (MK1), Soy methyl ester (B100) and n-heptane (PRF0) to study the effects of both operating conditions and fuel properties on engine performance, resulting emissions and spray characteristics. All experiments were based on single injection diesel combustion. A load sweep was carried out between 2 and 10 bar IMEP{sub}g. For B100, a loss in combustion efficiency as well as ITE was observed at low load conditions. Observed differences in exhaust emissions were related to differences in mixing properties and spray characteristics.