Combustion of Dual Fuel Type Natural Gas/Liquid Diesel Fuel in Compression Ignition Engine

The purpose of this investigation is studying the characteristics of single cylinder diesel engine Ricardo E6 performance and emissions run with natural gas and diesel in dual fuel mode.In dual fuel operation, the major part of the energy released resulted from the combustion of the gaseous fuel.In the other hand, the small amount of diesel fuel provides an ignition source.Equivalence ratios, engine speed, and injection timing effects on the brake specific fuel consumption and engine exhaust emissions were examined for natural gas-diesel fuel operation and compared with neat diesel operation.The results demonstrate that, the dual fuel engine reduced NO X emissions clearly over a wide range of operating conditions.However, under lean equivalence ratios and low loads, the exhausted CO and HC emissions were high.Also, a higher BSFC resulted when compared to those of the diesel engine.