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Diethyl Ether (DEE) is a promising oxygenated renewable bio-base resource fuel used for diesel engines, owing to its high ignition quality. An experimental investigation has been carried out to evaluate the effects of DEE blends with diesel on the combustion, performance and emission characteristics of a direct injection diesel engine. The engine tests are carried out for 10%, 25%, 50%, 75% and 100% of the full load. In this study, 2%, 5%, 8%, 10%, 15%, 20% and 25% of DEE (by volume) are blended with diesel. Beyond 25% DEE blend, the viscosity and density of the blended fuel reduces as compared to the acceptable limits, that can further reduces the lubricity and create potential wear problems in sensitive fuel injection pump and fuel injector design. The laboratory fuel tests showed that DEE can be mixed in any proportion in diesel fuel. The blended fuel retains the desirable physical properties of diesel fuel but includes the cleaner burning capability of DEE.

Single cylinder and two cylinder diesel engines are having prevalent applications for as a source of power generation, three wheelers, agricultural machines, small house-hold applications as well as in mobile towers in India and other south Asian countries. As emission limits for these segment of engines are becoming stricter than the existing limits, it is necessary to upgrade these engines to meet the various emission limits applicable. The design features & technical characteristics of these engines are very simple and primitive, hence, it is extremely difficult and challenging to make these engines emission compliant. By using the relevant simulation tools, the task of emissionising these engines can be made simple to a greater extent. It gives a greater flexibility and ease in analyzing, designing, and operating complex engine systems.