This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Engine Performance and Exhaust Gas Characteristics of a Compression Ignition Engine Operated with DME Blended Gas Oil Fuel
Annotation ability available
Sector:
Language:
English
Abstract
Dimethyl Ether (DME) is a promising new alternative fuel for compression ignition DI engines. However, some problems arise from the poor lubricity of DME. Breakdown of the film bearing between needle and sleeve of the injector can lead to mechanical wear and leakage, a problem that is not mitigated easily. For example, the application of returning the leakage to fuel tank could raise a back pressure on the injection needle. This pressure can affect injection rate and consequently engine performance.
In this study, fuels based on various DME to gas oil (diesel fuel) ratios were investigated, in part. Physical and chemical properties of DME and gas oil are shown to lead to mutual solubility at any ratio. Blended fuels have a higher lubricity compared with pure’ DME and a better injection spray compared with pure gas oil.
Blends including zero weight percent DME (neat gas oil operation), and nominal blend percentages of 2.5, 5, 10, 20, 40, 60, 80 and straight DME were evaluated in a single cylinder research test engine. Performance, emissions and other features of blended fuel operation yielded the following results:
By taking relative advantages of DME and gas oil, the DME blended gas oil achieved satisfactory properties in lubricity and atomization, which contributed to improvements in leakage and spray characteristics.
Engine performances were found to be comparable among the test fuels which contains a proportion of DME of up to about 10%.
As much as 30% soot emission reductions could be achieved with about 10% DME blended fuel operation, however, no significant reductions in and unburned hydrocarbon emissions were observed.
Recommended Content
Authors
Topic
Citation
Chen, Z., Kajitani, S., Minegisi, K., and Oguma, M., "Engine Performance and Exhaust Gas Characteristics of a Compression Ignition Engine Operated with DME Blended Gas Oil Fuel," SAE Technical Paper 982538, 1998, https://doi.org/10.4271/982538.Also In
References
- Hansen John Bogild Voss Bodil Joensen Finn Siguroardottir Inga Dora “A Large Scale Manufactured of Dimethyl Ether- A new Alternative Diesel Fuel From natural Gas” SAE Paper 950063 1995
- Sorenson S.C. Mikkelsen Svend-Erik “Performance and Emissions of a 0.273 Litter Direct Injection Diesel Engine Fuelled with Neat [ILLEGIBLE] Ether” SAE Paper 950064 1995
- Fleish Theo McCarthy Chris Basu Arun Udovich Carl Charvonneau Pat Slodowske Warren Mikkelsen Svend-Erik McCandless Jim A New Clean Diesel Technology: Demonstration of ULEV Emissions on a 1994 Model Diesel Engine Using Dimethyl Ether” SAE Paper 950061 1995
- Kajitani S. Chen Z. L. Konno M. Rhee KT “Engine Performance and Exhaust Characteristics of Direct-injection Diesel Engine Operated with DME” SAP Paper 972973 1997
- Chen Zhili Konno Mitsuru Kajitani Shuichi “Performance and Emissions of DI Compression Ignition Engines Fueled with Dimethyl Ether Report: Performance and Emission in Retrofitted Engines” Proceedings of The 14th Internal Combustion Engine Symposium Japan 235 240 1997
- Holldorff H. Kanpp H. “Vapor Pressure of [ILLEGIBLE] Butane, Dimethyl Ether, Methyl Chloride, Methanol and Vapor-Liquid Equilibrium of Dimethyl [ILLEGIBLE] Methanol” Fluid Phase Equilibria 40 113 1988
- List H. 1939