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Duty Cycle Operation as a Possibility to Enhance the Fuel Economy of an SI Engine at Part Load
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English
Abstract
The potential of Duty Cycle Operation (DCO) of a Spark Ignited (SI) engine on part load has been investigated. DCO keeps an engine running at full throttle in a stop and go mode to speed up a flywheel as a short time energy storage device. So the actual power demand is covered by the flywheel instead of the convenient direct power transfer from the engine. This work includes the calculation of the theoretical potential and preliminary results of a test setup.
The results show a clear advantage of fuel consumption at the engine's low power output. The potential of DCO has proved to be higher than that of variable intake valve timing.
Authors
Citation
Ender, M. and Dietrich, P., "Duty Cycle Operation as a Possibility to Enhance the Fuel Economy of an SI Engine at Part Load," SAE Technical Paper 960229, 1996, https://doi.org/10.4271/960229.Also In
References
- Dietrich P. Hörler H.U. Eberle M.K ‘The ETH-Hybrid III - a concept to minimize consumption and to reduce emissions’ 26th ISATA-Conference Aachen
- Schulz-Grunow F. 1935
- Daily J.W. Nece R.E. ‘Chamber dimension effects of induced flow and frictional resistance of enclosed rotating discs’ Journal of basic engineering, Trans. ASME March 1960
- Traupel W. Thermische Turbomaschinen I Springer Heidelberg, D 1977
- Sigloch H. Technische Fluidmechanik Schroedel Hannover, D 1980
- Hütte Physikhütte Ernst & Sohn Berlin, D 1971
- Pantell K.
- Watabe K. ‘On fluid resistance of enclosed rotating rough discs’ Bulletin of JSME 8 29 1965
- Taylor G.I. ‘Fluid Friction between Rotating Cylinders’ Proceedings of the Royal Society A 157, GB 1936
- 1969
- Bjorklund I.S. ‘Heat transfer from rotating bodies - single cylinders and concentric cylinders’ Technical Report No. 34 Dep. of Mechanical Engineering, Stanford University California, USA Dec. 31 1957
- Eberle M.K. Energetische und ökologische Aspekte des Individualverkehrs 1995
- Miculic L. et al. Düsseldorf, Germany 1992
- Urata Y. et al. ‘A Study of Vehicle Equipped with Non-Throttling S.I. Engine with Early Intake Valve Closing Mechanism’ SAE SP-956 Warrendale, USA 1993