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Friction Reduction - the Engine's Mechanical Contribution to Saving Fuel
Technical Paper
2000-05-0160
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English
Abstract
Over the last few years, engine development has succeeded in reducing friction by up to 30 %. This corresponds to a reduction of fuel consumption in urban traffic of around 10 %, thus, making friction reduction - aside from the introduction of Otto DI engine and the transition from IDI to DI Diesel engines - an effective measure to reduce fuel consumption.
Investigations of engines and engine components show that even today's “Best in Class” engines still harbor a reduction potential of least 20 %. Possible ways to realize this potential lie in:
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Adapted dimensioning of the friction relevant engine parameters
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Lightweight design of dynamic components
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Optimized layout of the timing drive (especially in valve train designs with roller followers and chain drives)
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Optimization of the piston group (up to 50 % of the parasitic losses can occur here)
The investigations are based on detailed friction measurements of over 100 sample engines and their components. The analysis of the measured data, together with more in-depth measurements using special measurement techniques give insight into current trends and directions for new designs. With the help of benchmarking and simulation programs, the influence of individual design parameters on the friction behavior and variants can be found.
This paper is meant to highlight the often hidden role of engine mechanics in the development of fuel consumption favorable engines and compare it to the development steps of SI and Diesel engine procedures.
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Authors
- Markus Schwaderlapp - 1) FEV Motorentechnik, Neuenhofstr. 181, D52078 Aachen, Germany 2) Institute for Combustion Engines RWTH Aachen, D-52056 Aachen, Germany
- Dr.-Ing. Franz Koch - 1) FEV Motorentechnik, Neuenhofstr. 181, D52078 Aachen, Germany 2) Institute for Combustion Engines RWTH Aachen, D-52056 Aachen, Germany
- Dipl.-Ing. Jürgen Dohmen - 1) FEV Motorentechnik, Neuenhofstr. 181, D52078 Aachen, Germany 2) Institute for Combustion Engines RWTH Aachen, D-52056 Aachen, Germany
Topic
Citation
Schwaderlapp, M., Koch, D., and Dohmen, D., "Friction Reduction - the Engine's Mechanical Contribution to Saving Fuel," SAE Technical Paper 2000-05-0160, 2000.Also In
References
- Koch, F. Geiger, U. Hermsen F.-G. 1996 PIFFO - Piston Friction Force Measurements during Engine Operation SAE-Paper 960306
- Koch, F. Decker, P. Gülpen, R. Quadflieg, F.-J. Loeprecht, M. 1998 Cylinder Liner Deformation Analysis - Measurements and Calculations SAE-Congress Detroit 23-26.02.1998
- Schwaderlapp, M. Koch, F. Bollig, C. Hermsen, F.- G. Arndt, M. 2000 Lightweight Design and Friction Reduction - Design Potentials to Meet Consumption Targets Wien-Congress
- Maaβen, F. Koch, F. 1997 Schmiersystementwicklung mit dem Rechenprogramm SIMONE Tribologie-Fachtagung Göttingen 30.09./01.10.1997
- Speckens, F.-W. Hermsen, F.-G. Buck, J. 1998 Konstruktive Wege zum reibungsarmen Ventiltrieb Motortechnische Zeitschrift MTZ, März
- Schwaderlapp, M. Bick, W 1998 CAE Empowers Interdisciplinary Engine Design Global Powertrain Congress Detroit 06.-08.10.1998
- Koch, F. Haubner, F. 2000 Cooling System Development and Optimization for DI Engines SAE-Congress Detroit