This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Can the Best Fuel Economy of Today's Engines Still Be Improved?
Annotation ability available
Sector:
Language:
English
Abstract
Direct injection into open chambers of Diesel- and S.I.- Engines is considered by the experts of automotive engineering worldwide as the best way for future economy and ecology engines [1]. Beside of the best fuel saving passenger cars driven by Diesel engines, advanced Diesel like Stratified Charge Engines as the CCSC (Controlled Combustion Stratified Charge) and the MESC (Mixture Exhaust Stratified Charge) -Engines open the way for future developments. Both engines work with the following new elements:
- Air assisted injection for the formation of the combustible mixture in the small cavities of prechambers, where the load control is achieved by the quantity of the injected fuel without the need of throttling the charge of the main chamber as common in today's SI engines.
- Pulsed Jet Combustion, where at first in small cavities of prechambers a rich mixture gets ignited. Afterwards pulsed jets of burning gases, at least two jets moving in opposite directions, impinge each other in the middle of the cylinder, where after a sudden multipoint ignition a fireball-combustion of lean mixture takes place, surrounded by a layer of inert gases close to the cylinder wall.
- Stratification of residual gas, in order to reach an isolation of the burning lean mixture to avoid heat losses and flame quenching at the wall. In this procedure only that amount of formerly burnt residual gas gets discharged from the cylinder, which equals the amount of the newly formed burnt gas coming from the fireball.
In a cooperative investigation at the Technical University Poznan and the Institut für Fahrzeugbau in Wolfsburg, sponsored by the Volkswagen Foundation, theoretical and experimental results showed the successful application of the MESC-principle on reciprocating engines.
Recommended Content
Authors
Topic
Citation
Heitland, H., Rinne, G., and Wislocki, K., "Can the Best Fuel Economy of Today's Engines Still Be Improved?," SAE Technical Paper 981912, 1998, https://doi.org/10.4271/981912.Also In
References
- Beck N.J. Chen S.K. Oppenheim A.K. Uyehara O. On the Future on Combustion in Piston Engines SAE Congress 1997 Detroit 1998
- Fraidl G.K. Kapus P. Piok W. Wirth M. 1997
- Rößner D. 1997
- Schmidt F.A.F. Springer-Verlag Berlin 1967
- Pischinger R. et al Springer-Verlag Wien 1990
- Haugen D.J. et al Direct Injection SI Engine SAE SP-1314 Detroit 1998
- Reitz R. et al Diesel Fuel Injection and Sprays SAE SP-1316 Detroit 1998
- Yamaguchi J. Automotive Engineering Detroit Nov. 96
- Fraidl G.K. Knoll R. Hazeu H.P. 1993
- Oppenheim A.K. et al Refinement of Heat Release Analysis SAE Paper 970538 Detroit 1997
- Hauser G. Heitland H. Wislocki W. Can the No Man's Land between Diesel- and Otto- Engines be brigded? SAE-Future Transportation Technology Conference Costa Mesa 1995
- Wislocki K. Kozak W. 1997
- Heitland H. Wislocki K. 1993
- Heitland H. Wislocki K. Process and Device for a Two-Stroke Combustion Engine 1993
- Möser C.M. 1995
- Han S. Cheng W.K. Spark Ignition Engine Operation in a Stratified-EGR-Mode SAE paper 980122 Detroit 1998
- Spiegel L. Haug M. Meyer J. Andrian S.v. Stratification of Exhaust Gas in SI-Engines Stuttgart 1996
- Heitland H. Rinne G. Wislocki K. New Ecology Engines -A Result of the Zeldovich Mechanism Zeldovich-Memorial Moskow 1994
- Heitland H. Kozak W. Wislocki K. Research in Application of Air-Assisted Fuel Injection in Two-Stroke Engine KONES'96 Zakopane 1996
- Murase E. Ono S. Hanada K. Oppenheim A.K. Pulsed Combustion Jet Ignition in Lean Mixtures SAE Pap. 942048 Detroit 1994
- Heitland H. Rinne G. Wislocki K. 1994
- Heitland H. Wislocki K. After 2000 - An ecological car of 1 liter/100 km fuel-consumption seems to be possible KONES 94 Lublin 1994
- Heitland H. Rinne G. Wislocki K. The fulfilment of future enviromental regulations and the use of alternative fuels seems to be possible by a new 2-stroke stratified charge engine 3rd APISCEU Hong-Kong 1995
- Heitland H. Rinne G. Wislocki K. Advanced Stratified Charge Combustion in Two- and Four Stroke Rotary Engines 4th APISCEU Bangkok 1997
- Oppenheim A.K. et al Proceedings of the 16 th ICDERS Conference Krakow 1997