This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Predictive Engine Part Load Modeling for the Development of a Double Variable Cam Phasing (DVCP) Strategy
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 08, 2004 by SAE International in United States
Annotation ability available
DVCP, a system with continuously adjustable intake and exhaust cam positions, was investigated in terms of residual gas content, intake manifold pressure, pumping losses and fuel economy by means of engine cycle simulation on a 16-valve 4 cylinder naturally aspirated SI engine at part load conditions. Using the simulation results a phasing strategy for part load operation with the primary emphasis on improved fuel consumption has been developed.
To verify simulation predictions subsequently, measurements were made at the test rig. It was found that cycle simulation was able to predict properly the behavior of the engine even far away from calibration point. The simulated and measured cam positions for maximum fuel economy matched. Test rig results showed that fuel economy improvement by DVCP is limited by residual gas content tolerance of the engine investigated.
CitationScharrer, O., Heinrich, C., Heinrich, M., Gebhard, P. et al., "Predictive Engine Part Load Modeling for the Development of a Double Variable Cam Phasing (DVCP) Strategy," SAE Technical Paper 2004-01-0614, 2004, https://doi.org/10.4271/2004-01-0614.
- Leone, T.G. Christenson, E.J. Stein, R.A. Comparison of variable camshaft timing strategies at part load SAE Paper 960584
- Kramer, U. Phlips, P. Phasing strategy for an engine with twin variable cam timing SAE Paper 2002-01-1101
- Duesmann, M. Salber, W. 2002
- Hagen, J. Heinen, M. Jene, H. Salber, W. Haus der Technik 2002
- Gamma Technologies Inc. User's Manual and Tutorial December 2001
- Biran, A. Breiner, M. Matlab 5 für Ingenieure Addison-Wesley 1999
- Vibe, I.I. Brennverlauf und Kreisprozess von Verbrennungsmotoren VEB Verlag Technik Berlin 1970
- Hires, S.D. Tabaczynski, R.J. Novak, J.M. The Prediction of Ignition Delay and Combustion Intervals for a Homogeneous Charge, Spark Ignition Engine SAE Paper 780232
- Blizard, N.C. Keck, J.C. Experimental and Theoretical Investigation of Turbulent Burning Model for Internal Combustion Engine SAE Paper 740191
- Morel, T. Rackmil, C.I. Keribar, R. Jennings, M.J. Model for Heat Transfer and Combustion in Spark-Ignited Engine and Its Comparision with Experiments SAE Paper 880198
- Witt, A. Analyse der thermodynamischen Verluste eines Ottomotors unter den Randbedingungen variabler Steuerzeiten Graz 1999
- Csallner, P. Eine Methode zur Vorausberechnung des Brennverlaufs von Ottomotoren bei geänderten Betriebsbedingungen München 1981
- Ghauri, A. Richardson, S.H. Nightingale, C.J.E. Variation of Both Symmetric and Asymmetric Valve Events on a 4-Valve SI Engine and the Effects on Emissions and Fuel Economy SAE Paper 2000-01-1222
- Jacquelin, F. Burk, R. Wakeman, R.J. Cam Phaser Actuation Rate Performance Impact on Fuel Consumption and NOx Emissions Over the FTP-75 Drive Cycle SAE Paper 2003-01-0023