This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Cylinder Pressure Based Cylinder Charge Estimation in Diesel Engines with Dual Independent Variable Valve Timing
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 03, 2018 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
With stricter emission legislations and demands on low fuel consumption, new engine technologies are continuously investigated. At the same time the accuracy in the over all engine control and diagnosis and hence also the required estimation accuracy is tightened. Central for the internal combustion control is the trapped cylinder charge and composition
Traditionally cylinder charge is estimated using mean intake manifold pressure and engine speed in a two dimensional lookup table. With the introduction of variable valve timing, two additional degrees of freedom are introduced that makes this approach very time consuming and therefore expensive. Especially if the cam phasers are given large enough authority to offer powerful thermal management possibilities.
The paper presents a physical model for estimating in-cylinder trapped mass and residual gas fraction utilizing cylinder pressure measurements, and intake and exhaust valve lift profiles. The cylinder pressure at intake and exhaust valve opening and closing together with manifold pressures and temperatures are combined with thermodynamic and heat transfer models to calculate the trapped cylinder mass. The estimator is validated on test data from a prototype engine with dual independent cam phasers under a wide range of operating conditions, including large variations in valve timing ranging from scavenging to early exhaust cam timing for thermal management.
The main contribution is the developed model, with the ability to accurately estimate the trapped cylinder charge during large independent variations in both intake and exhaust valve timing.
CitationThomasson, A., Nikkar, S., and Höckerdal, E., "Cylinder Pressure Based Cylinder Charge Estimation in Diesel Engines with Dual Independent Variable Valve Timing," SAE Technical Paper 2018-01-0862, 2018, https://doi.org/10.4271/2018-01-0862.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
- Eriksson, L. and Thomasson, A., “Cylinder State Estimation from Measured Cylinder Pressure Traces - A Survey,” Proceedings of the IFAC World Congress, Toulouse, 2017.
- Akimoto, A., Itoh, H., and Suzuki, H., “Development of Delta P Method to Optimize Transient A/F-Behavior in MPI Engine,” JSAE Review 100(4):895550, 1989.
- Hart, M., Ziegler, M., and Loffeld, O., “Adaptive Estimation of Cylinder Air Mass Using the Combustion Pressure,” SAE Technical Paper 980791 , 1998, doi:10.4271/980791.
- Worm, J., “The Effect of Exhaust Variable Cam Phaser Transients on Equivalence Ratio Control in an SI 4 Stroke Engine,” SAE Technical Paper 2005-01-0763 , 2005, doi:10.4271/2005-01-0763.
- Desantes, J.M., Galindo, J., Guardiola, C., and Dolz, V., “Air Mass Flow Estimation in Turbocharged Diesel Engines from in-Cylinder Pressure Measurement,” Experimental Thermal and Fluid Science 34(1):37-47, 2010.
- Arsie, I., Di Leo, R., Pianese, C., and De Cesare, M., “Estimation of in-Cylinder Mass and AFR by Cylinder Pressure Measurement in Automotive Diesel Engines,” Proceedings of the IFAC World Congress, Aug 2014.
- Giansetti, P. and Higelin, P., “Residual Gas Fraction Measurement and Estimation in Spark Ignition Engine,” SAE Technical Paper 2007-01-1900 , 2007, doi:10.4271/2007-01-1900.
- Colin, G., Giansetti, P., Chamaillard, Y., and Higelin, P., “In-Cylinder Mass Estimation Using Cylinder Pressure,” SAE Technical Paper 2007-24-0049 , 2007, doi:10.4271/2007-24-0049.
- Mladek, M. and Onder, C.H., “A Model for the Estimation of Inducted Air Mass and the Residual Gas Fraction Using Cylinder Pressure Measurements,” SAE Technical Paper 2000-01-0958 , 2000, doi:10.4271/2000-01-0958.
- Gatowski, J.A., Balles, E.N., Chun, K.M., Nelson, F.E. et al. , “Heat Release Analysis of Engine Pressure Data,” SAE Technical Paper 841359 , 1984, doi:10.4271/841359.
- Klein, M. and Eriksson, L., “A Specific Heat Ratio Model for Single-Zone Heat Release Models,” SAE Technical Paper 2004-01-1464 , 2004, doi:10.4271/2004-01-1464.
- Eriksson, L. and Sivertsson, M., “Computing Optimal Heat Release Rates in Combustion Engines,” SAE Int. J. Engines 80(2):1069-1079, 2015, doi:10.4271/2015-01- 0882.
- Woschni, G., “A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficiant in the Internal Combustion Engine,” SAE Technical Paper 670931 , 1967, doi:10.4271/670931.