LTH-image

KCFP, Closed-Loop Combustion Control

Researchers: Rolf Johansson and Anders Widd in cooperation with Patrick Borgqvist, Assoc. Prof. Per Tunestål and Prof. Bengt Johansson, Div. Combustion Engines, Lund University.

 

Competence Center Combustion Processes (KCFP) at Lund University focuses on research of combustion processes between HCCI (Homogeneous Charge Compression Ignition) and classical Otto and Diesel engines.

Project aims:

  • Reducing emissions, improving efficiency and repeatability of HCCI and partially pre-mixed combustion (PPC) using closed-loop control;
  • Control-oriented modeling and simulation of combustion processes;
  • Model-based control and optimization evaluated on test beds.


Within the project a cycle-resolved physics-based HCCI model has been developed. The model includes a low-complexity model of the cylinder wall temperature dynamics in order to capture the relevant time-scales of transient HCCI when only small amounts of hot residuals are trapped in the cylinder. The temperature evolution of the gas charge is modeled as isentropic compression and expansion with three heat transfer events during each cycle.

Model predictive controllers based on linearizations of the model have been designed and evaluated experimentally. The considered control signals were the inlet valve closing and the intake temperature. The control performance was evaluated in terms of response time to set-point changes and the resulting output variance. The benefits of using hybrid models comprised of several linearizations of a nonlinear model have also been investigated.

During 2011, a continuous-time model of partially premixed combustion was developed and implemented in the Modelica language. The JModelica.org framework was used to formulate optimization problems on the resulting model. One use of this possibility is automatic calibration of the model parameters.

Publications

 

Anders Widd, Hsien-Hsin Liao, J. Christian Gerdes, Per Tunestål, Rolf Johansson: "Hybrid Model Predictive Control of Exhaust Recompression HCCI". Asian Journal of Control, 16:2, pp. 370–381,2014.

Anders Widd, Per Tunestål, Johan Åkesson, Rolf Johansson: "Single-Zone Diesel PPC Modeling for Control". In 2012 American Control Conference, Montréal, Canada, June 2012.

Anders Widd, Kent Ekholm, Per Tunestål, Rolf Johansson: "Physics-Based Model Predictive Control of HCCI Combustion Phasing Using Fast Thermal Management and VVA". IEEE Transactions on Control Systems Technology, 20:3, pp. 688–699, April 2012.

Nikhil Ravi, Hsien-Hsin Liao, Adam F. Jungkunz, Anders Widd, J. Christian Gerdes: "Model predictive control of HCCI using variable valve actuation and fuel injection". Control Engineering Practice, 20:4, pp. 421–430, April 2012.

Anders Widd, Per Tunestål, Rolf Johansson: "Modeling for HCCI Control". In D. Alberer, H. Hjalmarsson, L. del Re (Eds.) (Eds.): Identification for Automotive Systems, Springer, London, 2012.

Anders Widd, Patrick Borgqvist, Per Tunestål, Rolf Johansson, Bengt Johansson: "Investigating Mode Switch from SI to HCCI using Early Intake Valve Closing and Negative Valve Overlap". In 2011 JSAE/SAE International Powertrains, Fuel & Lubricants, , August 2011.

Anders Widd, Hsien-Hsin Liao, J. Christian Gerdes, Per Tunestål, Rolf Johansson: "Control of Exhaust Recompression HCCI using Hybrid Model Predictive Control". In 2011 American Control Conference, San Francisco, California, USA, June 2011.

Hsien-Hsin Liao, Nikhil Ravi, Adam Jungkunz, Anders Widd, J. Christian Gerdes: "Controlling Combustion Phasing of Recompression HCCI with a Switching Controller". In Proc. Sixth IFAC Symposium on Advances in Automotive Control, Germany, July 2010.

Rolf Johansson, Per Tunestål, Anders Widd: "Modeling and Model-based Control of Homogeneous Charge Compression Ignition (HCCI) Engine Dynamics". In L. del Re, F. Allgöwer, L. Glielmo, C. Guardiola, I. Kolmanovsky (Eds.) (Eds.): Automotive Model Predictive Control---Models, Methods and Applications, Springer-Verlag, Berlin-Heidelberg, May 2010.

Carl Wilhelmsson, Per Tunestål, Anders Widd, Rolf Johansson: "A Fast Physical NOx Model Implemented on an Embedded System". In IFAC Workshop on Engine and Powertrain Control, Simulation and Modeling (ECoSM 2009) , Malmaison, Rueil, France, November 2009.

Anders Widd, Kent Ekholm, Per Tunestål, Rolf Johansson: "Experimental Evaluation of Predictive Combustion Phasing Control in an HCCI Engine using Fast Thermal Management and VVA". In 2009 IEEE Multi-Conference on Systems and Control, Saint Petersburg, Russia, July 2009.

Anders Widd: "Predictive Control of HCCI Engines using Physical Models". Licentiate Thesis ISRN LUTFD2/TFRT--3246--SE, Department of Automatic Control, Lund University, Sweden, May 2009.

Carl Wilhelmsson, Per Tunestål, Bengt Johansson, Anders Widd, Rolf Johansson: "A Physical Two-Zone NOx Model Intended for Embedded Implementation". In SAE Technical Papers 2009-01-1509, SAE World Congress & Exhibition, April 2009, Detroit, MI, USA, April 2009.

Kent Ekholm, Maria Karlsson, Per Tunestål, Rolf Johansson, Bengt Johansson, Petter Strandh: "Ethanol-Diesel Fumigation in a Multi-Cylinder Engine". SAE International Journal of Fuels and Lubricants, 1:1, pp. 26–36, April 2009.

Luca Benvenuti, Andrea Balluchi, Alberto Bemporad, S. Di Cairano, Bengt Johansson, Rolf Johansson, Alberto Sangiovanni-Vincentelli, Per Tunestål: "Chapter 15: Automotive Control". In (Eds.): Handbook of Hybrid Systems Control: Theory, Tools, Applications. In J. Lunze, F. Lamnabhi-Lagarrigue (Eds.), Cambridge University Press, Cambridge, 2009.

Anders Widd, Per Tunestål, Rolf Johansson: "Physical Modeling and Control of Homogeneous Charge Compression Ignition (HCCI) Engines". In Proc. 47th IEEE Conference on Decision and Control, Cancun, Mexico, December 2008.

Anders Widd, Per Tunestål, Carl Wilhelmsson, Rolf Johansson: "Control-Oriented Modeling of Homogeneous Charge Compression Ignition incorporating Cylinder Wall Temperature Dynamics". In Proc. 9th International Symposium on Advanced Vehicle Control, Kobe, Japan, October 2008.

Daniel Blom, Maria Karlsson, Kent Ekholm, Per Tunestål, Rolf Johansson: "HCCI Engine Modeling and Control Using Conservation Principles". In SAE World Congress, SAE Technical Paper 2008-01-0789, Detroit, MI, April 2008.

Rolf Johansson: "Subspace-Based Continuous-Time Identification". In (Eds.): Identification of Continuous-time Models from Sampled Data, Springer-Verlag, London, March 2008.

Rolf Johansson: "Continuous-Time Model Identification Using Spectrum Analysis with Passivity-Preserving Model Reduction". In (Eds.): Identification of Continuous-time Models from Sampled Data, Springer-Verlag, London, March 2008.

Johan Bengtsson, Petter Strandh, Rolf Johansson, Per Tunestål, Bengt Johansson: "Hybrid Modelling of Homogeneous Charge Compression Ignition (HCCI) Engine Dynamic—A Survey". International Journal of Control, 80:11, pp. 1814–1848, November 2007.

Rolf Johansson, Anders Rantzer: "Editorial—Hybrid Systems in Automotive Control". International Journal of Control, 80:11, pp. 1699–1700, November 2007.

Johan Bengtsson, Petter Strandh, Rolf Johansson, Per Tunestål, Bengt Johansson: "Model Predictive Control of Homogeneous Charge Compression Ignition (HCCI) Engine Dynamics". In 2006 IEEE International Conference on Control Applications, Munich, Germany, October 2006.

Petter Strandh, Johan Bengtsson, Rolf Johansson, Per Tunestål, Bengt Johansson: "Variable Valve Actuation for Timing Control of a Homogeneous Charge Compression Ignition Engine". In SAE Paper 2005-01-0147, March 2005.

 


2013-03-21