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http://dx.doi.org/10.7467/KSAE.2014.22.2.182

Dynamic Decoupler Design for EGR and VGT Systems in Passenger Car Diesel Engines  

Hong, Seungwoo (Department of Automotive Engineering, Graduate School, Hanyang University)
Park, Inseok (Automotive Control and Electronics Laboratory, Hanyang University)
Sohn, Jeongwon (Department of Automotive Engineering, Graduate School, Hanyang University)
Sunwoo, Myoungho (Department of Automotive Engineering, Hanyang University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.22, no.2, 2014 , pp. 182-189 More about this Journal
Abstract
This paper proposes a decoupler design method to reduce interaction between exhaust gas recirculation (EGR) and variable geometry turbocharger (VGT) systems in passenger car diesel engines. The EGR valve and VGT vane are respectively used to control air-to-fuel ratio (AFR) of exhaust gas and intake pressure. A plant model for EGR and VGT systems is defined by a first order transfer function plus time-delay model, and the loop interaction between these systems is analyzed using a relative normalized gain array (RNGA) method. In order to deal with the loop interaction, a design method for simplified decoupler is applied to this study. Feedback control algorithms for AFR and intake pressure are composed of a compensator using PID control method and a prefilter. The proposed decoupler is evaluated through engine experiment, and the results successfully showed that the loop interaction between EGR and VGT systems can be reduced by using the proposed decoupler. Furthermore, it presents stable performance even off from the designed operating point.
Keywords
Diesel engine; Decoupler; Air-to-fuel ratio control; Intake pressure control; Exhaust gas recirculation;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 C. Rajapandiyan and M. Chidambaram, "Controller Design for MIMO Processes Based on Simple Decoupled Equivalent Transfer Functions and Simplified Decoupler," Industrial & Engineering Chemistry Research, Vol.51, No.38, pp.12398-12410, 2012.   DOI
2 M. Durnholz, G. Eifler and H. Endres, "Exhaust-gas Recirculation - A Measure to Reduce Exhaust Emission of DI Diesel Engines," SAE 920725, 1992.
3 M. Van Nieuwstadt, I. Kolmanovsky, P. Moraal, A. Stefanopoulou and M. Jankovic, "Experimental Comparison of EGR-VGT Control Schemes for a High Speed Diesel Engine," Control System Magazine, Vol.20, No.3, pp.63-79, 2000.   DOI
4 J. Wahlstrom, Control of EGR and VGT for Emission Control and Pumping Work Minimization in Diesel Engines, Ph. D. Dissertation, Linkoping University, Linkoping, 2006.
5 Y. Yoon, S. Choi, M. Ko and J. Lim, "Simplified Turbocharged Diesel Engine Air Path Modeling and Control Using Sliding Mode Controllers," KSAE Annual Conference Proceedings, pp.548-558, 2010.
6 V. L. Utkin, C. Hao-Chi, I. Kolmanovsky and J. A. Cook, "Sliding Mode Control for Variable Geometry Turbocharged Diesel Engines," American Control Conference, pp.584-588, 2000.
7 B. Oh, Coordinated Control of Diesel Engine Air System Using Artificial Neural Network, Ph. D. Dissertation, Hanyang University, Seoul, 2011.
8 Q.-G. Wang, B. Huang and X. Guo, "Autotuning of TITO Decoupling Controllers from Step Tests," ISA Transactions, Vol.39, No.4, pp.407-418, 2000.   DOI
9 L. Eriksson, J. Wahlstrom and M. Klein, "Physical Modeling of Turbocharged Engines and Parameter Identification," Lecture Notes in Control and Information Sciences, Vol.402, pp.53-71, 2010.
10 E. Alfieri, A. Amstutz, C. H. Onder and L. Guzzella, "Model-based Feedback Control of the Air-to-fuel Ratio in Diesel Engines Based on an Empirical Model," IEEE Conference on Control Applications, pp.509-514, 2007.
11 M.-J. He, W.-J. Cai, W. Ni and L.-H. Xie, "RNGA Based Control System Configuration for Multivariable Processes," Journal of Process Control, Vol.19, No.6, pp.1036-1042, 2009.   DOI
12 E. Gagnon, A. Pomerleau and A. Desbiens, "Simplified, Ideal or Inverted Decoupling?," ISA Transactions, Vol.37, No.4, pp.265-276, 1998.   DOI
13 I. Park, W. Lee and M. Sunwoo, "Application Software Modeling and Integration Methodology using AUTOSAR-ready Light Software Architecture," Transactions of KSAE, Vol.20, No.6, pp.117-125, 2012.   과학기술학회마을   DOI   ScienceOn
14 C. H. Houpis, "Refined Design Method for Sampled-data Control Systems: The Pseudocontinuous-time (PCT) Control System Design," Control Theory and Applications, IEEE Proceedings D, Vol.132, No.2, pp.69-74, 1985.   DOI
15 C. H. Houpis, S. J. Rasmussen and M. Garcia-Sanz, Quantitative Feedback Theory: Fundamentals and Applications, 2nd Edn., CRC Press, USA, 2006.
16 I. Park, S. Hong, J. Shin and M. Sunwoo, "Robust Air-to-fuel Ratio Control Algorithm of Passenger Car Diesel Engines Using Quantitative Feedback Theory," Transactions of KSAE, Vol.21, No.3, pp.88-97, 2013.   과학기술학회마을   DOI
17 K. Lee, I. Park, M. Sunwoo and W. Lee, "AUTOSAR-ready Light Software Architecture for Automotive Embedded Control Systems," Transactions of KSAE, Vol.21, No.1, pp.68-77, 2013.   과학기술학회마을   DOI   ScienceOn
18 P. A. Perez and D. A. Sala, Multivariable Control Systems: An Engineering Approach, Springer, 2004.