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Modeling and Control of Diesel Engines Equipped with a Two-Stage Turbo-System
Technical Paper
2008-01-1018
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The two-stage turbocharging technique is an effective way to improve performance and reduce emissions in diesel engines. In this paper, we consider a diesel engine equipped with an exhaust gas recirculation (EGR) valve and two turbochargers in series. The low pressure turbine is of fixed geometry and the high pressure turbine is a variable geometry turbine (VGT). The control objective is to regulate air-to-fuel (AFR), EGR exhaust fraction and the power ratio of the two turbines by coordinated manipulation of the EGR and VGT actuators. Unlike engines with a single turbocharger, in two-staged turbocharged engines, regulation of the power ratio of the turbines is also needed in order to adequately define the equilibrium point of the engine airpath.
First, a mean value engine model (MVEM) is proposed to physically describe the air path dynamics. With rich excitation of the controls in the MVEM, we identify several linear models for different areas of the engine speed-torque envelope. Local Linear Quadratic Gaussian (LQG) controllers are designed, with each of them enabled within a specific operating area.
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Citation
Plianos, A. and Stobart, R., "Modeling and Control of Diesel Engines Equipped with a Two-Stage Turbo-System," SAE Technical Paper 2008-01-1018, 2008, https://doi.org/10.4271/2008-01-1018.Also In
References
- Tomazic D. Pfeifer A. Cooled egr, a must or an option for 2002/04 SAE paper 2002-01-0962 2002
- Langridge S. Fessler H. Strategies for high egr rates in a diesel engine SAE paper 2002-01-0961 2002
- Ladommatos N. Abdelhalim S.M. Zhao H. Hu Z. The dilution, chemical, and thermal effects of exhaust gas recirculation on diesel engine emissions - part 1: Effect of reducing inlet charge oxygen SAE paper 961165 , International Spring Fuels and Lubricants Meeting Dearborn, Michigan 1996
- Kolmanovsky I. Moraal P. van Nieuwstadt M. Stefanopoulou A. Issues in modeling and control of intake flow in variable geometry turbocharged engines in Proc. 18th IFIP Conf. Syst. Modeling and Optimization Detroit, Michigan 1997
- Jankovic M. Jankovic M. Kolmanovsky I. Constructive lyapunov control design for the turbocharger diesel engines IEEE Transactions on Control systems Technology 8 2 288 299 2000
- Jensen J.P Kristensen A.F Sorenson S.C Houbak N. Hendricks E. Mean value modeling of a small turbocharged diesel engine SAE , ( 910070 ) 1991
- Moraal P. Kolmanovsky I. Turbocharger modeling for automotive control applications SAE , ( 1999-01-0908 ) 1324 1338 1999
- Ferrari-Trecarte G. Museli M. Liberati D. Morari M. A clustering technique for the identification of piecewise affine systems Automatica 39 217205 2003
- Ortner P. de Re L. Predictive control of a diesel engine air path IEEE Transactions on Control systems Technology 15 3 449 456 2007
- Wei X. de Re L. Gain scheduled control for air path systems of diesel engines using lpv techniques IEEE Transactions on Control systems Technology 15 3 406 415 2007