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Six Degrees Crankshaft Individual Air Fuel Ratio Estimation of Diesel Engines for Cylinder Balancing Purpose
Technical Paper
2006-01-0013
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In the context of modern engine control, one important variable is the individual Air Fuel Ratio (AFR) which is a good representation of the produced torque. It results from various inputs such as injected quantities, boost pressure, and the exhaust gas recirculation (EGR) rate. Further, for forthcoming HCCI engines and regeneration filters (Particulate filters, DeNOx), even slight AFR unbalance between the cylinders can have dramatic consequences and induce important noise, possible stall and higher emissions. Classically, in Spark Ignition engine, overall AFR is directly controlled with the injection system. In this approach, all cylinders share the same closed-loop input signal based on the single λ-sensor (normalized Fuel-Air Ratio measurement, it can be rewritten with AFR as they have the same injection set-point. Unfortunately, due to inherent flaws of the injection system (pressure waves, mechanical tolerances, …), the total mass of fuel injected in each cylinder is very difficult to predict with a relative precision better than 7%. Having a sensor in each cylinder would enable an accurate individual control. In practice, cost and reliability of multiple λ-sensors prevent them from reaching commercial products lines. In this context, individual cylinder AFR estimation can give crucial information to get the HCCI running better.
The contribution of this paper is the design and experimental tests of a real-time observer for the individual cylinder AFR using the reliable and available λ-sensor placed downstream the turbine as only measurement. In previous works, the methods used to reconstruct the AFR of each cylinder from the UEGO (Universal Exhaust Gas Oxygen) λ-sensor measurement are based on the permutation dynamics at the TDC (Top-Dead Center) time-scale and a gain identification technique. Here, we propose a higher frequency approach (6 degree crankshaft angle modelling and update instead of 180(TDC)). We design an observer on the balance model of the exhaust and design a high frequency observer to solve the problem. We use a physics-based model underlying the role of periodic input flows (gas flows from the cylinders into the exhaust manifold). The observer is validated experimentally on a 4 cylinder HCCI engine. As a conclusion, we provide results of closed-loop control using the proposed technique to prove the relevance of this approach.
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Citation
Chauvin, J., Petit, N., Rouchon, P., Moulin, P. et al., "Six Degrees Crankshaft Individual Air Fuel Ratio Estimation of Diesel Engines for Cylinder Balancing Purpose," SAE Technical Paper 2006-01-0013, 2006, https://doi.org/10.4271/2006-01-0013.Also In
References
- Guzzella L. Amstutz A. Control of Diesel engines Proc. of the IEEE Control Systems Magazine 18 53 71 1998
- Kiencke U. Nielsen L. Automotive Control Systems For Engine, Driveline, and Vehicle SAE Internationnal 2000
- Rizzoni G. Estimate of indicated torque from crankshaft speed fluctuations: A model for the dynamics of the IC engine Proc. of the IEEE Transactions on Vehicular Technology 38 169 179 1989
- Gyan P. Ginoux S. Champoussin J.C. Guezennec Y. Crankangle based torque estimation: Mechanistic/stochastic Proc. of the SAE Conference 2000
- Guezennec Y. Gyan P. A novel approach to real-time estimation of the individual cylinder pressure for S.I. engine control Proc. of the SAE Conference 1999
- Chauvin J. Corde G. Moulin P. Castagné M. Petit N. Rouchon P. Real-time combustion torque estimation on a Diesel engine test bench using time-varying Kalman filtering Proc. of the the 43 rd IEEE Conf. Decision and Control 2004
- Chauvin J. Corde G. Moulin P. Castagné M. Petit N. Rouchon P. Real-time combustion torque estimation on a Diesel engine test bench using an adaptive Fourier basis decomposition Proc. of the the 43 rd IEEE Conf. Decision and Control 2004
- Kahrstedt J. Behnk K. Sommer A. Wormbs T. Combustion processes to meet future emission standards Motortechnische Zeitschrift 1417 1423 2003
- Hultqvist A. Engdar U. Johansson B. Klingmann J. Reacting boundary layers in a homogeneous charge compression ignition (HCCI) engine Proc. of the SAE Conference 2001
- Amnéus P. Nilsson D. Mauss F. Christensen M. Johansson B. Homogeneous Charge Compression Ignition engine: Experiments and detailed kinetic calculations 4 th International Symposium on Diagnostic and Modeling in Internal Combustion Engines 1998
- Walter B. Gatellier B. Near zero NO x emissions and high fuel efficiency diesel engine: the NADI ™ concept using dual mode combustion 58 1 101 114 2003
- Moraal P. Yacoub Y. Christen U. Carberry B. Guérin S. Diesel particulate filter regeneration: Control or calibration? IFAC Symp. Advances in Automotive Control (AAC04) 2004
- Auckenthaler T. Onder C. Geering H. Aspects of dynamic three-way catalyst behaviour including oxygen storage IFAC Symp. Advances in Automotive Control (AAC04) 2004
- Kreuzer T. Lox E. Lindner D. Leyrer J Advanced exhaust gas aftertreatment systems for gasoline and Diesel fuelled vehicles Catalysis Today 29 17 27 1996
- Berggren P. Perkovic A. Cylinder individual lambda feedback control in an SI engine Linköpings Universitet 1996
- Grizzle J. Dobbins K. Cook J. Individual cylinder air-fuel ratio control with a single EGO sensor Proc. of the IEEE Transactions on Vehicular Technology 40 1 357 381 February 1991
- Carnevale C. Hadji M. Cylinder to cylinder AFR control with an asymmetrical exhaust manifold in a GDI system Proc. of the SAE Conference 1998
- Fantini J. Burq J.-F. Exhaust-intake manifold model for estimation of individual cylinder air fuel ratio and diagnostic of sensor-injector Proc. of the SAE Conference , number 2003-01-1059 2003
- Albrecht A. Chauvin J. Potteau S. Corde G. Design of real-time torque balancing control for highly premixed combustion engine using a 1d Diesel engine model Proc. of the IAV Conference “Engine process simulation and supercharging” 2005
- Heywood J. Internal Combustion Engine Fundamentals McGraw-Hill, Inc 1988
- Jensen J. Kristensen A. Sorensen S. Houbak N. Hendricks E. Mean value modeling of a small turbocharged Diesel engine Proc. of the SAE Conference , number 910070 1991
- Moraal P. Kolmanovsky I. Turbocharger modeling for automotive control applications Proc. of the SAE Conference , number 1999-01-0908 1999
- Chauvin J. Moulin P. Corde G. Petit N. Rouchon P. Real-time nonlinear individual cylinder Air Fuel Ratio observer on a Diesel engine test bench Proc. of the IFAC World Congress 2005
- Khalil H. Nonlinear Systems Prentice-Hall, Inc. 1992
- Albrecht A. Corde G. Knop V. 1d simulation of turbocharged gasoline direct injection engine for transient strategy optimization Proc. of the SAE Conference , number 2005-01-0693 2005
- Lafossas F. Colin O. Le Berr F. Ménégazzi P. Application of a new 1d combustion model to gasoline transient engine operation Proc. of the SAE Conference , number 2005-01-2107 2005
- Jaine T. Benkenida A. Ménégazzi P. Higelin P. Zero dimensional computation of diesel spray - comparison with experiments and 3d model 6 th International Conference on Engines for Automobile Capri, Italy 2003
- Chmela F. Orthaber G. Rate of heat release prediction for direct injection Diesel engines based on purely mixing controlled combustion Proc. of the SAE Conference , number 1999-01-0186 1999
- Barba C. Burkhardt C. A phenomenological combustion model for heat release rate prediction in high-speed DI Diesel engines with common rail injection Proc. of the SAE Conference , number 2000-01-2933 2000
- Chauvin, J. Corde G. Petit N. Rouchon P. Periodic input observer design: Application for unbalance diagnosis Proc. of the SAE Conference , number 2006-01-0181 2006