This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Direct Estimation of Cyclic Combustion Pressure Variability Using Engine Speed Fluctuations in an Internal Combustion Engine
Annotation ability available
Sector:
Language:
English
Abstract
Cyclic variability (CV) in combustion in IC-SI engines, manifested as variation in combustion pressure, is a long term as well as a contemporary problem. CV and its relation to several areas of engine control and diagnostics are discussed. A novel stochastic model relating combustion pressure to crankshaft velocity in an IC-SI engine is presented. This model incorporates a random combustion pressure signal model composed of a deterministic waveform and a random sequence modeling cyclic variation in combustion pressure. A discrete recursion is developed relating this sequence to noisy measurements of velocity. The inverse problem of reconstructing this sequence from one measurement of velocity per combustion is solved using a signal processing deconvolution method. Experimental results using real-world engine data are presented verifying the theoretical developments for low to moderate engine speed and moderate engine load. This reconstruction of cyclic pressure variability is simple to implement and may provide practical utility for engine control and diagnostics.
Recommended Content
Authors
Citation
Connolly, F., "Direct Estimation of Cyclic Combustion Pressure Variability Using Engine Speed Fluctuations in an Internal Combustion Engine," SAE Technical Paper 940143, 1994, https://doi.org/10.4271/940143.Also In
References
- Connolly F. T. Modeling and Identification of the Combustion Pressure Process in Internal Combustion Engines University of Michigan 1992
- Connolly F. T. Yagle A. E. “Modeling and identification of combustion pressure process in internal combustion engines,” Mechanical Systems and Signal Processing 7 September 1993
- Connolly F. T. Yagle A. E. “Modeling and identification of the combustion pressure process in internal combustion engines using engine speed fluctuations,” Proceedings 1992 ASME Symposium on Advanced Transportation Technologies Anaheim, CA 191 206 November 9-13 1992
- Al-Alousi Y. Karim G. “Some considerations of cyclic variations in spark ignited engines fueled with gaseous fuels,” Tech. Rep. 840232 SAE 1984
- Ando H. Motomochi M. “Contribution of fuel transport lag and statistical perturbation in combustion to oscillation of SI engine speed at idle,” Tech. Rep. 870545 SAE 1987
- Annand W. J. D. Summers I. G. S. “Observations on the variability of spark-ignition combustion using a single-cycle simulator,” Tech. Rep. 700487 SAE 1970
- Belmont M. Hancock M. Buckingham D. “Statistical aspects of cyclic variability,” Tech. Rep. 860324 SAE 1986
- Daily J. W. “Cycle to cycle variations: A chaotic process?,” Tech. Rep. 870165 SAE 1987
- Janula J. “The effect of cyclic dispersion of combustion pressure on working parameters of a spark ignited engine,” International Journal of Vehicle Design 4 6 1983
- Matekunas F. “Modes and measures of cyclic combustion variability,” Tech. Rep. 830337 SAE 1983
- Nohira H. Konomi T. Ishiyama S. “Analysis of cycle-by-cycle variation of combustion from pressure indicator data,” International Journal of Vehicle Design 1 2 1980
- Patterson D. J. “Cylinder pressure variations, a fundamental problem,” Tech. Rep. 660129 SAE 1966
- Yamamoto H. Misumi M. “Analysis of cyclic combustion variability in a lean operation SI engine,” Tech. Rep. 87054 SAE 1987
- Young M. B. “Cyclic dispersion in the homogeneouscharge spark-ignition engine-A literature survey,” Tech. Rep. 810020 SAE 1981
- Germane G. J. Wood C. W. Hess C. C. “Lean combustion in spark-ignited internal combustion engines-A review,” Tech. Rep. 831694 SAE 1983
- Ina T. Obayashi H. Shigematsu T. “Lean limit A/F control system by using engine speed variation,” Tech. Rep. 860413 SAE 1986
- Azzoni P. Cantoni G. Minelli G. Padovani E. “Combustion pressure recovering in spark ignition car engine,” Proceedings 22nd International Symposium on Automotive Technology and Automation Florence, Italy May 14-18 1990
- Azzoni P. Paniero A. “Cylinder pressure reconstruction by cepstrum analysis,” Proceedings 22nd International Symposium on Automotive Technology and Automation Florence, Italy May 14-18 1990
- Brown T. S. Neill W. S. “Determination of engine cylinder pressures from crankshaft speed fluctuations,” Tech. Rep. 920463 SAE 1992
- Chen S. K. Chen S. “Engine diagnostics by dynamic shaft measurement: A progress report,” Tech. Rep. 932412 SAE 1993
- Citron S. O'Higgins J. Chen L. “Cylinder by cylinder engine pressure and pressure torque waveform determination utilizing speed fluctuations,” Tech. Rep. 890486 SAE 1989
- Fehrenbach H. “Model-based combustion pressure computation through crankshaft angular acceleration analysis,” Proceedings 22nd International Symposium on Automotive Technology and Automation Florence, Italy 639 648 May 14-18 1990
- Iida K. Akishino K. Kido K. “IMEP estimation from instantaneous crankshaft torque variation,” Tech. Rep. 900617 SAE 1990
- Taraza D. “Possibilities to reconstruct indicator diagrams by analysis of the angular motion of the crankshaft,” Tech. Rep. 932414 SAE 1993
- Rizzoni G. Connolly F. T. “Estimate of IC engine torque from measurement of crankshaft angular position,” Tech. Rep. 932410 SAE 1993
- Leung C. K. Schira J. J. “Digital analyzer for internal combustion engines,” Tech. Rep. 820207 SAE 1982
- Mortara W. Canta C. “Engine stability sensor,” Tech. Rep. 830428 SAE 1983
- Ribbens W. B. “A new metric for torque nonuniformity,” Tech. Rep. 830425 SAE 1983
- Ribbens W. B. Park J. “Road test results of an IC engine misfire detection system,” Tech. Rep. 930398 SAE 1993
- Heywood J. B. “Engine combustion modeling-An overview,” Combustion Modeling In Reciprocating Engines Mattavi J. N. Amann C. A. Plenum Press 1980 Symposium on Combustion Modeling in Reciprocating Engines 1978 General Motors Research Laboratories
- Milane R. E. A Stochastic Model of Turbulent Mixing with Chemical Reactions: Combustion Period of an IC Engine University of Michigan 1982
- Mohammadzadeh A. tochastic Combustion Modeling of a Direct Injection Diesel Engine University of Michigan 1984
- Xiao Y. Stochastic Combustion Modeling of Direct Injection Diesel Engines University of Michigan 1991
- Powell B. K. Lawson G. P. Hogh G. “Advanced real time powertrain systems analysis,” Tech. Rep. 87-ICE-46 American Society of Mechanical Engineers 1987
- Dudek K. P. Sain M. K. “A control-oriented model for cylinder pressure in internal combustion engines,” IEEE Transactions on Automatic Control 34 386 396 April 1989
- Lichty L. Combustion Engine Processes New York McGraw Hill 1967
- Obert E. Internal Combustion Engines Scranton, PA International Textbook Company 1968
- Heywood J. Internal Combustion Engine Fundamentals McGraw-Hill 1988
- Rizzoni G. A Dynamic Model for the Internal Combustion Engine University of Michigan 1986
- Rizzoni G. “A stochastic model for the indicated pressure process and the dynamics of the internal combustion engine,” IEEE Transactions on Vehicular Technology 38 August 1989
- Mendel J. M. “White noise estimators for seismic data processing in oil exploration,” IEEE Transactions on Automatic Control AC-22 694 706 October 1977
- Lainiotis D. G. Katsikas S. K. Likothanasis S. D. “Adaptive deconvolution of seismic signalsPerformance, computational analysis, parallelism,” IEEE Transactions on Acoustics, Speech, and Signal Processing 36 1715 1734 November 1988
- Lancaster D. R. Krieger R. B. Lienesch J. H. “Measurement and analysis of engine pressure data,” Tech. Rep. 750026 SAE 1975
- Martin J. K. Plee S. L. Remboski D. J. “Burn modes and prior-cycle effects on cyclic variations in lean-burn spark-ignition engine combustion,” Tech. Rep. 880201 SAE 1988