Characterizing dilute combustion instabilities in a multi-cylinder spark-ignited engine using symbolic analysis
Abstract
Spark-ignited internal combustion engines have evolved considerably in recent years in response to increasingly stringent regulations for emissions and fuel-economy. One new advanced engine strategy utilizes high levels of exhaust gas recirculation (EGR) to reduce combustion temperatures, thereby increasing thermodynamic efficiency and reducing nitrogen oxide emissions. While this strategy can be highly effective, it also poses major control and design challenges due to the large combustion oscillations that develop at sufficiently high EGR levels. Previous research has documented that combustion instabilities can propagate between successive engine cycles in individual cylinders via self-generated feedback of reactive species and thermal energy in the retained residual exhaust gases. In this work, we use symbolic analysis to characterize multi-cylinder combustion oscillations in an experimental engine operating with external EGR. At low levels of EGR, intra-cylinder oscillations are clearly visible and appear to be associated with brief, intermittent coupling among cylinders. As EGR is increased further, a point is reached where all four cylinders lock almost completely in phase and alternate simultaneously between two distinct bi-stable combustion states. From a practical perspective, it is important to understand the causes of this phenomenon and develop diagnostics that might be applied to ameliorate its effects. We demonstratemore »
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center (FEERC)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center (FEERC)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1185518
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Philosophical Transactions of the Royal Society. A, Mathematical, Physical and Engineering Sciences
- Additional Journal Information:
- Journal Volume: 373; Journal Issue: 2034; Journal ID: ISSN 1364-503X
- Publisher:
- The Royal Society Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; engine; exhaust gas recirculation; combustion instability; symbolic analysis
Citation Formats
Daw, C. Stuart, Finney, Charles E. A., Kaul, Brian C., Edwards, Kevin Dean, and Wagner, Robert M. Characterizing dilute combustion instabilities in a multi-cylinder spark-ignited engine using symbolic analysis. United States: N. p., 2014.
Web. doi:10.1098/rsta.2014.0088.
Daw, C. Stuart, Finney, Charles E. A., Kaul, Brian C., Edwards, Kevin Dean, & Wagner, Robert M. Characterizing dilute combustion instabilities in a multi-cylinder spark-ignited engine using symbolic analysis. United States. https://doi.org/10.1098/rsta.2014.0088
Daw, C. Stuart, Finney, Charles E. A., Kaul, Brian C., Edwards, Kevin Dean, and Wagner, Robert M. Mon .
"Characterizing dilute combustion instabilities in a multi-cylinder spark-ignited engine using symbolic analysis". United States. https://doi.org/10.1098/rsta.2014.0088. https://www.osti.gov/servlets/purl/1185518.
@article{osti_1185518,
title = {Characterizing dilute combustion instabilities in a multi-cylinder spark-ignited engine using symbolic analysis},
author = {Daw, C. Stuart and Finney, Charles E. A. and Kaul, Brian C. and Edwards, Kevin Dean and Wagner, Robert M.},
abstractNote = {Spark-ignited internal combustion engines have evolved considerably in recent years in response to increasingly stringent regulations for emissions and fuel-economy. One new advanced engine strategy utilizes high levels of exhaust gas recirculation (EGR) to reduce combustion temperatures, thereby increasing thermodynamic efficiency and reducing nitrogen oxide emissions. While this strategy can be highly effective, it also poses major control and design challenges due to the large combustion oscillations that develop at sufficiently high EGR levels. Previous research has documented that combustion instabilities can propagate between successive engine cycles in individual cylinders via self-generated feedback of reactive species and thermal energy in the retained residual exhaust gases. In this work, we use symbolic analysis to characterize multi-cylinder combustion oscillations in an experimental engine operating with external EGR. At low levels of EGR, intra-cylinder oscillations are clearly visible and appear to be associated with brief, intermittent coupling among cylinders. As EGR is increased further, a point is reached where all four cylinders lock almost completely in phase and alternate simultaneously between two distinct bi-stable combustion states. From a practical perspective, it is important to understand the causes of this phenomenon and develop diagnostics that might be applied to ameliorate its effects. We demonstrate here that two approaches for symbolizing the engine combustion measurements can provide useful probes for characterizing these instabilities.},
doi = {10.1098/rsta.2014.0088},
journal = {Philosophical Transactions of the Royal Society. A, Mathematical, Physical and Engineering Sciences},
number = 2034,
volume = 373,
place = {United States},
year = {Mon Dec 29 00:00:00 EST 2014},
month = {Mon Dec 29 00:00:00 EST 2014}
}
Search WorldCat to find libraries that may hold this journalWeb of Science
Works referenced in this record:
Characterization of lean combustion instability in premixed charge spark ignition engines
journal, August 2000
- Wagner, R. M.; Drallmeier, J. A.; Daw, C. S.
- International Journal of Engine Research, Vol. 1, Issue 4
A review of symbolic analysis of experimental data
journal, February 2003
- Daw, C. S.; Finney, C. E. A.; Tracy, E. R.
- Review of Scientific Instruments, Vol. 74, Issue 2
Analysis of Cyclic Variability of Heat Release for High-EGR GDI Engine Operation with Observations on Implications for Effective Control
journal, April 2013
- Kaul, Brian; Wagner, Robert; Green, Johney
- SAE International Journal of Engines, Vol. 6, Issue 1
Effects of External EGR Loop on Cycle-to-Cycle Dynamics of Dilute SI Combustion
journal, April 2014
- Kaul, Brian C.; Finney, Charles E. A.; Wagner, Robert M.
- SAE International Journal of Engines, Vol. 7, Issue 2
Synchronization of combustion variations in a multicylinder spark ignition engine
journal, January 2000
- Daw, C. Stuart; Green, Johney B.; Wagner, Robert M.
- Proceedings of the Combustion Institute, Vol. 28, Issue 1
Cycle-to-Cycle Variations: A Chaotic Process?
journal, February 1988
- Daily, John W.
- Combustion Science and Technology, Vol. 57, Issue 4-6
Observing and modeling nonlinear dynamics in an internal combustion engine
journal, March 1998
- Daw, C.; Kennel, M.; Finney, C.
- Physical Review E, Vol. 57, Issue 3
A Dynamical Instability of Spark-Ignited Engines
journal, June 1984
- Kantor, J. C.
- Science, Vol. 224, Issue 4654
Early-warning signals for critical transitions
journal, September 2009
- Scheffer, Marten; Bascompte, Jordi; Brock, William A.
- Nature, Vol. 461, Issue 7260