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Title: Characterization of temporal variations and feedback timescales of exhaust gas recirculation gas properties using high-speed diode laser absorption spectroscopy for next-cycle control of cyclic variability

Abstract

Dilute combustion offers efficiency gains in boosted gasoline direct injection engines both through knock-limit extension and thermodynamic advantages (i.e. the effect of γ on cycle efficiency), but is limited by cyclic variability at high dilution levels. Past studies have shown that the cycle-to-cycle dynamics are a combination of deterministic and stochastic effects. The deterministic causes of cyclic variations, which arise from feedback due to exhaust gas recirculation, imply the possibility of using active control strategies for dilution limit extension. While internal exhaust gas recirculation will largely provide a next-cycle effect (short-timescale feedback), the feedback of external exhaust gas recirculation will have an effect after a delay of several cycles (long timescale). Therefore, control strategies aiming to improve engine stability at dilution limit may have to account for both short- and long-timescale feedback pathways. This study shows the results of a study examining the extent to which variations in exhaust gas recirculation composition are preserved along the exhaust gas recirculation flow path and thus the relative importance and information content of the long-timescale feedback pathway. To characterize the filtering or retention of cycle-resolved feedback information, high-speed (1–5 kHz) CO 2 concentration measurements were performed simultaneously at three different locations along the low-pressuremore » external exhaust gas recirculation loop of a four-cylinder General Motors gasoline direct injection engine using a multiplexed two-color diode laser absorption spectroscopy sensor system during steady-state and transient engine operation at various exhaust gas recirculation levels. It was determined that cycle-resolved feedback propagates through internal residual gases but is filtered out by the low-pressure exhaust gas recirculation flow system and do not reach the intake manifold. Intermediate variations driven by flow rate and compositional changes are also distinguished and identified.« less

Authors:
 [1]; ORCiD logo [1]
  1. Oak Ridge National Laboratory, MS6472 Oak Ridge, TN, USA
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1564276
Alternate Identifier(s):
OSTI ID: 1528737
Grant/Contract Number:  
[AC05-00OR22725]
Resource Type:
Published Article
Journal Name:
International Journal of Engine Research
Additional Journal Information:
[Journal Name: International Journal of Engine Research Journal Volume: 20 Journal Issue: 8-9]; Journal ID: ISSN 1468-0874
Publisher:
SAGE Publications
Country of Publication:
United Kingdom
Language:
English
Subject:
Dilute combustion; cyclic variability; nonlinear dynamics; exhaust gas recirculation; combustion stability

Citation Formats

Jatana, Gurneesh S., and Kaul, Brian C. Characterization of temporal variations and feedback timescales of exhaust gas recirculation gas properties using high-speed diode laser absorption spectroscopy for next-cycle control of cyclic variability. United Kingdom: N. p., 2018. Web. doi:10.1177/1468087418805654.
Jatana, Gurneesh S., & Kaul, Brian C. Characterization of temporal variations and feedback timescales of exhaust gas recirculation gas properties using high-speed diode laser absorption spectroscopy for next-cycle control of cyclic variability. United Kingdom. doi:10.1177/1468087418805654.
Jatana, Gurneesh S., and Kaul, Brian C. Thu . "Characterization of temporal variations and feedback timescales of exhaust gas recirculation gas properties using high-speed diode laser absorption spectroscopy for next-cycle control of cyclic variability". United Kingdom. doi:10.1177/1468087418805654.
@article{osti_1564276,
title = {Characterization of temporal variations and feedback timescales of exhaust gas recirculation gas properties using high-speed diode laser absorption spectroscopy for next-cycle control of cyclic variability},
author = {Jatana, Gurneesh S. and Kaul, Brian C.},
abstractNote = {Dilute combustion offers efficiency gains in boosted gasoline direct injection engines both through knock-limit extension and thermodynamic advantages (i.e. the effect of γ on cycle efficiency), but is limited by cyclic variability at high dilution levels. Past studies have shown that the cycle-to-cycle dynamics are a combination of deterministic and stochastic effects. The deterministic causes of cyclic variations, which arise from feedback due to exhaust gas recirculation, imply the possibility of using active control strategies for dilution limit extension. While internal exhaust gas recirculation will largely provide a next-cycle effect (short-timescale feedback), the feedback of external exhaust gas recirculation will have an effect after a delay of several cycles (long timescale). Therefore, control strategies aiming to improve engine stability at dilution limit may have to account for both short- and long-timescale feedback pathways. This study shows the results of a study examining the extent to which variations in exhaust gas recirculation composition are preserved along the exhaust gas recirculation flow path and thus the relative importance and information content of the long-timescale feedback pathway. To characterize the filtering or retention of cycle-resolved feedback information, high-speed (1–5 kHz) CO 2 concentration measurements were performed simultaneously at three different locations along the low-pressure external exhaust gas recirculation loop of a four-cylinder General Motors gasoline direct injection engine using a multiplexed two-color diode laser absorption spectroscopy sensor system during steady-state and transient engine operation at various exhaust gas recirculation levels. It was determined that cycle-resolved feedback propagates through internal residual gases but is filtered out by the low-pressure exhaust gas recirculation flow system and do not reach the intake manifold. Intermediate variations driven by flow rate and compositional changes are also distinguished and identified.},
doi = {10.1177/1468087418805654},
journal = {International Journal of Engine Research},
number = [8-9],
volume = [20],
place = {United Kingdom},
year = {2018},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
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DOI: 10.1177/1468087418805654

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Works referenced in this record:

The Interaction between Fuel Anti-Knock Index and Reformation Ratio in an Engine Equipped with Dedicated EGR
journal, April 2016

  • Alger, Terrence; Walls, Mark; Chadwell, Christopher
  • SAE International Journal of Engines, Vol. 9, Issue 2
  • DOI: 10.4271/2016-01-0712

Prior-Cycle Effects in Lean Spark Ignition Combustion - Fuel/Air Charge Considerations
conference, February 1998

  • Wagner, R. M.; Drallmeier, J. A.; Daw, C. S.
  • International Congress & Exposition, SAE Technical Paper Series
  • DOI: 10.4271/981047

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
  • DOI: 10.4271/2013-01-0270

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
  • DOI: 10.4271/2014-01-1236

Synergies between High EGR Operation and GDI Systems
journal, April 2008

  • Alger, Terry; Chauvet, Thierry; Dimitrova, Zlatina
  • SAE International Journal of Engines, Vol. 1, Issue 1
  • DOI: 10.4271/2008-01-0134

Invited Review: A review of deterministic effects in cyclic variability of internal combustion engines
journal, February 2015

  • Finney, Charles EA; Kaul, Brian C.; Daw, C. Stuart
  • International Journal of Engine Research, Vol. 16, Issue 3
  • DOI: 10.1177/1468087415572033

The Reduced Effectiveness of EGR to Mitigate Knock at High Loads in Boosted SI Engines
journal, February 2017

  • Szybist, James P.; Wagnon, Scott W.; Splitter, Derek
  • SAE International Journal of Engines, Vol. 10, Issue 5
  • DOI: 10.4271/2017-24-0061

An assessment of thermodynamic merits for current and potential future engine operating strategies
journal, February 2017

  • Wissink, Martin L.; Splitter, Derek A.; Dempsey, Adam B.
  • International Journal of Engine Research, Vol. 18, Issue 1-2
  • DOI: 10.1177/1468087416686698

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
  • DOI: 10.1243/1468087001545209

A Simple Model for Cyclic Variations in a Spark-Ignition Engine
conference, October 1996

  • Daw, C. S.; Finney, C. E. A.; Green, J. B.
  • 1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition, SAE Technical Paper Series
  • DOI: 10.4271/962086

High-speed diode laser measurements of temperature and water vapor concentration in the intake manifold of a diesel engine
journal, January 2014

  • Jatana, Gurneesh S.; Naik, Sameer V.; Shaver, Gregory M.
  • International Journal of Engine Research, Vol. 15, Issue 7, p. 773-788
  • DOI: 10.1177/1468087413517107

Experimental Investigation of the Initial Stages of Flame Propagation in a Spark-Ignition Engine: Effects of Fuel, Hydrogen Addition and Nitrogen Dilution
journal, May 2010

  • Tahtouh, Toni; Halter, Fabien; MounaÏm-Rousselle, Christine
  • SAE International Journal of Engines, Vol. 3, Issue 2
  • DOI: 10.4271/2010-01-1451