Investigating the Thermal and Chemical Kinetic Effects of the Internal Residual on the Cyclic Dynamics at the Dilute Limits of a Spark-Ignition Engine
The Cyclic Variability in the Misfire and Partial Burn Regimes of a Dilute Spark-Ignition Engine Are Primarily Due to the Feed-Forward Mechanism Present in the Residual Gases. This Study Experimentally Investigates the Influence of the Specific Heat Capacity/thermal Effect and Chemical Kinetic Effect of the Internal Residual on the Heat Release Dynamics in the Misfire and Partial Burn Regimes of a Dilute Spark-Ignition Engine. Each Effect is Investigated by Displacing Excess Air with Bottled N2 and CO. Both Short-Term and Long-Term Heat Release Dynamics Are Analyzed using Association Rules. Results Show Both an Increased Amount of Dilution and Higher Specific Heat Capacity Can Result in Similar Dynamics. It Was Also Found the Misfire Regime Appears to Be More Sensitive to the Chemical Kinetic Effect Than the Partial Burn Regime. Comparison of Spark-To-CA05 and Spark-To-CA50 between Dilution Methods Was Also Conducted, Where It Was Found the Chemical Kinetic Effect Did Tend to Reduce Both Spark-To-CA05 and Spark-To-CA50. overall, Results from This Study Suggest Different Control Strategies May Be Necessary to Effectively Mitigate the Combustion Instabilities When Operating in Each Regime.
R. Stiffler and J. (. Drallmeier, "Investigating the Thermal and Chemical Kinetic Effects of the Internal Residual on the Cyclic Dynamics at the Dilute Limits of a Spark-Ignition Engine," Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, SAGE Publications; Institution of Engineering and Technology (IET), Jan 2023.
The definitive version is available at https://doi.org/10.1177/09544070231187466
Mechanical and Aerospace Engineering
Keywords and Phrases
Cyclic dynamics; dilute spark-ignition combustion; internal residual; misfires and partial burns; N and CO dilution 2
International Standard Serial Number (ISSN)
Article - Journal
© 2023 SAGE Publications; Institution of Engineering and Technology (IET), All rights reserved.
01 Jan 2023