Simulation of exhaust gas residuals in a turbocharged, spark ignition engine

Colin Copeland, Xing Gao, Paul Freeland, Jens Neumeister, John Mitcalf

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Highly downsized, Direct Injection (DI) engines benefit strongly from cylinder scavenging where possible, to reduce internal residuals thereby reducing the occurrence of knock. Some researchers also suggest that non-homogeneous distribution of internal residuals at high load could contribute to pre-ignition or ‘mega-knock’ with much higher pressure amplitude than that of common knock.

For this reason, a computational study was conducted to assess the residual gas fraction and in-cylinder distribution, using the combustion geometry of the three cylinder, 1.2L MAHLE Downsizing engine, which has proven to be a very robust and reliable research tool into the effects of combustion effects under a number of different operating conditions. This study used a CFD model of the cylinder gas exchange. ES-ICE coupled with STAR-CD was employed for a moving mesh, transient in-cylinder simulation. The boundary conditions were provided by a correlated 1-D (GT-power) model, with several scenarios simulated including engine speed, valve overlap and port geometry. The residual distributions at part load with different inlet ports were also assessed.
LanguageEnglish
Title of host publicationSociety of Automotive Engineerings
PublisherSAE International
DOIs
StatusPublished - 2013

Fingerprint

Engine cylinders
Exhaust gases
Internal combustion engines
Engines
Combustion knock
Gas cylinders
Geometry
Scavenging
Direct injection
Ignition
Computational fluid dynamics
Boundary conditions
Gases

Cite this

Copeland, C., Gao, X., Freeland, P., Neumeister, J., & Mitcalf, J. (2013). Simulation of exhaust gas residuals in a turbocharged, spark ignition engine. In Society of Automotive Engineerings [2013-01-2705] SAE International. https://doi.org/10.4271/2013-01-2705

Simulation of exhaust gas residuals in a turbocharged, spark ignition engine. / Copeland, Colin; Gao, Xing; Freeland, Paul; Neumeister, Jens; Mitcalf, John.

Society of Automotive Engineerings. SAE International, 2013. 2013-01-2705.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Copeland, C, Gao, X, Freeland, P, Neumeister, J & Mitcalf, J 2013, Simulation of exhaust gas residuals in a turbocharged, spark ignition engine. in Society of Automotive Engineerings., 2013-01-2705, SAE International. https://doi.org/10.4271/2013-01-2705
Copeland C, Gao X, Freeland P, Neumeister J, Mitcalf J. Simulation of exhaust gas residuals in a turbocharged, spark ignition engine. In Society of Automotive Engineerings. SAE International. 2013. 2013-01-2705 https://doi.org/10.4271/2013-01-2705
Copeland, Colin ; Gao, Xing ; Freeland, Paul ; Neumeister, Jens ; Mitcalf, John. / Simulation of exhaust gas residuals in a turbocharged, spark ignition engine. Society of Automotive Engineerings. SAE International, 2013.
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