Correlating Laboratory Oil Aerosol Coking Rig Tests to Diesel Engine Tests to Understand the Mechanisms Responsible for Turbocharger Compressor Coking

Dairene Uy, George Pranis, Anthony Morelli, Arup Gangopadhyay, Alexander Michlberger, Nicholas Secue, Mike Kinzel, Tina Adams, Kevin Streck, Michael Lance, Andrew Wereszczak

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

Deposit formation within turbocharger compressor housings can lead to compressor efficiency degradation. This loss of turbo efficiency may degrade fuel economy and increase CO2 and NOx emissions. To understand the role that engine oil composition and formulation play in deposit formation, five different lubricants were run in a fired engine test while monitoring turbocharger compressor efficiency over time. Base stock group, additive package, and viscosity modifier treat rate were varied in the lubricants tested. After each test was completed the turbocharger compressor cover and back plate deposits were characterized. A laboratory oil mist coking rig has also been constructed, which generated deposits having the same characteristics as those from the engine tests. By analyzing results from both lab and engine tests, correlations between deposit characteristics and their effect on compressor efficiency were observed. The physical characteristics of these deposits, as well as parameters affecting deposit formation such as the chemistry of the oil formulations, oil aerosol particle sizes, and mass of oil mist flow are discussed. The rough/smooth and dry/wet qualities of the deposits were found to correlate most with compressor efficiency loss; thickness and mass of deposits did not correlate.

Original languageEnglish
JournalSAE Technical Papers
Volume2017-March
Issue numberMarch
DOIs
StatePublished - Mar 28 2017
EventSAE World Congress Experience, WCX 2017 - Detroit, United States
Duration: Apr 4 2017Apr 6 2017

Fingerprint

Dive into the research topics of 'Correlating Laboratory Oil Aerosol Coking Rig Tests to Diesel Engine Tests to Understand the Mechanisms Responsible for Turbocharger Compressor Coking'. Together they form a unique fingerprint.

Cite this