Investigation of Engine Oil Base Stock Effects on Low Speed Pre-Ignition in a Turbocharged Direct Injection SI Engine

Low speed pre-ignition (LSPI) is a type of engine knocking specific to turbocharged direct injection engines. There are numerous factors that affect the amount of LSPI produced by an engine. Some of these factors are related to engine hardware; others are specific to the fuel and engine oil. In this paper the authors focus on the effect of the engine oil base stock on LSPI. They conducted experiments in a stationary engine operating at conditions chosen to accentuate pre-ignition. The authors' results indicate that base stock viscosity has a statistically significant effect on the amount of low speed pre-ignition. Directionally, they found that engine oils formulated with higher viscosity base stocks produced more pre-ignition events. They measured the effect of base stock quality (defined by either Viscosity Index or concentration of aromatic species) to be small and statistically insignificant in their experimental data. In the course of their experimentation the authors detected a drift in the LSPI results from the test engines, and instituted an engine-hours correction on their results to compensate. They recommend that other researchers be wary of such a drift.

• Record URL:
  • https://doi.org/10.4271/2016-01-9071
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/19463952
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Andrews, Arthur
  • Burns, Raymond
  • Dougherty, Richard
  • Deckman, Douglas
  • Patel, Mrugesh
• Publication Date: 2016-3-14

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References;
• Pagination: pp 400-407
• Serial:
  • SAE International Journal of Fuels and Lubricants
  • Volume: 9
  • Issue Number: 2
  • Publisher: SAE International
  • ISSN: 1946-3952
  • EISSN: 1946-3960
  • Serial URL: https://www.sae.org/publications/collections/content/E-JOURNAL-04/

Subject/Index Terms

• TRT Terms: Engine knock; Engine oils; Fuel injection; Spark ignition engines; Turbochargers; Viscosity
• Subject Areas: Highways; Materials; Vehicles and Equipment;

Filing Info

• Accession Number: 01831955
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 2016-01-9071
• Files: TRIS, SAE
• Created Date: Dec 29 2021 10:54AM