Influence of Calcium-Based Additives with Different Properties on Abnormal Combustion in an SI Engine

Technologies for further improving vehicle fuel economy have attracted widespread attention in recent years. However, one problem with some approaches is the occurrence of abnormal combustion such as low-speed pre-ignition (LSPI) that occurs under low-speed, high-load operating conditions. One proposed cause of LSPI is that oil droplets diluted by the fuel enter the combustion chamber and become a source of ignition. Another proposed cause is that deposits peel off and become a source of ignition. A four-stroke air-cooled single-cylinder engine was used in this study to investigate the influence of Ca-based additives having different properties on abnormal combustion by means of in-cylinder visualization and absorption spectroscopic measurements. The results obtained for neutral and basic Ca-based additives revealed that the former had an effect on advancing the time of autoignition.

• Record URL:
  https://doi.org/10.4271/2016-32-0007
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Shimizu, Kento
  • Takahata, Shuhei
  • Miura, Kenta
  • Shoji, Hideo
  • Iijima, Akira
  • Utaka, Toshimasa
  • Tamura, Kazushi
• Conference:
  • SAE/JSAE 2016 Small Engine Technology Conference & Exhibition
  • Location: Charleston South Carolina, United States
  • Date: 2016-11-15 to 2016-11-17
• Publication Date: 2016-11-8

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Serial:
  • SAE Technical Paper
  • Publisher: Society of Automotive Engineers (SAE)
  • ISSN: 0148-7191
  • EISSN: 2688-3627
  • Serial URL: http://papers.sae.org/

Subject/Index Terms

• TRT Terms: Calcium; Combustion; Combustion deposits; Engine knock; Fuel additives; Ignition systems; Lubricants; Spark ignition engines
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01623968
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 2016-32-0007
• Files: TRIS, SAE
• Created Date: Jan 25 2017 3:30PM