Dilution Effects on the Controlled Auto-Ignition (CAI) Combustion of Hydrocarbon and Alcohol Fuels

This paper presents results from an experimental programme researching the in-cylinder conditions necessary to obtain homogenous CAI (or HCCI) combustion in a 4-stroke engine. The fuels under investigation include three blends of Unleaded Gasoline, a 95 RON Primary Reference Fuel, Methanol, and Ethanol. This work concentrates on establishing the CAI operating range with regard to Air/Fuel ratio and Exhaust Gas Re-circulation and their effect on the ignition timing, combustion rate and variability, Indicated thermal efficiency, and engine-out emissions such as NOᵪ. Detailed maps are presented, defining how each of the measured variables changes over the entire CAI region. Results indicate that the alcohols have significantly higher tolerance to dilution than the hydrocarbon fuels tested. Also, variations in Gasoline blend have little effect on any of the combustion parameters measured.

• Record URL:
  • https://doi.org/10.4271/2001-01-3606
• 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:
  • Oakley, Aaron
  • Zhao, Hua
  • Ladommatos, Nicos
  • Ma, Tom
• Conference:
  • SAE 2002 World Congress & Exhibition
  • Location: Detroit Michigan, United States
  • Date: 2002-3-4 to 2002-3-7
• Publication Date: 2001-9-24

Language

• English

Media Info

• Media Type: Web
• 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: Combustion; Dilution; Ethanol; Exhaust gases; Experiments; Gasoline; Homogeneity; Hydrocarbons; Ignition systems; Methanol; Ratios; Thermal efficiency; Unleaded gasoline
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01768607
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 2001-01-3606
• Files: TRIS, SAE
• Created Date: Mar 26 2021 5:47PM