Investigation of Small Pilot Combustion in a Heavy-Duty Diesel Engine

Factors influencing pilot-injection combustion were investigated using heat release analysis in a heavy-duty diesel engine fuelled with standard diesel fuel. Combinations of pilot-injection parameters i.e. pilot start of injection, pilot mass, pilot-main injection separation, and rail pressure were studied for various operating conditions and combustion phases. An experiment was designed to investigate the factors influencing the combustion of the pilot. For improved injected fuel-mass accuracy, reference data for the injectors were measured in a spray rig prior to the engine experiments. Results show that cycle-to-cycle variations and cylinder-to-cylinder variations influence pilot autoignition and the amount of heat released. Rail pressure and injected pilot mass affect the obtained variance depending on the chamber conditions. The obtained combustion modes (premixed, diffusive) of pilot combustion were found to be a function of the injected mass and rail pressure.

• Record URL:
  https://doi.org/10.4271/2017-01-0718
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/19463936
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Jorques Moreno, Carlos
  • Stenlaas, Ola
  • Tunestal, Per
• Conference:
  • WCX™ 17: SAE World Congress Experience
  • Location: Detroit Michigan, United States
  • Date: 2017-4-4 to 2017-4-6
• Publication Date: 2017-3-28

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: pp 1193-1203
• Serial:
  • SAE International Journal of Engines
  • Volume: 10
  • Issue Number: 3
  • Publisher: SAE International
  • ISSN: 1946-3936
  • EISSN: 1946-3944
  • Serial URL: http://saeeng.saejournals.org/

Subject/Index Terms

• TRT Terms: Combustion; Combustion chambers; Diesel engines; Engine cycle; Engine performance; Fuel injection; Heavy duty vehicles; Internal combustion engines
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01639658
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 2017-01-0718
• Files: TRIS, SAE
• Created Date: Mar 29 2017 4:42PM