COMBUSTION CHAMBERS FOR HIGH COMPRESSION RATIO D.I. DIESEL

In direct injection diesel engines having a unit displacement less than 1 liter, the use of high compression ratios (19/20 instead of 16/17) is mandatory for solving cold smoke problems and reducing HC/NOx emissions. The increase of compression ratio however is associated to the increase of black smoke and specific fuel consumption. On the basis of systematic measurements of the main combustion quantities and 2-D computations of the air motion and spray development inside the cylinder, a re-entrant high compression ratio chamber was defined. Experimental results in terms of fuel consumption, black smoke and gaseous emissions are presented. The optimum squish-to-swirl ratio is discussed.

  • Supplemental Notes:
    • Twentieth FISITA Congress, (SAE P-143), The Automotive Future, Volume 2, Austria, 6-11 May 1984.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Bassoli, C
    • Bodritti, G
    • CORNETTI, G M
  • Publication Date: 1984-5

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00392481
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 845038, HS-037 437
  • Files: HSL, USDOT
  • Created Date: Feb 28 1985 12:00AM