DESIGN ASPECTS OF LOW-NOISE DIESEL ENGINES

Methods of reducing the noise level of a diesel engine include the suppression of the major modes of block vibration and treatment of the external surfaces. Design methods enable the frequencies and noise levels of these modes to be calculated for a conventionally designed engine. The important modes of vibration, the noise signature and the effect of block modifications of a standard production V-8 engine were found by experiments. These provided the basis for the design of an experimental low-noise engine. Design features include a stiffer block, removal of the bottom part of the crankcase skirt, the addition of a single bearing beam, and the use of isolated panels and damped surfaces. The noise reduction obtained was 9 dBA. Most of this is due to the use of isolated and damped nonload carrying surfaces.

  • Supplemental Notes:
    • From International Automotive Engineering Congress, Detroit, Michigan, January 8-12, 1973.
  • Corporate Authors:

    Society of Automotive Engineers

    485 Lexington Avenue
    New York, NY  USA  10017
  • Authors:
    • Jenkins, S H
    • LALOR, N
    • Grover, E C
  • Publication Date: 1973

Media Info

  • Features: Figures; References;
  • Pagination: 17 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00261257
  • Record Type: Publication
  • Report/Paper Numbers: SAE 730246
  • Files: TRIS
  • Created Date: Oct 22 1974 12:00AM