Part 1 of this 2-part article discusses 4 basic approaches to controlling noise radiated by engine surfaces: (1) Control noise generation from sources within the engine and its accessories; (2) Reduce transmission of vibration from sources to radiating surfaces; (3) Control vibration of external surfaces of the engine; (4) Enclose the engine. Ways of implementing each approach are outlined. The relative importance of combustion noise and mechanical noise is discussed, and a method of diagnosing the contribution to the overall engine noise from each surface area is covered. Part 2 describes in some detail the methods of diagnosing the vibrations from crankcase, cylinder block, valve gear covers and sump, and suggests ways of damping them to achieve an overall reduction of 5dBA or more.

  • Supplemental Notes:
    • Part 2 of this article appears in Volume 10, Number 1, January 1979, pp 5-7.
  • Corporate Authors:

    Trade and Technical Press, Limited

    Crown House
    Morden, Surrey SM4 5EW,   England 
  • Authors:
    • RUSSELL, M F
  • Publication Date: 1978-11

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00197157
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Aug 28 1979 12:00AM