Since 1965 several authors have developed and introduced noise abatement capsules in order to diminish the noise of vehicles. This report gives a survey on the state of capsule development for passenger cars and commercial vehicles by describing 20 concepts which were developed and realised. Various capsule-types can be classified as "engine capsule" which can be regarded as parts of the engine, and "body capsules" which use parts of the car's body to enclose the engine compartment. Another criterion for distinguishing the models is the air flow: cooling air can be channelled behind the cooler through the capsule room (tunnel capsule); this type is built as an engine capsule. Cooling air can also be channeled around--above, underneath or alongside--the capsule. The capsule room partly by cooling air ducts in critical temperature areas. This type can be used for engine- and body capsules. Only a few capsules have been used for serial production (VOeV-Standard-routine bus, VW-bus D, VW-minitruck). Capsules will most certainly be used for commercial vehicles in future, the definite time however depends on the development of legislation and demand. For passenger cars capsules will be used only if engine and gearbox-measures are insufficient to achieve the desired values. (ERA citation 09:031138)

  • Supplemental Notes:
    • Portions are Illegible in Microfiche Products.
  • Corporate Authors:


  • Publication Date: 1982-3


  • German

Media Info

  • Pagination: 46 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00393664
  • Record Type: Publication
  • Report/Paper Numbers: VW-FMT-825V/5
  • Files: TRIS
  • Created Date: Jun 30 1985 12:00AM