TRUCK NOISE III-E: FREIGHTLINER QUIETED TRUCK COOLING SYSTEM, FIFTH REPORT

Considerations that determine the selection and the interrelation of major cooling system components are reviewed. The importance of viewing the entire cooling system when making design changes to reduce fan noise is emphasized. Freightliner's uniquely large radiator and extra large flow-through engine enclosure is described. These two design features allowed use of a large diameter, slow turning fan having negligible contribution to the truck's overall 72 dB(A) noise rating.

• Supplemental Notes:
  • See also report dated Oct 74, PB-240 010.
• Corporate Authors:

  Freightliner Corporation

  2525 SW Third Avenue
  Portland, OR  United States  97201

  Office of the Secretary of Transportation

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Hutton, TDJ
  • Kaye, M C
• Publication Date: 1975-9

Media Info

• Pagination: 54 p.

Subject/Index Terms

• TRT Terms: Cooling systems; Design; Engines; Environmental impacts; Fans; Mufflers; Noise; Noise control; Performance; Recommendations; Temperature control (Structures); Transportation; Trucks
• Uncontrolled Terms: Noise reduction; Transportation noise
• Old TRIS Terms: Cooling fans; Engine noise; Truck engines
• Subject Areas: Design; Transportation (General); Vehicles and Equipment;

Filing Info

• Accession Number: 00093603
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: DOT-TST-76-33
• Contract Numbers: DOT-OS-20095
• Files: NTIS, USDOT
• Created Date: Feb 4 2002 12:00AM