TRUCK NOISE IV-D: THE REDUCTION OF ENGINE NOISE ON HEAVY DUTY DIESEL TRUCKS

The vibration of the external surfaces of the engine is sometimes a major cause of noise emissions from a Detroit Diesel 8V-71, two cycle diesel engine. Since major engine modifications were beyond the scope of this project, the reduction in engine noise was obtained through shielding. One shielding technique employed close-fitting acoustical covers mounted to the engine itself. Another employed a partial engine enclosure mounted to the chassis. With both shielding techniques, the proper acoustical lining was found to be important as well as sealing. A Detailed development of these shields is given.

• Supplemental Notes:
  • See also report no. 4, PB-238 361.
• Corporate Authors:

  International Harvester Company

  Truck Engineering Center
  Fort Wayne, Indiana,   United States  46801

  Office of Noise Abatement

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Shrader, J T
• Publication Date: 1975-4

Media Info

• Pagination: 127 p.

Subject/Index Terms

• TRT Terms: Combustion; Diesel engines; Engines; Mechanical properties; Noise; Noise control; Performance evaluations; Tests; Trucks; Vibration; Weight
• Uncontrolled Terms: Enclosures; Noise reduction; Shielding
• Old TRIS Terms: Covering; Engine noise; Truck engines; Weight mass
• Subject Areas: Environment; Motor Carriers; Vehicles and Equipment;

Filing Info

• Accession Number: 00092243
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Rpt. No. 5, DOT/TST-75-88
• Contract Numbers: DOT-OS-20222
• Files: NTIS
• Created Date: Oct 18 1976 12:00AM