OUTLINE OF RESEARCH WORKS ON HEAVY VEHICLE NOISE REDUCTION IN JAPAN

A noise reduction project conducted by four major Japanese heavy-duty vehicle manufacturers is described. Initiated in April 1974, the three-year project had a target noise level of 86 decibels in the ISO (International Standards Organization) R362 accelerated passby test. Hino Motors Limited investigated engine encapsulation; Isuzu Motors Limited, Mitsubishi Motors Corporation, and Nissan Diesel Motor Company respectively studied noise reduction of the cooling system, exhaust system, and engine. An experimental vehicle was built by each manufacturer incorporating its own as well as the other companies' technological developments. The vehicles were a 6 x 4 straight cargo truck, a 6 x 4 straight dump truck, a 4 x 2 rear-engine bus, and a 4 x 2 truck tractor. This joint effort was partially successful in reducing noise from the major sources; a second phase of research is underway to include tire and powertrain noise reduction.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/6664983
• Supplemental Notes:
  • Sponsored by Ministry of International Trade and Industry (Japan). See also HS-030 207--HS-030 209.
• Corporate Authors:

  Society of Automotive Engineers of Japan

  10-2 Goban-cho, Chiyoda-ku
  Tokyo,   Japan 
• Authors:
  • Yamazaki, H
• Publication Date: 1980

Media Info

• Features: References;
• Pagination: p. 9-16
• Serial:
  • JSAE Review
  • Issue Number: 2
  • Publisher: Society of Automotive Engineers of Japan
  • ISSN: 0389-4304
  • Serial URL: http://www.sciencedirect.com/science/journal/03894304

Subject/Index Terms

• TRT Terms: Buses; Commercial vehicles; Cooling; Dump trucks; Emission control systems; Encapsulation; Engines; Exhaust gases; Foreign automobiles; Heavy vehicles; Noise control; Prototypes; Traffic noise; Truck tractors
• Old TRIS Terms: Foreign vehicles
• Subject Areas: Bridges and other structures; Public Transportation; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00379495
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: HS-030 206
• Files: HSL, USDOT
• Created Date: Nov 30 1983 12:00AM