TRUCK NOISE IV-D: THE REDUCTION OF INTAKE AND EXHAUST NOISE ON HEAVY DUTY DIESEL TRUCKS
The exhaust and intake systems are often major contributors of noise on heavy duty diesel trucks. Using a systematic approach, the sources of exhaust and intake noise are identified and studied. The noise radiated from the surface of the exhaust pipe (pipe shell noise) was the major cause of exhaust noise. Pipe shell noise was partially controlled by muffler design; however, the principles are not fully understood. A reduction in exhaust noise of more than 10 dB(A) was achieved by utilizing a large volume, wrapped muffler along with leak resistant exhaust joints. Intake noise was generated by the Roots type blower used on the engine. The noise was transmitted out the inlet opening of the intake system. Intake noise was reduced 8 dB(A) by adding a silencer to the system which was tuned to be the critical blower frequency.
- Prepared in cooperation with Donaldson Co., Inc., Minneapolis, Minn. See also PB-234 501.
International Harvester CompanyTruck Engineering Center
Fort Wayne, Indiana, USA 46801
Department of Transportation1200 New Jersey Avenue, SE
Washington, DC USA 20590
Donaldson Company, Incorporated1400 West 94th Street
Minneapolis, MN USA 55431
- Shrader, J T
- Priadka, N
- Publication Date: 1974-10
- Pagination: 140 p.
- TRT Terms: Diesel engines; Diesel trucks; Emission control systems; Engines; Exhaust gases; Exhaust pipes; Fans; Intake valves; Mufflers; Noise; Noise control; Traffic noise; Trucks
- Uncontrolled Terms: Noise reduction; Sources
- Old TRIS Terms: Blowers; Engine noise; Intake systems; Truck engines; Truck noise
- Subject Areas: Environment; Highways; Motor Carriers; Safety and Human Factors; Vehicles and Equipment;
- Accession Number: 00090049
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: Rept. No 4
- Contract Numbers: DOT-OS-20222
- Files: NTIS, TRIS, USDOT
- Created Date: Apr 22 1975 12:00AM