Four quieted over-the-road tractors were designed and produced. These were evaluated in fleet service. Significant reductions in diesel truck noise were achieved with current state-of-the-art by using a systematic approach on each major noise source. The report describes the fleet test hardware that originally went into service and documents the degradation and normal abuse of the noise control equipment and the resulting changes in the noise levels after the inservice life of the linehaul trucks--approximately 3 years and 400,000 miles. A comparative analysis of fleet maintenance and operating costs for the quiet trucks and like production vehicles is also provided.
Truck Noise IV-H: Post-Fleet Test Results on Heavy Duty Diesel Trucks Having Reduced Noise Emissions
1979
104 pages
Report
No indication
English
Road Transportation , Noise Pollution & Control , Trucks , Noise reduction , Field tests , Diesel engines , Noise pollution , Tractors , Modification kits , Enclosures , Cooling systems , Air intakes , Fuel consumption , Exhaust systems , Maintenance , Cost effectiveness , Acoustic measurement , Service life , Truck noise , Noise levels
Heavy-Duty Diesel Truck Emissions Modeling
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