Truck Noise XI : Evaluation and Reduction of Heavy-Duty Truck Noise

Werner, V. Alan; Boyce, William

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Truck Noise XI : Evaluation and Reduction of Heavy-Duty Truck Noise

1976-09-01
By Werner, V. Alan ; Boyce, William

File Language:

English

[PDF - 12.10 MB]

Details

Creators:

Werner, V. Alan ; Boyce, William
Corporate Creators:

PACCAR
Corporate Publisher:

United States. Dept. of Transportation. Office of the Secretary
Corporate Contributors:

John A. Volpe National Transportation Systems Center, (U.S.) ; United States. Dept. of Transportation. Office of the Secretary
Subject/TRT Terms:
Publication/ Report Number:

DOT-TSC-OST-76-21
Resource Type:

Tech Report
Geographical Coverage:

Detroit (Michigan)
NTL Classification:

AGR-FREIGHT-Motor Carriers ; AGR-IMPACTS-Environment ; AGR-IMPACTS-Exports ; NTL-ENERGY AND ENVIRONMENT-Environment Impacts ; NTL-ENERGY AND ENVIRONMENT-ENERGY AND ENVIRONMENT ; NTL-FREIGHT-Trucking Industry
Description:

This report describes the work performed to examine the noise sources on two common truck configurations manufactured by this company, and to evaluate the noise reduction effectiveness of retrofit hardware. The two trucks selected were Cab-Over-Engine (COE) models with engines most often ordered with these models. One was a Kenworth K-123 with a Cummins NTC-350 engine, the other a Peterbilt 352A with a Detroit Diesel 8V-71T engine. The major noise source on both trucks was the cooling fan which led to modifications involving fan changes and fan speed decreases which resulted in decreased overall noise levels. The Kenworth's interior and exterior levels were reduced from 92 dB(A) to 89 dB(A) and from 91 dB(A) to 86.5 dB(A), respectively. The Peterbilt interior noise level was reduced from 95 dB(A) to 88.5 dB(A) and from 89 dB(A) to 84.5 dB(A) for the exterior. Further reduction of noise levels from these trucks would require additional cooling fan changes and some form of engine treatment, the engine being the second major noise source.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/10865/dot_10865_DS1.pdf
File Type:

[PDF - 12.10 MB]
Collection(s):

Volpe Center
Main Document Checksum:

urn:sha256:b6fe993691feacc898c701e7d42e1680d4ee2a5738b81b86d305184d7d28389a

File Language:

English

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