To determine present noise levels associated with a truck of the same class and performance characteristics as the quieted truck, tests were performed on a newly manufactured standard production truck on a road and at the Freightliner test facilities. The report presents noise data obtained from road tests of the datum truck for a range of operating conditions and baseline data obtained in accordance with the SAE J366a test standard. Individual sources of noise including engine, intake, exhaust, fan, transmission and differential are analyzed and recommendations are made for the initial configuration of the quieted truck. Specifications of the datum truck are given.
Truck Noise III-A. Preliminary Noise Diagnosis of Freightliner Datum Truck-Tractor
1973
60 pages
Report
No indication
English
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