Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Brake Emissions: Emission Measurements from Brake and Clutch Linings from Selected Mobile Sources.
Author Jack, M. G. ; DuCharm, R. T. ;
CORP Author Bendix Research Labs., Southfield, Mich.
Year Published 1973
Report Number EPA-68-04-0020; 1557;
Stock Number PB-227 062
Additional Subjects Air pollution ; Brake linings ; Clutches ; Asbestos ; Motor vehicles ; Test equipment ; Wear ; Electron microscopy ; Optical measurement ; Design ; Chemical analysis ; Air pollution ; Tables(Data) ;
Library Call Number Additional Info Location Last
NTIS  PB-227 062 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 315p
Unique emissions collectors for both disc and drum brakes and for a clutch were conceived, designed, and built as the main embodiment of this instrumentation. The hardware was installed on a vehicle which was then driven through various test cycles to determine the extent and type of brake emissions generated at low and high operating temperatures. Typical original equipment and aftermarket friction materials for both disc and drum brakes were used in the tests. The particulates were processed and analyzed by a combination of optical and electron microscopy to ascertain the asbestos content and the asbestos particle size distribution in the wear debris. Comparisons of emissions from new and used friction materials, disc and drum brakes, and original equipment and aftermarket materials were made. Finally, an estimate was made of the total emission of asbestos by all of the vehicles in the country: on the average, more than 99.7 percent of the asbestos is converted; the contribution to the atmosphere is 5060 pounds, or 3.2 percent of the total asbestos emissions. (Author)