Record Display for the EPA National Library Catalog


Main Title Testing Support for Evaluation of Inspection/Maintenance Issues (Test Group Nos. 6 and 8).
Author Ashby, H. Anthony ;
CORP Author Hamilton Test Systems, Inc., Phoenix, AZ.;Environmental Protection Agency, Ann Arbor, MI. Emission Control Technology Div.
Year Published 1979
Report Number EPA-68-03-2829;
Stock Number PB81-123499
Additional Subjects Automobiles ; Exhaust emissions ; Maintenance ; Inspection ; Diagnosis(General) ; Catalytic converters ; Air pollution ; Leaded gasoline ; Unleaded gasoline
Library Call Number Additional Info Location Last
NTIS  PB81-123499 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 47p
The intention of test group no. 6 was to evaluate the effect on exhaust emissions of disabling the heated air intake system. Ten vehicles were selected from the loaner fleet and were tested before and after disablement of the heated air intake system. No discernible difference was found between the before and after results. This result was attributed to the short period of time the heated air damper remained in the open position for the 'before disablement' test. Since all vehicles were cold soaked at a nominal temperature of 77 F, the temperature rapidly reached an operating temperature to close the damper. The intent of test group no. 8 was to provide test data to be used to evaluate the ability of various catalyst diagnostic tests to diagnose poisoned catalysts. The poisoning of the catalyst was accomplished by accumulating mileage using tankfuls of leaded fuel. After repeated tankfuls of leaded fuel were consumed, mileage was accumulated using tankfuls of unleaded fuel to provide data for evaluation of the rejuvenation process of the catalytic converter.