Record Display for the EPA National Library Catalog


Main Title Effects of dynamometer variability on the confirmation of requests for alternate dynamometer power absorption /
Author Thompson, Glenn D.
CORP Author Environmental Protection Agency, Ann Arbor, MI. Standards Development and Support Branch.
Publisher U.S. Environmental Protection Agency, Office of Air and Waste Management, Office of Mobile Source Air Pollution Control, Emission Control Technology Division, Standards Development and Support Branch,
Year Published 1978
Report Number LDTP 78-05
Stock Number PB-299 114
OCLC Number 713646260
Subjects Automobiles--Motors--Exhaust gas ; Dynamometer ; Vehicle Emissions
Additional Subjects Automobiles ; Dynamometers ; Tests ; Manufacturers ; Tolerances(Mechanics) ; Exhaust emissions ; Fuel consumption ; Fuel economy ; Coast down tests
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELBD ARCHIVE EPA LDTP-78-05 AWBERC Library/Cincinnati,OH 01/09/2024
ELCD  EPA LDTP-78-05 NVFEL Library/Ann Arbor, MI 04/11/2013 DISPERSAL
NTIS  PB-299 114 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 22, [21] pages : charts ; 28 cm
The report discusses the variations which have been observed among the EPA light-duty vehicle dynamometers during vehicle-dynamometer coast-downs. The purpose of this investigation is to recommend a tolerance value for the allowable variation between the 'target' coastdown time interval, supplied by the manufacturer and the time interval obtained from the EPA vehicle-dynamometer confirmatory test. This tolerance is a measure of the acceptable error between the road experience of the vehicle as reported by the manufacturer and the simulation by the dynamometer during the EPA tests. As such the tolerance is a direct limit on the road load simulation error which EPA will accept and still consider the test results valid.
Cover title. "March, 1978." "LDTP 78-05." At head of title: Technical Support Report for Regulatory Action.