Record Display for the EPA National Library Catalog


Main Title Computer simulation of tire slip on a Clayton twin roll dynamometer /
Author Yurko, John.
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 1979
Report Number SDSB 79-10
Stock Number PB-297 764
OCLC Number 173417747
Subjects Dynamometers ; Friction ; Simulation ; Sliding friction ; Speed ; Tires ; Velocity ; Tire Modeling ; Tire Friction ; Velocity/ Speed
Additional Subjects Motor vehicles ; Automobile tires ; Rolling friction ; Velocity ; Dynamometers ; Fuel consumption ; Mathematical models ; Computerized simulation ;
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELBD ARCHIVE EPA SDSB-79-10 AWBERC Library/Cincinnati,OH 01/03/2024
ELCD  EPA SDSB-79-10 NVFEL Library/Ann Arbor, MI 04/18/2011 DISPERSAL
NTIS  PB-297 764 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9, [6] pages : charts ; 28 cm
Due to the occurrence of tire slip on a Clayton twin roll dynamometer, there is a difference between the velocities of the front and rear rolls of the dynamometer. This slip can be modeled by the method described in the following report. The results of this theoretically modeling show that, over the LA-4 and the HWFET driving schedules the velocity of the rear roll (which is currently used to determine the vehicle speed) exceeds the velocity of the front roll (which determines the power absorbed) by an average of approximately 1%. From this difference in velocities of the two rolls, a computation of the total energy effect, over transient driving cycles, can be obtained. Approximately a 2% to 5% increase in total energy dissipated over the city (LA-4) or highway driving schedules is predicted from the use of the front roll velocity to determine the vehicle speed, as compared to the currently used velocity of the rear roll.
Includes bibliographical references (page 9). Cover title. "SDSB 79-10." "February 1979." Technical report.