This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Prediction of Dynamometer Power Absorption to Simulate Light-Duty Vehicle Road Load
Annotation ability available
Sector:
Language:
English
Abstract
When vehicle exhaust emission tests or vehicle fuel consumption measurements are performed on a chassis dynamometer, the dynamometer is usually adjusted to simulate the road experience of the vehicle. In this study, road load versus speed data were obtained from 64 light-duty vehicles.
Dynamometer power absorption settings to simulate the measured road loads are computed. These dynamometer settings are regressed against vehicle frontal area and vehicle inertia weight. It is concluded that the dynamometer load settings are most accurately predicted on the basis of the vehicle frontal area.
The frontal area based prediction system is then improved by separating vehicles into different classes and by including estimations of the effects of the vehicle protuberances.
Recommended Content
Authors
Citation
Thompson, G., "Prediction of Dynamometer Power Absorption to Simulate Light-Duty Vehicle Road Load," SAE Technical Paper 780617, 1978, https://doi.org/10.4271/780617.Also In
References
- White R.A. Korst H.H. “The Determination of Vehicle Drag Contribution from CoastDown Tests,” Society of Automobile Engineers 720099 New York, N.Y. 1972
- Thompson G.D. “Prediction of Dynamometer Power Absorption to Simulate Light-Duty Truck Road Load,” Society of Automobile Engineers 770844
- Crum W.B. “Road and Dynamometer Tire Power Dissipation,” Society of Automotive Engineers, 750955
- Clark S.K. “Rolling Resistance Forces in Pneumatic Tires,” University of Michigan Report DOT-TSC-76-1 Department of Transportation, Transportation Systems Center Cambridge, MA January 1976
- Schuring D.J. Clark S.K. “Interlaboratory Tests for Tire Rolling Resistance,” Society of Automobile Engineers, 780636
- Schuring D.J. “Rolling Resistance of Tires Measured Under Transient and Equilibrium Conditions on Calspan's Tire Research Facility,” March 1976
- Schuring D.J. Clark S.K. “Rolling Resistance of Tires Measured Under Transient and Equilibrium Conditions on Calspan's Tire Research Facility,” March 1976
- Scibor-Rylski A.J. Road Vehicle Aerodynamics John Wiley and Sons New York, N.Y. 1975
- Summary and Analysis of Comments to EPA Notice of Proposed Rulemaking for Fuel Economy Regulations September 1976
- Pershing B. “Estimation of Vehicle Aerodynamic Drag,” October 1976
- White R.G.S. “A Method of Estimating Automobile Drag Coefficients,” Society of Automobile Engineers 400 Commonwealth Drive, Warrendale, PA January 1969
- Scibor-Rylski A.J. “A Method of Estimating Automobile Drag Coefficients,” Society of Automobile Engineers 400 Commonwealth Drive, Warrendale, PA January 1969
- Hucho W.H. Janssen L.J. Emmelmann H.J. “The Optimization of Body Details - A Method for Reducing the Aerodynamic Drag on Road Vehicles,” Society of Automobile Engineers, 760185 Warrendale, PA February 1976
- Summary and Analysis of Comments to EPA Notice of Proposed Rulemaking for Fuel Economy Regulations September 1976
- Summmary and Analysis of Comments to EPA Notice of Proposed Rulemaking for Fuel Economy Regulations September 1976
- LaPoint C.W.
- Walter J.D. Conant F.S. “Energy Losses in Tires,” Tire Science and Technology TSTCA 2 4 November 1974