Road Load Measurement and Dynamometer Simulation Using Coastdown Techniques 810828

Reduction of vehicle road load is important in the overall effort to improve fuel economy in motor vehicles. The ability to accurately simulate vehicle road load on a chassis dynamometer is similarly critical in the process of measuring fuel economy on such a dynamometer. This paper discusses coastdown techniques of road load measurement and dynamometer simulation from the standpoint of SAE Recommended Practice J1263 developed by an SAE Task Force between 1976 and 1979. These techniques are compared to other methods and the equations used to determine the absorber setting which duplicates vehicle road load for a single parameter chassis dynamometer are developed.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 40% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.