SAE Standards Works
Truck and Bus Aerodynamics and Fuel Economy Committee
J2978 - Road Load Measurement Using Coastdown Techniques
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Road Load Measurement Using Coastdown Techniques
To establish a procedure for determination of truck and bus vehicle road load force. It employs the coastdown method and applies to truck and bus vehicles designed for on-road operation. The final result is a model of road load force (as a function of speed) during operation on a dry, level road under reference conditions and the transmission in neutral.