Product Code:SAE J2978
Title:Road Load Measurement Using Coastdown Techniques
Issuing Committee:Truck And Bus Aerodynamics And Fuel Economy Committee
Scope: 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.
Rationale: 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.