Wood, E., Gonder, J., and Jehlik, F., "On-Road Validation of a Simplified Model for Estimating Real-World Fuel Economy," SAE Int. J. Fuels Lubr. 10(2):2017, doi:10.4271/2017-01-0892.
On-road fuel economy is known to vary significantly between individual trips in real-world driving conditions. This work introduces a methodology for rapidly simulating a specific vehicle’s fuel economy over the wide range of real-world conditions experienced across the country. On-road test data collected using a highly instrumented vehicle is used to refine and validate this modeling approach. Model accuracy relative to on-road data collection is relevant to the estimation of “off-cycle credits” that compensate for real-world fuel economy benefits that are not observed during certification testing on a chassis dynamometer.