Speed - mpg relationships are based on dynamometer tests of 74 light - duty vehicles representing a variety of manufacturers, nine vehicle classes, engine sizes 1.5 L to 6.2 L, and model years 2003 to 2012. (fueleconomy.gov)
This paper presents a review of existing literature on emission factors, emission data collection techniques, and analytic approaches; presents the results of SAIC's analysis of available CO2 and CH4 GHG emission data from chassis dynamometer tests of heavy - duty vehicle exhaust; and provides suggestions for further reducing this uncertainty. (transportation.gov)
Vazquez: The test itself is run on a chassis dynamometer in a controlled laboratory environment. (fueleconomy.gov)