Development of CO2 Emission Conversion Factors for the Four Leading Global Driving Cycles

Development of Test Cycle Conversion Factors Among Worldwide Light-duty Vehicle CO2 Emission Standards
International Council on Clean Transportation / by Jörg Kühlwein, et al.
http://theicct.org/test-cycle-conversion-factors-methodology-paper

[Green Car Congress]  A team at the International Council on Clean Transportation (ICCT) has compared the dynamics of the four leading driving cycles worldwide—the US CAFE standards (a composite of FTP75 and HWFET); the New European Driving Cycle (NEDC); Japan’s JC08; and the recently developed Worldwide Harmonized Light-Duty Test Cycle (WLTC)—and their impacts on fuel consumption and CO2 emissions on an equal basis. (WLTC will be replacing NEDC in a few years.)

The result is a set of usable conversion factors for distance-based CO2 emissions among the different driving cycles. The ICCT team determined these factors on distinct levels of detail, characterized by technology parameters such as share of diesel engines in the fleet, vehicle size, share of hybrid systems, aerodynamic drag, and others…

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