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NREL study finds Class 8 hybrid trucks delivered 13.7% higher fuel economy than conventional diesels in comparable usage

Green Car Congress

Laboratory and in-use fuel economy comparison. Source: NREL. Click to enlarge. higher fuel economy than the conventional tractors, resulting in a 12% reduction in fuel costs for the hybrids. Eaton hybrid system schematic. Click to enlarge. A random dispatch system ensured the vehicles are used in a similar manner.