Abstract

Coasting is frequently used by drivers on level road. So analyzing vehicle’s fuel consumption feature during sliding process has practical significance on realizing reasonable driving and lowering fuel consumption. Taking some light-duty diesel vehicle as experimental object, this paper discussed the fuel economy variation discipline and curves based on various coasting tests, especially analyzed the fuel consumption difference between sliding in neutral and sliding in different gears. The result shows that vehicle’s average fuel consumption rate while sliding in different gears is similar, which is about to 1/50 of sliding in neutral’. While sliding, the vehicle’s fuel consumption rate basically maintains at a low level. But once the coasting speed is too low, the fuel consumption rate increases dramatically. Therefore, aiming at lowing fuel consumption and reducing emission discharge, vehicle sliding in gear should have priority to sliding in neutral and choosing a reasonable coasting speed range is important.Keywordsdiesel vehicleenergy savingfuel consumption featurecoastingpolynomial fittinglinear regression analysisdriving behavior

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