Biological Systems Engineering


Date of this Version



Published in Applied Engineering in Agriculture Vol. 20(5): 553−561. Copyright 2004 American Society of Agricultural Engineers. Used by permission.


Reports from the Nebraska Tractor Test Laboratory (NTTL) show improved fuel efficiency during the past 20 years. A 4.8% decrease in average annual specific volumetric fuel consumption for the data used in the ASAE Standards was shown. Using fuel consumption and power data from the NTTL reports, new equations for fuel consumption were established that predict fuel consumption for diesel engines during full and partial loads and under conditions when engine speeds are reduced from full throttle.