Fuel consumption estimation

Abstract

Method and apparatus for prediction or estimation of fuel or energy consumption by a vehicle over a chosen trip route, where the route includes a plurality of road segments. Fuel consumption over each road segment is estimated, using information on one or more of the following variables: representative altitude of the road segment; representative slope of the road segment; estimated vehicle average speed along the road segment; length of the road segment; condition of the road segment; condition of the vehicle tires; expected vehicle traffic density along the road segment; applicable constraints on vehicle operation along the road segment; expected ambient weather conditions along the road segment; vehicle accessories that will be used; and vehicle driver profile information. Weather conditions enroute, such as local wind speed and direction, can be measured and used to enhance accuracy of predicted fuel consumption. Fuel consumption can be estimated initially, can be re-estimated enroute, using actual fuel consumption for the portion of the route already traveled, and can be estimated for a return trip along the same route. Fuel consumption can be estimated where the route is not initially specified. The fuel consumed may be electrical charge, gasoline, kerosene, natural gas, diesel fuel, or any similar fuel.