Advisory system for economic vehicle operation

摘要

An intelligent advisory system is disclosed that uses fuzzy rule-based logic to guide a vehicle driver in selecting an optimal driving strategy to achieve best fuel economy. The advisory system includes separate controllers 60, 62 for providing advisory information regarding driver demand for power and advisory information regarding vehicle braking both of which are conveyed to the driver. The vehicle is typically a parallel hybrid vehicle having planetary gearing (26 see fig 1), an electric motor (40 see fig 1), a generator (38 see fig 1), an engine (12 see fig 1) and a powertrain controller comprising a transmission control module (14 see fig 1). The powertrain controller coordinates power delivery through transmission gearing. Engine speed may be determined by reaction torque acting on the generator (38).