Abstract
This paper investigates the benefit of using a 3D road geometry based optimal powertrain control system in reducing the fuel consumption of heavy trucks. The Optimal Control (OC) system, using constrained Nonlinear Programming (NLP), is designed to predict the optimal throttle, gear shifting and velocity trajectory, to minimise the fuel consumption and travel time. Experimental tests of a Class 8 truck are conducted with GIS 3D road geometries. Test results show that the OC system is able to significantly reduce the fuel consumption with small travel time increasing on level and rolling terrains, and gain small fuel saving on mountainous terrain, when compared to the defined baseline.
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