Longitudinal vehicle's dynamics, energy consumption and performance modeling of sport cars

Abstract

This master’s thesis is made in partnership with Automobili Lamborghini. This work presents a longitudinal vehicle dynamics simulation tool oriented towards the sports cars. The simulation tool must be used with a few inputs for non-existing and existing car giving the fuel consumption over the cycles and acceleration times. The focus is made on the engine and more precisely on the distinction between indicated mean effective pressure, brake mean effective pressure and friction mean effective pressure where this pressure is divided into its two major parts. The first part being the mechanical friction and the second one being the pumping losses. The FMEP and IMEP allows the oil temperature to be taken into account to enhance the accuracy of the model. The ISFC map is used in place of the traditional use of the BSFC to compute the fuel consumption. The relative impact of elements like the drag, the efficiency of the engine, the efficiency of the gearbox, the oil viscosity, etc are taken into account. This work is the first brick of a larger internal project at Lamborghini where the goal is to simulate the fuel consumption and the time of a non-existing car around any track.