Parametrical study of a hybrid electric vehicle’s performances according to its use

Details

Supervisors

Fisette, Paul

Faculty

Ecole polytechnique de Louvain

Degree label

Master [120] : ingénieur civil électromécanicien

Abstract

"Hybrid vehicles are a transition before the tomorrow (electric) car." Although everyone knows more or less why, only a few could explain it rigorously, and almost nobody has already attempted to optimize one (except manufacturers who keep well their precious secrets). This master thesis proposes a global and rather complete modeling of the principle organs of a typical hybrid electric vehicle : from the electric traction motor, and the internal combustion engine to the wheels, passing by the trans- mission and energy supply systems. Coupled with a multibody system simulator (performed with the Robotran© suite), the behaviour and the performances of such a vehicle can be characterized and one can observe their variations with respect to key parameters modifications. Furthermore, this work is interested in the genetic optimization (with the CMA-ES) of a fully hybrid electric car according to its use. The results rejoin the intuition that an energetically economical car has to be equipped with a larger electric motor to be able to recover more energy whereas a larger internal combustion engine is preferred in sportive applications to take advantage of a smaller mass-to-power ratio.