Title: Dynamic optimization method for design and rating of the components of a hybrid vehicle

Authors: U. Zoelch, D. Schroeder

Addresses: Institute of Electrical Drives, Technical University of Munich, 80333 Munich, Germany. ' Institute of Electrical Drives, Technical University of Munich, 80333 Munich, Germany

Abstract: The paper presents a new method for the optimal rating of the components of an autark hybrid driveline. The method uses dynamic optimisation to calculate the optimal torques for both motors and the optimal CVT gear ratios for a given driving cycle of the vehicle. The cost function for the optimisation uses among other things the fuel consumption, which has to be minimised. From the optimal torques and gear ratios, conclusions concerning the rating of the motors can easily be made. The methods derived are used for the TU Munich Hybrid Vehicle project. In this project, a parallel hybrid with an i²-CVT is under development.

Keywords: autark vehicles; continuously variable transmission; CVT; component design; component rating; driveline components; dynamic optimisation; hybrid vehicles; minimal fuel consumption; optimal torque; optimal gear ratios; hybrid electric vehicles; HEVs; vehicle design.

DOI: 10.1504/IJVD.1998.062090

International Journal of Vehicle Design, 1998 Vol.19 No.1, pp.1 - 13

Published online: 29 May 2014 *

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