Evaluation of the efficiency improvement potential of diesel multiple unit railcars by the use of an electrical power split hybrid drive

Conference: Antriebssysteme 2017 - 7. VDE/VDI-Fachtagung
11/22/2017 - 11/23/2017 at Karlsruhe, Deutschland

Proceedings: ETG-Fb. 154: Antriebssysteme 2017

Pages: 6Language: englishTyp: PDF

Personal VDE Members are entitled to a 10% discount on this title

Hoffmann, Hendrik; Jacobs, Georg; Kramer, Achim; Pelger, Christian (Institute for Machine Elements and Machine Design, RWTH Aachen University, Aachen, Germany)

This paper discusses an innovative hybrid drive for diesel multiple unit railcars. The new drive aims at reducing fuel consumption as well as enabling an emission-free operation around railway stations and on tunnel sections of non-electrified railways. By using an electrical power split transmission structure, the new drive benefits from the high efficiency of mechanical transmissions and offers the possibility of a continuously variable transmission. Furthermore, the new transmission structure can be switched between a pure electrical and a diesel-powered electrical power split mode. The new hybrid drive is compared to a diesel-electric drive. For this purpose, simulation models are developed and drive cycle simulations are performed. The simulation results indicate fuel savings of up to 32 % for the considered route characteristics and show a decrease of the required electric drive power of 50 %. Keywords: DMU, hybrid drive, electrical power split transmission, fuel consumption, emission- free operation