An experimental setup to study a hybrid drivetrain for a shunting locomotive

This paper presents a project for an experimental setup dedicated to the study of a hybrid traction drive for a shunting locomotive. Indeed, rail traction based upon hybrid technology is a very suitable solution for shunting locomotives, promising substantial benefits in terms of fuel savings, emissions and noise reductions. For instance, intensive tests carried out on various prototypes around the world demonstrated that the use of a hybrid locomotive, compared to a diesel equivalent with the same power, could save 40% to 70% of fuel, reduce NOx emissions up to 90%, reduce atmospheric particulate matter up to 70% and reduce CO2 emissions up to 60% while sulfur oxides would also decline. Significant reductions of noise and vibrations were also measured. Many companies have initiated projects on their own and developed prototypes but in most cases, information on these prototypes remains an industrial secret. To date, there is no unified approach or general theory for the hybrid traction principle applied to locomotives. The aim of the project presented in this paper is to lay the foundations for a general approach of a shunting locomotive hybrid drive train and its different components. The experimental setup will be there to confirm the theory. This research project gathers several partners who are in charge of different parts of the project.