Less fuel consumption, fewer emissions, less noise, lower costs – the hybrid drive technology for diesel powered rail vehicles which was jointly developed to market maturity by MTU Friedrichshafen GmbH and WITTENSTEIN promises to deliver all of that. The electric drives and the power electronics for the Hybrid PowerPack were contributed by WITTENSTEIN cyber motor.
A solution with future potential
Two electric motors with around 200 kW of continuous power output form a so-called parallel hybrid configuration together with the diesel engines, which deliver up to 390 kW. The vehicles can be driven by the diesel engines alone or run temporarily in pure electric mode or, for enhanced performance, using a combination of diesel engine and electric motor. The Hybrid PowerPack reduces diesel consumption by up to 25 per cent and NOx emissions by as much as 20 percent. Locomotives equipped with hybrid drives enable low-noise operations in railway stations – up to 21 decibels quieter than diesel trains. Finally, the use of hybrid technology allows nonelectrified branch lines to be operated more affordably and disused lines recommissioned if necessary without the high costs normally associated with electrification. This all adds up to enormous future potential for hybrid drive technologies.