Repowering is interesting: Renewing the driveline with modern ZF transmissions is an extremely attractive option for economic as well as environmental reasons.
Rising fuel prices are presenting rail operators with ongoing commercial challenges. Fuel costs for DMUs (Diesel Multiple Units) account for more than two thirds of the total vehicle life cycle costs (LCC). Ever greater importance is therefore attributed to low LCCs in combination with longer life cycles. An economical solution to these demands consists of repowering, i.e. replacing outdated inefficient hydrodynamic transmissions in older drivelines with more modern and cost-efficient driveline components.
ZF offers a series of solutions in this sector. These include repowering with the automatic reversing transmissions based on ZF-EcoLife and ZF-Ecomat. These tried and trusted automatic transmissions have been used worldwide in bus transport for many years already and have also been applied to rail vehicles. With extremely efficient torque converters, the transmissions provide very high comfort and optimum acceleration, possible because all gear changes are made without interruption to tractive force. Fine-stepped gear ratio always keep the engine in an economical speed range; the higher efficiency that can be found especially already at low vehicle speeds greatly reduces fuel consumption and fuel costs. Programmable and flexible ZF Electronic Control Units ensure integrating the complete driveline into the train is easy and thus the ideal interface to the train control unit.
ZF offers rail operators a range of axle-drive variants with and without reverse transmissions, and thus complete driveline packages. These combinations can reduce fuel consumption by up to 20 percent when compared to hydrodynamic transmissions.