20. April 2026, 14:16 o'Clock
Article: Double traction control in diesel operation: Testing an extended solution at DB Cargo Hungária
First operational test period of double traction control in diesel operation to evaluate synchronisation and tractive output under real conditions.
DB Cargo Hungária is currently testing the use of double traction control in diesel operation. Two locomotives are coupled via an electrical wire connection and operated as one functional unit. The control commands are transmitted synchronously so that both vehicles react in the same coordinated manner. With this solution, a single train driver is able to control both locomotives simultaneously, delivering double performance with optimized resource usage. The aim is to validate the technical implementation, the interaction of the units under operational conditions, and to obtain the final approval for operation from the NSA. The focus here is on aspects such as control accuracy, power output and driving behavior.
This development creates the opportunity to further enhance operational flexibility within DB Cargo Hungária’s fleet of 19 diesel locomotives by introducing a double traction solution that relies on two units working in coordinated operation, thereby opening new possibilities such as ultra heavy shunting, special transport tasks and—where required—their deployment as traction units. In addition, the solution provides a reliable alternative for mainline operations on non electrified routes, strengthening overall operational resilience. However, this potential is currently still being tested and evaluated under real operating conditions.
With the current test phase, DB Cargo Hungária is creating the basis for the technical and operational evaluation and further development of double traction in diesel operation. The knowledge gained will serve as a basis for possible future applications in rail freight transport. In parallel with the development work, both locomotives involved in the trials underwent significant technical upgrades: a complete engine overhaul was executed on both units, one of them received a full gearbox overhaul, and both vehicles were equipped with a new air conditioning system in the driver’s cab to increase comfort and operational reliability.
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