Wedoany.com Report-Dec 18, Testing of digital automatic couplers (DAC) has commenced on Sweden’s heaviest freight train, the steel shuttle operating between Luleå and Borlänge.
The tests are part of the FP5 TRANS4M-R innovation project under Europe’s Rail Joint Undertaking (EU-Rail), focusing on the integration of DAC technology in challenging operational environments.
Challenging conditions for DAC performance
The Green Cargo steel shuttle, central to SSAB’s production chain, transports steel slabs from Luleå to Borlänge over a 1,000-kilometer route that includes Sweden’s northern main line, known for its curves, gradients, and harsh winter conditions. The train, with a weight of up to 3,800 tons and up to 40 wagons, presents an opportunity to test the durability and performance of DAC under extreme conditions.
Two wagon pairs have been fitted with DAC systems from different manufacturers for the testing phase. Over the two-year period, the wagons are expected to cover approximately 320,000 kilometers, providing data on how the couplers perform in severe winter conditions and demanding terrain.
Collaboration across industry stakeholders
The testing involves multiple stakeholders. Trafikverket oversees the testing process and prepares the demonstration train, while Rail Sweden at Lindholmen Science Park coordinates the project. Additional support is provided by Svensk Maskinprovning for measurements and test preparations. The current couplers have been supplied by Dellner and Voith, with additional suppliers and wagon pairs to be introduced as the project progresses.
Role of DAC in freight train modernization
Digital automatic couplers allow for automated coupling and decoupling of wagons while enabling electrification and data transfer throughout the train. This eliminates manual coupling tasks, a time-consuming and physically demanding process, and enhances operational safety. The technology also supports longer and heavier trains and enables automated brake testing, improving train readiness and operational efficiency.
European ambitions for DAC deployment
The FP5 TRANS4M-R project aligns with the European DAC Delivery Programme, which plans to expand the use of DAC-equipped trains across Europe by 2026–2027. The program is part of broader efforts to modernize rail freight operations, aiming to increase capacity, streamline cross-border coordination, and reduce the environmental footprint of freight transport.
This initiative contributes to the European Commission’s goals of shifting more freight to rail by leveraging new technologies, enhancing capacity, and improving the resilience of logistics networks.
