Marine engine manufacturer Everllence has unveiled its new two-stroke ammonia dual-fuel engine for ship applications.
The design builds on the firm’s existing dual-fuel platforms for methanol and LPG, with added containment, ventilation, sensors and double-walled piping tailored for ammonia.
Development work has included more than 800 ammonia engine tests since 2023, carried out in Copenhagen and Japan.
The engine will also feature digital connectivity, enabling real-time data flow to Everllence’s shore-based monitoring centres to support operational optimisation.
Dr Uwe Lauber, CEO of Everllence, said: “As the maritime industry’s leading engine designer, we are in a unique position to advance the green transition and know that bringing new fuels to market is not just innovation – it’s imperative for zero-carbon shipping. In this context, ammonia is a vital piece of the puzzle.
The first dual-fuel ammonia engine is due in Q1 2026, with pilot projects underway at Eastern Pacific Shipping, Höegh Autoliners and in Japan.
Bjarne Foldager, Head of Two-Stroke Business, said: “This ammonia engine is truly a technological milestone. It is the result of over 150,000 hours of collective work and represents a significant financial investment on our part… we are confident that this responsible approach will ultimately deliver the market gold-standard in ammonia engines.”
