Everllence has introduced its new dual-fuel ME-LGIA (liquid gas injection ammonia) two-stroke engine to the maritime sector.
The new engine has been presented at an event in Copenhagen, which was attended by over 300 industry participants.
Everllence said that the ME-LGIA engine employs both the Diesel principle and dual-fuel Liquid Gas Injection technology. It builds on features found in the firm’s previous methanol and LPG models, while incorporating additional safeguards specific to ammonia.
The ME-LGIA engine includes engineering changes to handle ammonia’s specific chemical properties.
Safety measures for ammonia operation include engineered containment, monitoring sensors, dedicated system ventilation, and double-walled fuel lines.
Everllence has confirmed that initial delivery of the ME-LGIA is set for the first quarter of 2026, with bedding-in scheduled for late 2025.
Current pilot deployments encompass two very large ammonia carriers for Eastern Pacific Shipping, four units allocated to Höegh Autoliner vehicle carriers, and an installation on a bulk carrier in Japan where it is undergoing testing on the MITSUI E&S testbed.
The full sales release of the ME-LGIA will initially include bore sizes G50, S50, S60, G60, G70, and G80. Retrofit options will also be offered at a later stage.
The engine’s integration with digital connectivity allows for continuous data flow from shipboard sensors to Everllence’s onshore analytics systems.
This infrastructure is said to support operational data analysis in real time, remote diagnostics, and optimisation of engine parameters according to live feedback.
According to Everllence, these capabilities are intended to facilitate more efficient vessel operation and support emissions reduction as alternative marine fuels enter commercial use.
Everllence CEO Dr Uwe Lauber 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.”
Ammonia does not generate CO2 emissions during combustion and produces low sulphur oxide and particulates, said Everllence.
It also offers a higher volumetric energy density than hydrogen and can be stored as a liquid at moderate pressures. This storage profile enables integration into existing bunkering infrastructure with fewer modifications.
Its slow combustion velocity aligns with requirements for two-stroke engines commonly used in large oceangoing ships.
Existing global supply chains for ammonia production further support its adoption as marine fuel, with both electrolytic green ammonia projects and blue-ammonia facilities already online.
Everllence two-stroke business head Bjarne Foldager 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.
“Since two-stroke engine testing on ammonia started in July 2023, we have carried out over 800 tests – both here in Copenhagen and at MITSUI E&S in Japan.”
