Emissions data was also encouraging, with ammonia emissions below 10ppm and N2O below 3ppm. NOx emissions for ammonia operation were well below those generated during diesel use.
A 52-bore single-cylinder version of the X-DF-A engine is running at the company's Engine Research and Innovation Centre (ERIC) in Winterthur, with final validation to be completed in time for the first engine deliveries in June 2025.
Swiss marine power company WinGD has introduced an option for its X-DF-A ammonia-fuelled engines to be delivered capable of running on liquified petroleum gas (LPG).