Yanmar Unveils Hydrogen Engine for Zero-Emissions Coastal Vessels

Yanmar Power Technology recently completed a successful land-based demonstration test of a pilot-ignition hydrogen 4-stroke high-speed engine designed for power generation in coastal vessels. This innovative 6-cylinder engine utilizes a small amount of diesel oil as the ignition source, known as pilot fuel, to burn a premixture of hydrogen and air. According to Yanmar’s research, the engine achieved the world’s highest hydrogen fuel ratio and produced an output of approximately 500kW.

The company is also developing a pilot-ignition engine that aims to achieve zero emissions by co-firing a small amount of biofuel for ignition along with hydrogen, as well as a spark-ignition engine that will exclusively burn hydrogen. Land-based demonstration tests for the pilot-ignition 6-cylinder hydrogen engine are set to commence in 2024, with demonstration operations planned for 2026. This initiative is part of the Nippon Foundation’s zero emission ship demonstration experiment, which focuses on developing hydrogen-powered, zero-emission ships and supporting related technology development.

In addition to hydrogen engine development, the project includes work on a hydrogen engine-compatible hybrid electric propulsion vessel that combines hydrogen engine generators with batteries. The vessel’s design features a container unit-type hydrogen power generation system on its upper deck, with Uyeno Transtech overseeing the vessel’s development and construction. This project represents a significant step forward in the pursuit of sustainable and environmentally friendly maritime technology.

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