Yanmar Energy Options, a subsidiary of Japan’s industrial diesel engine and equipment producer Yanmar Holdings, has obtained ship classification certification for its hydrogen-fueled four-stroke high-speed engine.
Yanmar Energy Options reported on January 27 that it had develop into the primary engine producer in Japan to acquire each the sort approval certificates and NOx certificates from Nippon Kaiji Kyokai (ClassNK) for its pilot-ignition hydrogen-fueled four-stroke high-speed engine for energy technology for home coastal vessels.
The corporate used a small quantity of hydrotreated vegetable oil (HVO) as a pilot gasoline throughout its land-based demonstration exams, whereas getting ready for deliberate demonstration operations.
Because of ClassNK’s inspection, the corporate obtained the sort approval certificates in October 2025 and the NOx certificates in December 2025, each required for demonstration operations.
The engine specs coated by these certifications are designated as “Electronically Managed Fuel Solely Engine (Hydrogen).”
Transferring ahead, Yanmar Energy Options will set up the mandatory tools, together with two hydrogen engines, onto home coastal vessels, previous to demonstration operation trials scheduled for this fall.
The event is a part of the Nippon Basis’s Zero Emission Ships Mission which focuses on the event of hydrogen-powered zero-emission vessels and helps associated know-how improvement.
Inside this framework, the consortium involving Yanmar Energy Options has been advancing hydrogen engine improvement, whereas additionally growing a hydrogen-compatible hybrid electrical propulsion vessel that mixes a hydrogen engine generator with batteries.
The vessel design incorporates a container unit-type hydrogen energy technology system on its higher deck. Uyeno Transtech, a transport firm below the Uyeno Group, is liable for the vessel’s improvement and building.
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