Japan Engine Corp. develops world's first hydrogen engine for large ships

Japan Engine Corp. has developed what it claims is the world's first hydrogen-powered engine designed for large commercial vessels. The technology is capable of reducing carbon dioxide emissions by more than 95 percent compared to conventional heavy fuel oil engines.

The engine utilizes a high-pressure direct injection system to ensure stable hydrogen combustion. To address the highly flammable nature of hydrogen and the risk of leaks, the design incorporates safety measures such as double-walled piping for fuel supply lines.

The engine will be installed on a multipurpose ship constructed by Onomichi Dockyard Co., with Mitsui OSK Lines Ltd. scheduled to begin onboard demonstration testing in April 2028. This development follows the company's completion of the world's first full commercial ammonia-fueled engine in August last year. While hydrogen and ammonia are viewed as primary candidates for next-generation maritime fuels, challenges remain regarding high production costs for hydrogen and the toxicity of ammonia. These innovations align with the International Maritime Organization's goal of achieving net-zero greenhouse gas emissions by 2050.