Towards achieving a low-carbon or carbon-neutral society, we are working on the development of reciprocating engines that use hydrogen as a fuel or co-fuel. Our hydrogen co-firing engine products are continuously operable on city gas 13A with a 15 vol% blend of hydrogen. In regard to the burning of 100% hydrogen in engines, the engine's specifications and control parameters were determined based on the results of numerical simulation and single-cylinder engine testing. A trial run of a newly built hydrogen engine generator set is now underway using hydrogen as a fuel at our factory premises; the demonstration has completed the sequence of phases in operation on 100% hydrogen from engine start to power generation at a rated output (435 kW).
