DUAL-FUEL DIESEL ENGINE

摘要

An object is to, in a low-load operating range of a dual-fuel diesel engine or a dual-fuel diesel engine unit including a plurality of the dual-fuel diesel engines, reduce the amount of injection of oil fuel so as to make it possible to make exhaust gas less harmful and to reduce fuel cost. On a cylinder head 14, a plurality of dual-fuel injectors 24a, 24b are disposed, each of which having a gas fuel injector 26 that injects a gas fuel being a main fuel and a pilot fuel injector 28 that injects an oil fuel "o". In a low-load operating range where it is not necessary for the dual-fuel injectors 24a, 24b to inject fuel at the same time for ignition, fuel is injected alternately from the dual-fuel injectors 24a, 24b and combusted in every single combustion cycle. As a result, it is possible to halve the amount of injection of oil fuel in the low-load operating range.