| 摘要 |
PROBLEM TO BE SOLVED: To decrease a liquid fuel injection amount, and to achieve low environmental pollution by exhaust gas and reduction in a fuel cost, in the low load operation region of a dual-fuel diesel engine or a dual-fuel diesel engine unit including a plurality of dual-fuel diesel engines.SOLUTION: A cylinder head 14 is provided with a plurality of sets of dual-fuel injection devices 24a, 24b comprising a gaseous fuel injector 26 that injects gaseous fuel which is the primary fuel, and a pilot fuel injector 28 that injects liquid fuel o. In a low load operation region where there is no need to simultaneously inject and then ignite fuel from the dual-fuel injection devices 24a, 24b, fuel is injected alternately from the dual-fuel injection devices 24a, 24b and then ignited for each combustion cycle. As a result, the liquid fuel injection amount in the low load operation region can be reduced by half. |
