분사방식에 따른 단실린더 수소기관 성능 및 배출가스 특성에 관한 연구

As an alternative energy in future hydrogen has been attracted since it might be a long-term solution to the limited global fossil energy. In particular, in automobile industries the technology of hydrogen fueled engine can bridge hybrid or fuel cell vehicles, and hydrogen fuel gives merits in wide ranges of combustion, improved thermal efficiency, close to zero harmful emissions except NOx and improved compression ratio by a higher octane number of hydrogen fuel itself. Despite many researches have conducted actively on the technique of directly injected hydrogen fuel rather than a pre-mixed type in order to reduce emissions and improve a power and response of combustion control, so far there are few comparison study on the performance and emission characteristics among direct injection and pre-mixed hydrogen engines and gasoline engines. This research aims to provide fundamentals of performance and emission characteristics between direct injection and pre-mixed type hydrogen engines comparing with gasoline engines, and may contribute in the development of a hydrogen engine in future.