| 제목 |
가솔린 직접분사식 HCCI 엔진의 혼합기 제어에 의한 연소 및 배기 특성에 관한 실험적 연구 |
| 분야 |
엔진 및 연소 |
| 언어 |
Korean |
| 저자 |
김형민(한양대학교), 이기형(한양대학교), 류재덕(한양대학교) |
| Key Words |
HCCI(예혼합 압축착화), Cool flame(냉염), Split injection(2단분사), Two-stage ignition(2단연소), Strati fication charge(성층혼합기), Homogeneous charge(균일혼합기), ROHR(열발생률) |
| 초록 |
As the environmental pollution becomes serious global problem, the regulation of emission exhausted from automobiles is strengthened. Therefore, it is very important to know how to reduce the NOx and PM simultaneously in diesel engines, which has lot of merits such as high thermal efficiency, low fuel consumption and durability. By this reason, the new concept called as Homogeneous Charge Compression Ignition(HCCI) engines are spotlighted because this concept reduced NOx and P.M. simultaneously. However, there is trade off between output and NOx in a HCCI engine. In this study, output and emission characteristics for a gasoline direct injection type HCCI engine were investigated to clarify the effects of intake air temperature, injection time and mixture formation. From these experiments, we found that the smoke was not produced when the fuel was injected earlier than BTDC 90°. In addition, the output was increased because of delay of ignition time and NOx emission was decreased because of homogeneous charge of first injection in case of split injection. |
| 원문(PDF) |
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