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밀러사이클 적용 스파크점화기관의 후기 흡기밸브 닫힘각 변화에 따른 연소성능 연구A Study on Combustion Characteristics of Spark-Ignited Engine with Different Late Intake Valve Closing for Miller Cycle
- Other Titles
- A Study on Combustion Characteristics of Spark-Ignited Engine with Different Late Intake Valve Closing for Miller Cycle
- Issue Date
- Sep-2015
- Publisher
- 한국액체미립화학회
- Keywords
- 밀러 사이클; 가변밸브 개폐시기; 후기 흡기밸브 닫힘; 캠 형상; Miller cycle; Variable valve timing; Late intake valve closing; Cam profile
- Citation
- 한국액체미립화 학회지, v.20, no.3, pp.141 - 148
- Journal Title
- 한국액체미립화 학회지
- Volume
- 20
- Number
- 3
- Start Page
- 141
- End Page
- 148
- ISSN
- 1226-2277
- Abstract
- In order to research engine characteristics of spark-ignited engine with intake valve closing timing change for Miller cycle, two cam for LIVC(Late Intake Valve Closing) were designed and fabricated an prototype valvetrain. And intake valve closing timing were adjusted to build low compressing and high expansion cycle for HEV. In experimental study, it were investigated with different engine speed, spark timing and air-fuel ratio to compare base cam and LIVC cam type. It was found that the volumetry efficiency and effective work of compression process were decreased in case of LIVC cam. When compared with the existing results, the maximum pressure in the cylinder was reduced about 12~13 bar and the volumetric efficiency was reduced about 16%.
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Related Researcher
- Lee, Jin wook
- College of Engineering (School of Mechanical Engineering)