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A Study on the Comparison of the Combustion Characteristics between a Small HSDI and an IDI Diesel Engine by Advanced One-zone Heat Release Analysis  

Lee, Suk-Young (부산대학교 기계공학과 대학원)
Jeong, Ku-Seop (진주국제대학교 자동차공학부)
Jeon, Chung-Hwan (부산대학교 기계공학부 기계기술연구소)
Jang, Young-June (부산대학교 기계공학부 기계기술연구소)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.12, no.6, 2004 , pp. 46-53 More about this Journal
Abstract
Heat release analysis is a very important method for understanding the combustion phenomena inside an engine cylinder. In this study, one-zone heat release analysis was used with the measured cylinder pressures of a HSDI(high speed direct injection) and IDI(indirect injection) diesel engines, Those have benefits of simple equation, fast speed, reliability. The objective of the study is to compare the combustion characteristics between a HSDI and an IDI. The result shoes that the maximum heat release rate of a HSDI is higher than that of an IDI because of long ignition delay period. The heat release curve of an IDI is more linear than that of a HSDI, thus is similiar to that of a SI engine. The combustion efficiency of a HSDI is higher than that of an IDI because of the smaller heat transfer loss of a HSDI. There is a suggestion here that an IDI engine has broad heat transfer area which include two combustion chambers, the connection passage of combustion chambers, etc.
Keywords
One-zone heat release; HSDI diesel engine; IDI diesel engine; Crevice volume; Specific heat ratio;
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