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실혐계획법을 이용한 배기 밸브시트링 설계인자의 영향도 파악 및 형상 최적화
곽영홍(Younghong Kwak),김영남(Youngnam Kim),손진욱(Jinwook Son),김홍집(Hongjip Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The performance of gasoline engine is mainly determined how effectively intake the fresh air and exhaust the burnt gases through intake port and exhaust port. As shown in many previous researches, the intake and exhaust process take its main rules in gasoline engine development. In this papers, we scrutinize the influences of design parameters of exhaust valve seat ring using orthogonal array adopting the robust design method. We use the L? orthogonal array and experiment the exhaust flow bench test to get the optimized design parameter combination in exhaust valve seat ring. Through this study, we scrutinized the influences of each valve seat ring design parameters and improved the exhaust flow coefficient about 5%.
정동원(Dongwon Jung),이병석(Byeongseok Lee),손진욱(Jinwook Son),우수형(Soohyung Woo),김영남(Youngnam Kim),오희창(Heechang Oh),한동희(Donghee Han) 한국연소학회 2019 KOSCOSYMPOSIUM논문집 Vol.2019 No.5
This study demonstrates on the technologies for the development of gasoline engine to improve brake thermal efficiency. All experiments have been conducted for stoichiometric operation at 2000RPM. The test engine is a four-cylinder 2.2L GDI engine, which has a long-stroke concept (102mm stroke and 79mm bore). The effects of compression ratio, EGR rate, the number of spark plugs, tumble ratio and super charger were explored. As a result, the maximum brake thermal efficiency can be achieved up to 44.6%.