Domestic Journal


Title배충식, 장진영, 염기태, “Dimethyl Ether 예혼합 압축 착화 엔진에서 흡기중 CO2 농도와 흡기온도 변화가 연소에 미치는 영향”, 대한기계학회 논문집, vol. 31, No. 6, p514-521, 2007. 6.

배충식, 장진영, 염기태, “Dimethyl Ether 예혼합 압축 착화 엔진에서 흡기중 CO2 농도와 흡기온도 변화가 연소에 미치는 영향”, 대한기계학회 논문집, vol. 31, No. 6, p514-521, 2007. 6.

Abstract

This study focused on the effects of the CO2 gas concentration in fresh charge and induction air temperature on the combustion characteristics of homogeneous charge compression ignition with dimethyl ether (DME) fuel, which was injected at the intake port. Because of adding CO2 in fresh charge, start of auto-ignition was retarded and burn duration became longer. Indicated combustion efficiency and exhaust gas emission were found to be worse due to the incomplete combustion. Partial burn was observed at the high concentration of CO2 in fresh charge with low temperature of induction air. However, indicated thermal efficiency was improved due to increased expansion work by late ignition and prolonged burn duration. Start of auto-ignition timing was advanced with negligible change of burn duration, as induction air temperature increased. Burn duration was mainly affected by oxygen mole concentration in induction mixture. Burn duration was increased, as oxygen mole concentration was decreased.

Previous염기태, 배충식, “가솔린과 LPG 예혼합 압축 착화 엔진의 노킹 특성”, 한국자동차공학회 논문집, vol. 15, No. 3, pp54-62, 2007. 5.
Next문석수, 최재준, 배충식, “팬형분무의 초기입자분포 및 주변조건에 따른 입자분포의 변화”, 대한기계학회 논문집 B권, vol. 31, No. 7, pp611-619, 2007.
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