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배기관 내 압력 변동 분석에 의한 가솔린 기관의 실화 검출
심국상(Kooksang Sim),복중혁(Junghyock Bok),김세웅(Sewoong Kim) 한국자동차공학회 1999 한국 자동차공학회논문집 Vol.7 No.5
This paper describes the method for detection of the misfired cylinder by analysis of the variation of pressure occurred in exhaust manifold on an MPI gasoline engine. Misfired cylinder(s) cause a loss of power, an increase of fuel consumption and exhaust emission and vibration is caused by unsteady torque. Therefore early detection and correction of misfired cylinder(s) play a very important role in the proper performance and the exhaust emission.<br/> The method is a comparison of integration pressure index during the period of a blowdown in the displacement period. Experimental results showed that the method, using the variation of pressure in the exhaust manifold is proven to be effective in the detection of single cylinder or multiple cylinders misfire on the gasoline engine regardless of the engine revolutions. In addition, this method, using the variation of pressure in the exhaust manifold is a very easy and accurate method compared with other methods.
[가솔린엔진부문] 배기 압력 상승률을 이용한 실화 검출
최민호(Minho Choi),심국상(Kooksang Sim),김세웅(Sewoong Kim) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_1
This paper proposes a method to detect the misfired cylinder using Exhaust Pressure Ascent Rate.<br/> If a misfire occurs, the engine will be lost some power and consumes the more fuel and the torque will be unsteady. Most of all, the misfire affects a bad influence of the 3-way catalyst and emits unburned hydrocarbon in the air.<br/> To prevent these unusual phenomena and eliminate the factor of the environmental pollution. It is an important thing to detect the misfired cylindere.<br/> Experimental results showed that the method using the exhaust pressure ascent rate is proven to be effective in the detection of misfired cylinder on gasoline engine regardless loads and revolutions of the engine<br/>
김세웅(Sewoong Kim),최민호(Minho Choi),심국상(Kooksang Sim) 한국자동차공학회 2003 한국 자동차공학회논문집 Vol.11 No.2
This paper proposes a method to detect misfired cylinders by the exhaust pressure ascent rate. The misfire is generated by faults of electric system or faults of fuel delivery system. It is one of the abnormal combustions. Therefore, it increases the unburned hydrocarbon and the carbon monoxide and affects a bad influence to the 3-way catalyst. The misfire causes to decrease the power of the engine and increase the consumption of the fuel. Early detection and correction of the misfired cylinders can prevent these unusual phenomena. The misfired cylinders can be detected by the comparison of exhaust pressure ascent rate during each cycle. The exhaust pressure ascent rate is defined as pressure rise per time. Our experimental results showed that the proposed method is effective in the detection of the misfired cylinders on a gasoline engine regardless loads and revolutions of the engine.<br/>