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비분산 적외선 분광법을 이용한 Co<sub>2</sub>농도 고속 분석기의 Sampling Module 특성에 관한 실험적 연구
김우석,손덕영,박영무,유재석,이종화,Kim, Woo-Seok,Shon, Deok-Young,Park, Young-Moo,Yoo, Jae-Suk,Lee, Jong-Hwa 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.3
A fast response analyzer for measuring carbon dioxide concentration has been developed for transient characteristic and researches tested on internal combustion engine. The analyzer uses the well known NDIR(Non-Dispersive Infrared) method with miniaturized detection system, giving a time constant of approximately 30 microsecond, and sampling module consists of capillary tube. Since the transit time and the time constant of the sampling system depend on the sampling conditions, it is necessary to investigate the characteristics of sampling system before applied to exhaust gas measurement in engine. A unique method was designed to study the influence of the diameter of transfer sample line and operating conditions of the FRNDIR on transit time and time constant. A database of transit time and time constant was built up for different measured and simulated pressure conditions. The database can be used for correcting eventual $CO_2$ concentration measurement.
SI 엔진에서 고속 NDIR 분석법을 이용한 과도상태 CO₂ 농도와 A/F 측정
이석원(Sukwon Lee),김우석(Wooseok Kim),이종화(Jonghwa Lee),박진일(Jinil Park),유재석(Jaisuk Yoo) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
A fast response CO₂ analyzer has been developed to study transient characteristics of SI engine. The analyzer has 4.5 ms delay time and 2.8ms time constant, which is fast enough to measure CO₂ concentration on transient condition. Wide range of A/F ratio can be also estimated using the analyzer with an additional switch type oxygen sensor. The result of measurement of CO₂ concentration and A/F ratio on transient condition including rapid acceleration, rapid deceleration, and EGR on/off is presented and compared with commercial exhaust gas analyzer and UEGO sensor.
FT-IR을 이용한 정상휘발유와 유사휘발유의 엔진 성능 및 배기가스 특성에 관한 연구
김정환(Jeonghwan Kim),이민호(Minho Lee),김기호(Giho Kim),김재권(Jaigueon Kim),신성철(Seoungchul Shin) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
As the interest on the air pollution is gradually rising up at home and abroad, automotive and fuel researchers have been working on the exhaust emission reduction from vehicles through a lot of approaches, which consist of new engine design, innovative after-treatment systems, using clean fuels and fuel quality improvement. However, a study that the fuel quality affect on exhaust emission from vehicle. FT-IR spectroscopy, useful technology for simultaneous and continuous measurement of the various components of the automotive exhaust gas, is utilized to a few unregulated exhaust emissions measurement of the irregular gasoline fuel including the regulated exhaust emissions. This research shows that the irregular gasoline fuel had some problem that cause of ambient pollution, power decreasing, fallen to safety and trouble of engine. Also, based on these problem, this paper discusses the influence of gasoline quality on automotive exhaust emissions.