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RISS 인기검색어
- 검색키워드
- 저자 : 홍명석(Myungsuk Hong) (검색결과 2 건)
- 무료
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SI엔진에 있어서 냉간 시동시 총탄화수소 배출물 저감을 위한 시스템 개발
김종일(Jongil Kim),손정배(Jeongbae Son),홍명석(Myungsuk Hong),차정연(Jeongyeun Cha) 한국자동차공학회 2001 한국자동차공학회 Workshop Vol.2001 No.-
It is well known that unburned hydrocarbons are abundantly emitted into the atmosphere at cold start in SI engine. Many nations tend to enforce regulations of emission much more strictly. This study was conducted to develop a system which reduces HC emissions at cold start using the device of temporary storage and recombustion after analyzing the emission characteristics of hydrocarbons during the cold start. The exhaust gas measurements are focused upon the first 30 seconds of operation after starting, with the engine and coolant initially at ambient temperature because this period has a major effect on HC emissions, over the FTP cycle. The engine examined is a 4-cylinder, 16-valve SI engine. K type thermocouples attached on the O2 sensor, the catalytic converter and the coolant, and each sensor for the engine were connected to the AfD board to find the parameters for storage time and recombustion mode. The emissions were initially enriched in light fuel alkanes and depleted in heavy aromatic species. It was decided that the maximum storage time was 30 seconds at cold start. The time for storage was decreased with warmed start because the 02 sensor's conversion at warmed start is much faster than that at cold start. The recombustion mode was selected by using the rate of throttle valve, engine speed, and operation conditions of purge solenoid valve to avoid engine torque Ouctuation.
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냉간 시동시 zero emission 을 위한 EGSR(exhaust gas storage and recombustion) System
차정연(Jeongyeun Cha),손정배(Jeongbae Son),김종일(Jongil Kim),홍명석(Myungsuk Hong) 한국자동차공학회 2001 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
It is well known that unburned hydrocarbons are abundantly emitted into the atmosphere at cold start in SI engine. Many nations tend to enforce regulations of<br/> emission much more strictly. This study was conducted to develop a system which reduces HC emissions at cold start using the device of temporary storage and recombustion. The measurements are focused upon tile first 30 seconds of operation after starting. with the engine and coolant initially at ambient temperature because tins period has a major effect on HC emissions, over the FTP cycle. The engine examined is a 4-cylinder. 16-valve SI engine. K type thermocouples attached on the O2 sensor, the catalytic converter and the coolant, and each sensor for the engine were connected to the AID board to find the parameters for storage time and recombustion mode. The emissions were initially enriched in light fuel alkanes and depleted in heavy aromatic species. It was decided that the maximum storage time was 30 seconds at cold start. The time for storage was decreased with warmed start because the O2 sensor's conversion at warmed start is much faster than that at cold start. The recombustion mode was selected by using the rate of throttle valve and engine speed to avoid engine torque fluctuation.<br/> <br/> <br/>
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