• Title/Summary/Keyword: CEGI 시동 배기가스 점화

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Fast Light-Off of Catalyst using Cranking Exhaust Gas Ignition (시동 배기가스 점화기술을 이용한 촉매의 예열시간 단축)

  • 조용석;엄인용;이윤석;김득상;김충식;천준영;최진욱
    • Transactions of the Korean Society of Automotive Engineers
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    • v.9 no.2
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    • pp.43-49
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    • 2001
  • In order to satisfy the ULEV emissions regulation, fast light-off of a catalyst is essential for reduction of HC and CO emissions during the cold start. Cranking Exhaust Gas Ignition(CEGI) method developed in this study showed that the catalyst reaches the light-off temperature in a few seconds. The CEGI stops the ignition signal for a few seconds during the cranking period, so the unburned fuel-air mixture bypasses the combustion chamber and flows through the exhaust manifold. When the unburned mixture reaches two glow plugs installed upstream of the catalyst, it burns and releases the thermal energy to heat up the catalyst, In the FTP-75 vehicle tests, the CEGI showed that the exhaust emissions reduced by 47.7% for THC and by 88.6% for CO in the cold-transient phase of the test.

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Exhaust Emissions Reduction using Unburned Exhaust Gas Ignition Technology and Hydrocarbon Adsorber (미연 배기가스 점화 기술과 탄화수소 흡착기를 이용한 배기저감)

  • Kim, C.S.;Chun, J.Y.;Choi, J.W.;Kim, D.S.;Lee, Y.S.;Kim, I.T.;Ohm, I.Y.;Cho, Y.S.
    • Proceedings of the KSME Conference
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    • 2000.11b
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    • pp.150-155
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    • 2000
  • Exhaust emissions from vehicles are the main source of air pollution. Many researchers are trying to find the way of reducing vehicle emissions, especially in the cold transient period of the FTP-75 test. In this study, UEGI (Unburned Exhaust Gas Ignition) technology, warming up the close-coupled catalytic converter (CCC) by igniting the unburned exhaust mixture using two glow plugs installed in the upstream of the catalyst, was developed. It was applied to an exhaust system with a hydrocarbon adsorber to ensure an effective reduction of HC emission during the cold start period. Results showed that the CCC reaches the light-off temperature (LOT) in a shorter time compared with the baseline exhaust system, and HC and CO emissions are reduced significantly during the cold start.

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