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Fast Light-Off of Catalyst using Cranking Exhaust Gas Ignition

  • 조용석 (국민대학교 자동차공학전문대학) ;
  • 엄인용 (국민대학교 자동차공학전문대학원) ;
  • 이윤석 (국민대학교 자동차공학 전문대학원) ;
  • 김득상 (국민대학교 자동차공학전문대학원) ;
  • 김충식 (국민대학교 자동차공학전문대학원) ;
  • 천준영 (국민대학교 자동차공학전문대학원) ;
  • 최진욱 (국민대학교 자동차공학전문대학원)
  • 발행 : 2001.05.01

초록

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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