• Title/Summary/Keyword: AEFR system

Search Result 2, Processing Time 0.017 seconds

Considerations on the Temperature Distributions and Gradients in the Filter During Regeneration in Burner Type Diesel Particulate Trap System (버너방식 DPF 시스템의 재생과정 중 발생하는 내부 온도분포 및 온도구 배에 관한 고찰)

  • 박동선;김재업;김응서
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.4 no.6
    • /
    • pp.78-84
    • /
    • 1996
  • In order to eliminate TPM(Total Particulate Matter) from a diesel engine, we designed and developed a particulate trap system using a burner, which was named as AEFR(Active Exhaust Feeding Regeneration) system. We have considered the temperature distributions and gradients in the filter being regenerated according to regeneration control schemes Ⅰ, Ⅱ and Ⅲ. Schemes Ⅲ has shown the most desirable peak temperature and temperature gradients in AFER system. Finally, it was concluded that much lower peak temperature and temperature gradients in the filter could be obtained than that of other advanced research results by our AEFR system.

  • PDF

An Experimental Study on the Control of the Combustion Rate by Temperature Control of Gas Entrained into the Filter in Burner-Type Particulate Trap (버너방식 DPF 시스템에서 가스온도 제어를 통한 입자상물질 연소율제어의 실험적 검증)

  • Park, D. S.;Kim, J. U.;Cho, H.;Kim, E. S.
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.5 no.4
    • /
    • pp.130-141
    • /
    • 1997
  • Work on the reduction of particulate matter(PM) from a diesel vehicl has led to a new trp system and a control method to control the combustion rate of the PM filtrated in the trap, which was named as 'Active Exhaust Feeding Regeneration(AEFR) System' by its operation mechanism. Ceramic cordierite filter is a major component of the trap and susceptible to thermal shock. Therefore the system should be designed to reduce the peak temperature and temperature gradients in the trap ; these have been considered to be the main factors causing thermal shock of the filter during the regeneration. It uses the engine's exhaust gas partially for the regeneration of the ceramic filter. It controlled bypass flow rate of the engine's exhaust gas precisely to control the temperature of the gas entrained into the filter. Gas temperatures were measured inside filter, and the oxygen concentration at the outlet of the filter was also monitored during the regeneration to analyze the combustion process of the PM. The temperature distributions and temperature gradients in the filter during the regeneration varied widely according to the regeneration control schemes. Finally, this system shows relatively low peak temperature and temperature gradients in the filter during its regeneration. It is considered that this system uses a mew method to control the combustion rate of the PM, which is different from the methods used in the previous studies.

  • PDF