• Title/Summary/Keyword: particulate trap system

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Conceptional Design and Basic Experiment of the Burner for the Particulate Trap System (디젤 입자상물질 제거장치에 적용되는 버너의 설계 개념 및 기초 실험)

  • 박동선;김재업;이만복;김응서
    • Transactions of the Korean Society of Automotive Engineers
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    • v.4 no.3
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    • pp.50-60
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    • 1996
  • We designed and developed the burner which would be adapted on the burner type diesel particulate trap system. The burner type particulate trap system consists of burner system to regenerate to ceramic filter, ceramic filter canister, system controller and etc. Many design factors which affect the performance of the burner system were discussed. We also investigated burner characteristics according to the operating parameters. Burned gas temperature could be controlled better by the 2nd air flow rate than the 1st one. As the space velocity increases, the axial and radial temperature gradients in the filter decreases.

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An Experimental Study on Thermal Regeneration of Filter Trap by Diesel Engine Performance and Characteristics of Exhaust Pipe (디젤기관의 성능과 배기관 특성에 의한 필터트랩의 열재생에 관한 실험적 연구)

  • 오용석
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.8 no.2
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    • pp.50-55
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    • 1999
  • The exhaust emissions from diesel vehicle are known to be harmful to human health and environment. Recently, one of the most environment problems is particulate matter. In this study, through the actual exper iment and heat transfer of exhaust pipe in light duty diesel engine equipped with the ceramic filter trap of throttling type, following results are obtained. 1. In case of light duty diesel engine equipped with ceramic filter trap of throttling type, Power and torque of engine were decreased about 5%, compared with the case without trap system. It means that was not so much effect on base engine performance.2. If the length of exhaust pipe when equipping with ceramic filter trap is suitably controlled, the range of regeneration will be expand much more.3. Particulate matter reduction efficiency of ceramic filter trap system was about 70%-80%, so it was proved a good system to reduce particulate matter.In experiment, test was conducted to estimate engine emission in 2,476cc light duty diesel engine which was equipped with ceramic filter trap.

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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
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    • v.4 no.6
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    • pp.78-84
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    • 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.

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Computational Simulation by One-Dimensional Regeneration Model of Wall-Flow Monolith Diesel Particulate Filter Trap (벽-유동(Wall-Flow) 모노리스(Monolith) 디젤 입자상물질 필터 트랩의 재생모델에 의한 수치 시뮬레이션)

  • Kim, G.H.;Park, J.K.
    • Transactions of the Korean Society of Automotive Engineers
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    • v.3 no.6
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    • pp.41-54
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    • 1995
  • A mathematical model for wall-flow monolith ceramic diesel particulate filter was developed in order to describe the processes which take place in the filter during regeneration. The major output of the model comprises ceramic wall temperature and regeneration time(soot reduction). Various numerical tests were performed to demonstrate how the gas oxygen concentration, flow rate and the initial particulate trap loading affect the regeneration time and peak trap temperature. The model is shown to b in reasonable agreement with the published experimental results. This model can be applied to predict the thermal shock failure due to high temperature during combustion regeneration process.

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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
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    • v.5 no.4
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    • pp.130-141
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    • 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.

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Effects of Regeneration Parameters on Oxidation of Particulate in a Diesel Particulate Trap System (디젤 입자상물질 후처리 장치에서 입자상물질의 연소에 미치는 재생 인자의 영향)

  • Kim, J. U.;Cho, H.;Kim, H. U.;Park, D. S.;You, C.;Kim, E. S.
    • Transactions of the Korean Society of Automotive Engineers
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    • v.6 no.2
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    • pp.168-177
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    • 1998
  • The effects of the regeneration parameters such as inlet gas temperature, space velocity, oxygen concentration of the exhaust gas, and initial particulate loading on the oxidation of the particulate inside ceramic cordierite filter have been investigated through an engine experiment. As the inlet gas temperature increases, the remarkable filter temperature occurs owing to the rapid combustion rate. Though the higher space velocity affirms the safe regeneration, it also requires much fuel consumption of the burner. For that reason, the space velocity should be compromised considering the fuel economy. The excessive accumulation of the particulate may cause undesirable regeneration temperatures inside filer even under the optimized regeneration condition. The inlet gas temperature should be selected to overcome the variation of the oxygen concentration which is inherent feature of the diesel engine. It is the most important factor in the regeneration control techniques.

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Analysis of Performance Characteristics on Diesel Engine with Aftertreatment and EGR System (후처리 시스템을 장착한 디젤엔진의 EGR 밸브 작동에 따른 성능 분석)

  • Park, Cheol-Woong;Choi, Young;Lim, Gi-Hun
    • Transactions of the Korean Society of Automotive Engineers
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    • v.18 no.5
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    • pp.124-129
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    • 2010
  • The direct injection (DI) diesel engine has become a prime candidate for future transportation needs because of its high thermal efficiency. However, nitrogen oxides (NOx) increase in the local high temperature regions and particulate matter (PM) increases in the diffusion flame region within diesel combustion. Therefore, the demand for developing hybrid system consist of exhaust gas recirculation (EGR) and aftertreatment system as well as diesel particulate filter (DPF) or lean NOx trap (LNT) should be applied. The variation of EGR rate due to the malfunction of EGR valve can affect not only the combustion stability of engine but also the performance of aftertreatment system. In this research, 2.0 liter 4-cylinder turbocharged diesel engine was used to investigate the combustion and emission characteristics for various operating conditions with EGR. While the fuel consumption was increased with increase of EGR rate, NOx emission was improved by maximum 90% at low speed, low load operating condition. To achieve combustion stability and reliability of aftertrearment system with minimum penalty in fuel consumption and emissions, the fault diagnosis of EGR malfunction must be employed.

A Study on the Characteristics of Pressure Drop and Regeneration of a Porous Seramic Pellet Filter for Diesel Particulate Trap (다공성 세라믹 펠렛을 포집재로 사용하느 매연여과장치의 배압 및 재생 특성에 관한 연구)

  • Kim, Hong-Suk;Cho, Guy-Back;Kim, Jin-Hyun;Jeong, Young-Il;Jeong, In-Su;Park, Jai-Koo
    • 한국연소학회:학술대회논문집
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    • 2003.05a
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    • pp.21-26
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    • 2003
  • Diesel particulate trap is a core technology for the reduction of PM from diesel vehicles This study presents the features and the characteristics of DPF system when using pellet type filters. In comparison with wall-flow filter, the pellet filter has the advantages of cracking free during regeneration and shape flexibility. Experiments are conducted in a test bench simulated as diesel engine exhaust condition. Pressure drop and particle loading rate was compared by using two pellet filters having the porosity of 70% and 0%. Also its regeneration was tested.

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Regeneration of Burner Type Diesel Particulate Trap System Through Active Exhaust Gas Feeding (배기 가스 유량 제어를 이용한 버너방식 디젤 입자상물질 제거 장치의 재생)

  • 김재업;박동선;이만복;김응서
    • Transactions of the Korean Society of Automotive Engineers
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    • v.5 no.1
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    • pp.1-13
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    • 1997
  • The key point that guarantees the durability of the ceramic monolith filter is to lower peak temperature and temperature gradient inside filter during regeneration. The control of the exhaust gas flow rate into the filter, by the bypass technique of the exhaust gas, enables the gas temperature in filter to be constant for regeneration. A couple of methods, which are the ON/OFF and PID control of the bypass valve, were used for feedback control of the gas temperature. These techniques showed that the ceramic filter was regenerated perfectly under the peak temperature and peak temperature gradient limitations for durability.

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A Study on the Performance of the Diesel Particulate Filter made of Porous Metal with Fe-based Fuel Additive (Fe 첨가제를 적용한 금속분말 필터의 포집 및 재생 특성에 관한 연구)

  • Park, S.H.;Chun, K.M.;Cho, G.B.;Jeong, Y.I.;Park, Y.L.
    • Proceedings of the KSME Conference
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    • 2001.06d
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    • pp.802-806
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    • 2001
  • Diesel particulate trap is the most reliable system to reduce the particulate matters from diesel engine. Filter is the core component of DPF and ceramic monolith type is dominantly used, which is expensive and fragile relatively at thermal shock. Porous metal filter, which has superior thermal characteristics and low cost, was tested in order to analyze the regeneration performance by using with ferrocene additive. This filter showed the 72% filtration efficiency, additives itself diminished 48% of PM from engine out emission, and final PM reduction ratio of 89% was achieved by DPF system with D-13 test mode.

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