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디젤 입자상물질 후처리 장치에서 입자상물질의 연소에 미치는 재생 인자의 영향
김재업(J.U.Kim),조훈(H.Cho),김형욱(H.U.Kim),박동선(D.S.Park),김응서(E.S.Kim) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
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 filter even under the optimized regeneration condition.<br/> 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.<br/>
버너방식 DPF 시스템에서 가스온도 제어를 통한 입자상물질 연소율제어의 실험적 검증
박동선(D.S.Park),김재업(J.U.Kim),현범용(B.Y.Hyeon),조훈(H.Cho),김응서(E.S.Kim) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
Work on the reduction of particulate matter(PM) from a diesel vehicle has led to a new trap system and a control method to control the combustion rate of the PM filtrated in the<br/> 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. Thus system was 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 regeneration. It uses the engine's exhaust gas p3.rtially for 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. also the oxygen concentration at the outlet of the filter was monitored during regeneration to study combustion of the PM. The temperature distributions and temperature gradients in the filter during 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 new method to control the combustion rate of the PM, which is different from the methods used by others.<br/>