This content is not included in your SAE MOBILUS subscription, or you are not logged in.
A Filtration System for High-Pressure Loop EGR
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 12, 2011 by SAE International in United States
Annotation ability available
Cooled exhaust gas recirculation (EGR) is widely applied in modern diesels to effectively control nitric oxides (NOx) emission. However, unfiltered high-pressure loop EGR leads to EGR cooler fouling and loss of its effectiveness. Reduced EGR cooler effectiveness often leads to increased NOx emission through increased intake charge temperature and/or reduced EGR flows. Therefore, there is a desire to avoid EGR cooler fouling and its associated problems. Filtering the EGR upstream from the EGR cooler is considered a potential solution to preserve EGR cooler effectiveness over long operating periods and simplify the control of the EGR system. The effect of EGR filter filtration efficiency on the EGR cooler effectiveness was investigated at Southwest Research Institute (SwRI). Alantum, a filter manufacturer from Korea, developed EGR filters having 50 and 70 percent filtration efficiency for this study. A 2008 calibration, V8, A350 International diesel engine was used in this work. A continuous 30-hour test was conducted for each of the three configurations: the baseline configuration (without an EGR filter), with 50 percent, and 70 percent filtration efficiency filter. The EGR cooler effectiveness, pressure drop across the EGR filter and the cooler, EGR flow rate, and real-time filtration efficiencies of EGR filters are presented in this paper.
CitationLu, Q., Khair, M., Lee, J., Lee, S. et al., "A Filtration System for High-Pressure Loop EGR," SAE Technical Paper 2011-01-0413, 2011, https://doi.org/10.4271/2011-01-0413.
- Hoard, J. Abarham, M. Styles, D. Giuliano, J.M. et al. “Diesel EGR Cooler Fouling,” SAE Int. J. Engines 1 1 1234 1250 2008 10.4271/2008-01-2475
- Hoard, J. Giuliano, J. Styles, D. “EGR Catalyst for Cooler Fouling Reduction” CLEERS Workshop Dearborn, MI May 2007
- Mulenga, M.C. Chang, D.K. Tjong, J.S. Styles, D. “Diesel EGR Cooler Fouling at Freeway Cruise,” SAE Technical Paper 2009-01-1840 2009 10.4271/2009-01-1840
- Styles, D. et al. “The Impact of PM and HC on EGR Cooler Fouling” DEER Conference Dearborn, MI August 2009
- Khair, M. K. “Exhaust Gas Recirculation Filtration System” US Patent 6,474,060
- Zhan, R. Eakle, S.T. Miller, J.W. Anthony, J.W. “EGR System Fouling Control,” SAE Int. J. Engines 1 1 59 64 2008 10.4271/2008-01-0066
- Khair, M. K. Lu, Q. “Exhaust Gas Recirculation Filtration System Development” SwRI Technical Report September 2009