Development of Meshwork DPF Catalyst for Fuel Economy Improvement

Paper #:
  • 2017-01-0925

  • 2017-03-28
Diesel particulate filter (DPF) has been an essential aftertreatment component for reducing particulate matter (PM) emission for diesel engine vehicles thereby meeting stringent emission regulations. Installation of DPF can achieve high filtration efficiency; however PM filtration causes high pressure drop due to deep bed filtration. Although periodic PM regeneration is needed for keeping low pressure drop, it causes significant deterioration in fuel efficiency. Improving the efficiency of PM regeneration and low pressure drop are major challenges for DPF to meet future CO2 emission regulations. In this paper, a novel morphological catalyst layer for DPF was presented. This catalyst layer located in wall surface of inlet DPF channels and formed highly porous and 3 dimension meshwork shape. These features enhanced not only preventing deep bed filtration for low pressure drop, but also soot-catalyst contact for fast PM regeneration rate. In addition to the above merit, the layer coating manipulation was general method. For pressure drop, transient conditions during PM loading and low/full throttle engine conditions with/without PM were evaluated. For PM regeneration, passive and active regeneration conditions were investigated. In addition, improvement effect on fuel economy was estimated. This novel catalyst showed significant low transient pressure drop. Coated meshwork catalyst provided almost the same pressure drop compared to bare substrate without PM loading and 25 % lower pressure drop with PM loading at both low/high throttle conditions. Moreover, improvement of 23 % higher PM regeneration rate, measured at active regeneration condition, was confirmed. Additionally, this catalyst proved remarkable improvement of fuel economy compared to conventional DPF in PM loading and regeneration cycles. The results of this work demonstrated that application of this novel catalyst not only improved fuel economy but also can extend the potential of multifunctional DPF.
Also in:
  • SAE International Journal of Fuels and Lubricants - V126-4
  • SAE International Journal of Fuels and Lubricants - V126-4EJ
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