Analyses of Thermal Shock Failure on Large Volume DPF

Kitagawa, Jun; Hijikata, Toshihiko; Makino, Mikio

doi:10.4271/900113

Cited by 15 publications

(3 citation statements)

References 5 publications

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“…The constants b 1 and b 2 , therefore, need only be found once for each filter microstructure under investigation. The constants b 1 and b 2 can found by curve fitting the predicted filtration efficiency using equation (13) to temporal filtration efficiency data from a filter loading on a real engine. An example of these data is shown in Fig.…”

Section: Pm Distributionmentioning

confidence: 99%

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Analysis and optimization of gel-cast ceramic foam diesel particulate filter performance

Williams

Garner

Binner

2008

Proceedings of the Institution of Mechanical Engineers, Part D:

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Gel-cast ceramic foams potentially offer a more robust configurable alternative filtration medium to monolithic wall flow filters (WFFs) for the reduction in particulate matter (PM) emissions from diesel internal combustion engines. The fundamental back pressure and filtration efficiency characteristics of gel-cast ceramic foam diesel particulate filters (DPFs) have been investigated. Methodology is developed for the first time that allows the calculation of the effect of local PM loading on the pressure drop characteristics from experimental data without problems caused by the non-uniform PM loading in the filter that can be applied to all depth bed filtration media. The back pressure and filtration efficiency relationships were used to develop graphical design spaces to aid development of application-specific DPFs. Effects of PM distribution on the pressure drop of the filter are presented. Filters with a non-even distribution of PM were found to have lower pressure drops than filters with an evenly distributed PM for the same average specific PM loadings. The predictions showed that gel-cast ceramic foams can achieve comparable back pressure, filtration volume, and PM holding capacity with WFFs with a lower filtration efficiency of about 80 per cent. The model demonstrated that greater than 90 per cent filtration efficiency can be achieved with filter volumes of about 0.6 times the volume of a WFF with a lower PM holding capacity.

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Section: Pm Distributionmentioning

confidence: 99%

“…With a high filtration efficiency and low back pressure these are currently the preferred practical DPF option. Despite these advantages they are readily damaged from uncontrolled thermal regeneration (filter-cleaning) events [13] (e.g. because of melting or cracking), and a robust alternative is desirable.…”

Section: Introductionmentioning

confidence: 99%

Analysis and optimization of gel-cast ceramic foam diesel particulate filter performance

Williams

Garner

Binner

2008

Proceedings of the Institution of Mechanical Engineers, Part D:

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show abstract

“…240 Επίσης σημαντική παράμετρος για την απόδοση μίας παγίδας είναι η θερμοκρασία λειτουργίας της, 241 και η αντοχή του κεραμικού μονόλιθου στη θερμοκρασία αναγένησης. 242 Η χρήση καταλυτών σε συνδυασμό με τις μονολιθικές παγίδες κατακράτησης της αιθάλης συμβάλλει στη μείωση των εκπομπών αερίων ρύπων μαζί με την κατακράτηση αιθάλης 243 " 245 καθώς και στη μείωση της θερμοκρασίας αναγέννησης. 232,246 Αναφέρεται επίσης ότι η σύσταση του διαλυτού οργανικού κλάσματος που παγιδεύεται στις παγίδες διαφέρει από αυτό που συλλέγεται με τις μεθόδους μέτρησης σωματιδίων, λόγω διαφορετικών θερμοκρασιών.…”

Section: παγίδες καπνούunclassified