Advertisement

Topics in Catalysis

, Volume 56, Issue 1–8, pp 483–488 | Cite as

In-Operation Monitoring of the Soot Load of Diesel Particulate Filters: Initial Tests

  • Markus Feulner
  • Gunter Hagen
  • Andreas Piontkowski
  • Andreas Müller
  • Gerhard Fischerauer
  • Dieter Brüggemann
  • Ralf MoosEmail author
Original Paper

Abstract

Diesel particulate filters (DPF) are indispensable parts of modern automotive exhaust gas aftertreatment systems due to the stringent emissions legislation. For a fuel-efficient control strategy, it would be beneficial to determine directly and in-operation their actual trapped soot mass. Two novel approaches—based on the electrical conductivity of trapped soot particles—emerged recently. By measuring the electrical resistance between different single walls inside the filter, the soot load is determined with local resolution. The microwave-based technique is a contactless approach that gives an integral value depending on the soot mass in the DPF. We present investigations on loading and regeneration of DPFs in a dynamometer test bench applying both methods. The results are compared with each other and correlated with the differential pressure and the soot mass. Especially the microwave-based technique has a potential for serial application.

Keywords

Cavity perturbation Microwave Radio frequency (RF) Soot conductivity Diesel particulate filter (DPF) Soot and ash load 

Notes

Acknowledgments

The authors R.M. and G.F. are indebted to the German Research Foundation (DFG) for financial support under grant number MO 1060/6-2 and FI 956/3-2, respectively.

References

  1. 1.
    Twigg MV (2007) Progress and future challenges in controlling automotive exhaust gas emissions. Appl Catal B 70:2–15CrossRefGoogle Scholar
  2. 2.
    Rose D, Boger T (2009) Different approaches to soot estimation as key requirement for DPF applications. SAE paper 2009-01-1262. doi: 10.4271/2009-01-1262
  3. 3.
    Birkhofer T, Dittler A, Hertzberg A, Knezevic A, Plog C (2008) Device for determination of the state of a soot particle filter. European patent specification, EP 1714012 B1Google Scholar
  4. 4.
    Birkhofer T, Knezevic A, Mueller R, Plog C (2005) Method of operating a diesel particle filter. European patent application, EP 1564387 A1Google Scholar
  5. 5.
    Hagen G, Feistkorn C, Wiegärtner S, Heinrich A, Brüggemann D, Moos R (2010) Conductometric soot sensor for automotive exhausts: initial studies. Sensors 10:1589–1598CrossRefGoogle Scholar
  6. 6.
    Ochs T, Schittenhelm A, Genssle A, Kamp B (2010) Particulate matter sensor for on board diagnostics (OBD) of diesel particulate filters (DPF). SAE paper 2010-01-0307. doi: 10.4271/2010-01-0307
  7. 7.
    Grob B, Schmid J, Ivleva NP, Niessner R (2012) Conductivity for soot sensing: possibilities and limitations. Anal Chem 84:3586–3592CrossRefGoogle Scholar
  8. 8.
    Reiß S, Spörl M, Hagen G, Fischerauer G, Moos R (2011) Combination of wirebound and microwave measurements for in situ characterization of automotive three-way catalysts. IEEE Sens J 11:434–438CrossRefGoogle Scholar
  9. 9.
    Fischerauer G, Spörl M, Gollwitzer A, Wedemann M, Moos R (2008) Catalyst state observation via the perturbation of a microwave cavity resonator. Frequenz 62:180–184CrossRefGoogle Scholar
  10. 10.
    Fischerauer G, Spörl M, Reiß S, Moos R (2010) Microwave-based investigation of electrochemical processes in catalysts and related systems. Tech Mess 77:419–427CrossRefGoogle Scholar
  11. 11.
    Fischerauer G, Förster M, Moos R (2010) Sensing the soot load in automotive diesel particulate filters by microwave methods. Meas Sci Technol 21:035108CrossRefGoogle Scholar
  12. 12.
    Sappok A, Bromberg L, Parks J, Prikhodko V (2010) Loading and regeneration analysis of a diesel particulate filter with a radio frequency-based sensor. SAE paper 2010-01-2126. doi: 10.4271/2010-01-2126
  13. 13.
    Hansson J, Ingeström V (2012) A method for estimating soot load in a DPF using an RF-based sensor. Master Thesis, Linköping University, SwedenGoogle Scholar
  14. 14.
    Dunne L, Sarkar A, Kroto H, Munn J, Kathirgamanathan P, Heinen U, Fernandez J, Hare J, Reid D, Clark A (1996) Electrical, magnetic and structural characterization of fullerene soots. J Phys Condens Matter 8:2127–2141CrossRefGoogle Scholar
  15. 15.
    Schejbal M, Marek M, Kubicek M, Koci P (2009) Modelling of diesel filters for particulates removal. Chem Eng J 154:219–230CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Markus Feulner
    • 1
  • Gunter Hagen
    • 1
  • Andreas Piontkowski
    • 1
  • Andreas Müller
    • 1
  • Gerhard Fischerauer
    • 1
  • Dieter Brüggemann
    • 1
  • Ralf Moos
    • 1
    Email author
  1. 1.Bayreuth Engine Research Center (BERC)BayreuthGermany

Personalised recommendations