On acoustic performance of the particle oxidation catalyst POC (R)

Antti Hynninen, Heikki Isomoisio, Mats Åbom, E Nousiainen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

Environmental legislation must be considered when designing internal combustion engine (IC-engine) exhaust systems. The reduction of the exhaust noise is mainly managed by proper silencer design, while less attention is paid to the acoustic performance of the after treatment devices (ATD). Usually the ATD unit is designed with the main emphasis on the emission control, i.e., chemical efficiency. It is known from the earlier studies, that the transmission loss of a typical car ATD unit can be quite significant. A car ATD unit is classically assembled from several specific parts such as selective catalytic reducers (SCR), diesel oxidation catalysts (DOC) and diesel particulate filters (DPF). One new alternative to the conventional DPF is the particle oxidation catalyst (POCr). The substrate used in the the POC-X type filter consists of fine, corrugated metallic mesh screens piled askew and rolled into a cylindrical shape. This paper presents a first investigation of the acoustic performance of the POC-X. In addition to the experimental studies, methods to define the acoustic two-port simulation model for POC-X are discussed. For comparison, also the acoustic behaviour of conventional open foil coated (OFC)-type catalysts are studied
Original languageEnglish
Title of host publicationProceedings of BNAM 2014
Place of PublicationTallinn
Pages540 - 546
Publication statusPublished - 2014
MoE publication typeB3 Non-refereed article in conference proceedings
EventBaltic-Nordic Acoustic Meeting, BNAM 2014 - Tallinn, Estonia
Duration: 2 Jun 20144 Jun 2014

Conference

ConferenceBaltic-Nordic Acoustic Meeting, BNAM 2014
Abbreviated titleBNAM 2014
CountryEstonia
CityTallinn
Period2/06/144/06/14

Fingerprint

fluid filters
catalysts
oxidation
acoustics
exhaust systems
silencers
internal combustion engines
transmission loss
mesh
foils
filters
simulation

Keywords

  • Acoustic
  • particle oxidation catalyst
  • POC

Cite this

Hynninen, A., Isomoisio, H., Åbom, M., & Nousiainen, E. (2014). On acoustic performance of the particle oxidation catalyst POC (R). In Proceedings of BNAM 2014 (pp. 540 - 546). Tallinn.
Hynninen, Antti ; Isomoisio, Heikki ; Åbom, Mats ; Nousiainen, E. / On acoustic performance of the particle oxidation catalyst POC (R). Proceedings of BNAM 2014. Tallinn, 2014. pp. 540 - 546
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Hynninen, A, Isomoisio, H, Åbom, M & Nousiainen, E 2014, On acoustic performance of the particle oxidation catalyst POC (R). in Proceedings of BNAM 2014. Tallinn, pp. 540 - 546, Baltic-Nordic Acoustic Meeting, BNAM 2014, Tallinn, Estonia, 2/06/14.

On acoustic performance of the particle oxidation catalyst POC (R). / Hynninen, Antti; Isomoisio, Heikki; Åbom, Mats; Nousiainen, E.

Proceedings of BNAM 2014. Tallinn, 2014. p. 540 - 546.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

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T1 - On acoustic performance of the particle oxidation catalyst POC (R)

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AU - Isomoisio, Heikki

AU - Åbom, Mats

AU - Nousiainen, E

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PY - 2014

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N2 - Environmental legislation must be considered when designing internal combustion engine (IC-engine) exhaust systems. The reduction of the exhaust noise is mainly managed by proper silencer design, while less attention is paid to the acoustic performance of the after treatment devices (ATD). Usually the ATD unit is designed with the main emphasis on the emission control, i.e., chemical efficiency. It is known from the earlier studies, that the transmission loss of a typical car ATD unit can be quite significant. A car ATD unit is classically assembled from several specific parts such as selective catalytic reducers (SCR), diesel oxidation catalysts (DOC) and diesel particulate filters (DPF). One new alternative to the conventional DPF is the particle oxidation catalyst (POCr). The substrate used in the the POC-X type filter consists of fine, corrugated metallic mesh screens piled askew and rolled into a cylindrical shape. This paper presents a first investigation of the acoustic performance of the POC-X. In addition to the experimental studies, methods to define the acoustic two-port simulation model for POC-X are discussed. For comparison, also the acoustic behaviour of conventional open foil coated (OFC)-type catalysts are studied

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Hynninen A, Isomoisio H, Åbom M, Nousiainen E. On acoustic performance of the particle oxidation catalyst POC (R). In Proceedings of BNAM 2014. Tallinn. 2014. p. 540 - 546