PM cat

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PM-Kat system

PM-KAT is the brand name for a particle separation system ( metal catalytic converter ) developed by MAN AG , which is located in the stainless steel silencer . It works maintenance-free and blockage-free and does not require any additional operating material. This is a bypass deep bed filter , incorrectly also called a flow filter or an open system , an open filter . The filter consists of corrugated layers with scoop-shaped sub-structures and layers of sintered metal fleece arranged in between, which serve as a storage medium for the particles. Due to the shovel-shaped structures, part of the exhaust gas flow is diverted through the fleece into the adjacent channels. The soot particles are deposited in the fleece layer and thus filtered. A large part of the exhaust gas flow is guided past the fleece layer in the longitudinal direction by this deflection and thereby separates mainly ultra-fine particles (diameter <400 nanometers) to about 80% due to diffusions / adhesions . The reduction in the total particle mass is 30 to 40%, sometimes even more. The NO 2 occurring in the upstream oxidation catalytic converter supports the continuous soot burn-off by means of a chemical reaction. This filter is used by the truck / engine manufacturer MAN to achieve the particle values ​​for the exhaust gas limit values ​​up to Euro V for various truck engines. For the next stage of the exhaust gas limit values ​​according to the EEV standard, a particle filter will no longer be sufficient; instead, an additional system is then required to reduce the NO x exhaust gases. Combined particle filter / SCR systems are expected to be used. These were presented by various vehicle manufacturers at the 2008 IAA Commercial Vehicles.

PM-Kat from MAN with diesel particle filter from Emitec of the PM-Metalit type

These filters are manufactured by Roth-Technik Austria  (RTA) in Lower Austria.

literature

  • Richard van Basshuysen, Fred Schäfer: Handbook Internal Combustion Engine Basics, Components, Systems, Perspectives. 3rd edition, Friedrich Vieweg & Sohn Verlag / GWV Fachverlage GmbH, Wiesbaden, 2005, ISBN 3-528-23933-6

Individual evidence

  1. ↑ Andreas Döring: Process and device for the separation of fine particles from the exhaust gas of internal combustion engines . Ed .: German Patent Office. DE19934932 ( dpma.de [PDF]).
  2. ↑ Eberhard Jacob .; Nunzio D'Alfonso; Andreas Döring; Stephan Reisch; Dieter Rothe; Rolf Brück; Driver: PM-Kat: Non-blocking solution to reduce diesel soot for Euro 4 commercial vehicle engines . In: HP Lenz (Ed.): 23rd International Vienna Motor Symposium . tape 12 , no. 490 . Progress reports VDI series, 2002, p. 196-216 .
  3. ↑ Diesel particle filter: high-tech on hold.  ( Page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. @1@ 2Template: Toter Link / newsletter.hanser.de   In: BLECH InForm 1/2006, Carl Hanser Verlag, Munich, pp. 20–24 (article pdf, newsletter.hanser.de, accessed April 22, 2015).