Patent number 8539758 is assigned to EMITEC Gesellschaft fuer Emissionstechnologie mbH (Lohmar, DE).
The following quote was obtained by the news editors from the background information supplied by the inventors: "Field of the Invention
"The invention relates to an exhaust-gas purification system for diesel engines, in particular of utility motor vehicles, including exhaust-gas purification components, such as, for example, an oxidation catalytic converter, a reducing agent injection device, a soot particle separator and a reduction catalytic converter, disposed in an exhaust section.
"In the field of the exhaust-gas treatment of mobile internal combustion engines, it has proven to be particularly expedient to use catalytic converters and soot particle separators constructed as honeycomb bodies, which have carrier elements (in particular metallic sheet-metal foils, wire nonwovens, etc., or else ceramic plates, extrudates, etc.) that form channels. It is possible for the structures of the carrier elements to be provided with microstructures which form openings and flow-guiding surfaces which are aligned so as to conduct partial flows of the exhaust gases along the carrier elements from the inside to the outside and/or vice versa.
"Different processes are used for the conversion of the harmful constituents of the exhaust gas of diesel engines. For example, in the so-called 'CRT' process, which is used for the reduction of soot, a conversion of soot is motivated even at low temperatures through the use of nitrogen dioxide generated in the exhaust gas. It is likewise possible for the so-called SCR process to be used, in which the nitrogen oxides contained in the exhaust gas are reduced through the use of a reducing agent (urea, ammonia, etc.). Combinations of those methods have also already been proposed. For that purpose, it is necessary for catalytic converters to be disposed in the exhaust system, wherein specifically in utility motor vehicles, due to the amount of exhaust gas produced, space problems can arise when integrating relatively large-volume converters.
"It emerges therefrom that the described exhaust-gas purification systems still have room for improvement in order to improve the thermal response behavior (for example after a cold start) and to obtain the highest possible exhaust-gas purification rate over a long period of time. Furthermore, it is sought to adapt the exhaust-gas purification system for diesel engines of utility motor vehicles to the given spatial conditions, taking into consideration the need to provide a large-volume exhaust muffler in order to meet the relevant legal regulations."
In addition to the background information obtained for this patent, NewsRx journalists also obtained the inventor's summary information for this patent: "It is accordingly an object of the invention to provide an exhaust-gas purification system for diesel engines, which overcomes the hereinafore-mentioned disadvantages and at least partially solves the highlighted problems of the heretofore-known systems of this general type and which specifies structural details of such a system for diesel engines, in particular for utility motor vehicles, with which it is possible to provide an efficient exhaust-gas purification configuration which has a simple and inexpensive construction and permits a space-saving configuration.
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