Regeneration apparatus
a technology of regeneration apparatus and fuel injection, which is applied in the direction of silting apparatus, engine components, machines/engines, etc., can solve the problems of only possible regeneration of particles by fuel injection and increase fuel consumption, and achieve the effects of more fuel-saving, flexible, and reliabl
Inactive Publication Date: 2010-01-21
FRIEDRICH BOYSEN
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Benefits of technology
The invention is a regeneration apparatus for particulate filters in exhaust gas systems of combustion engines. The apparatus includes a burner and a switching device that can activate and deactivate the burner and the injection apparatus selectively. The burner can heat the catalyst to a reaction temperature at which an exothermic reaction of the injected fuel takes place, and the switching device can activate and deactivate the burner and the injection apparatus in response to the operating state of the exhaust gas system and the combustion engine. The invention makes the regeneration of particulate filters more flexible, reliable, and fuel-saving.
Problems solved by technology
However, such a heating apparatus has to have a relatively high performance to heat the particulate filter to the ignition temperature of the soot, which has the consequence of an increased requirement for energy and installation space.
However, at catalyst temperatures below the light-off temperature, no exothermic reaction takes place so that a particulate filter regeneration by fuel injection is only possible at specific operating states of the combustion engine.
There is moreover the problem of an increased fuel consumption.
Method used
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Embodiment Construction
[0021]The exhaust gas duct 13 shown in the Figure receives the hot exhaust gas flow from a combustion engine (not shown) at an end disposed upstream and conducts it on up to an exhaust tailpipe (not shown) through which the exhaust gases are emitted into the atmosphere. Before escaping into the atmosphere, the exhaust gas flow, represented by an arrow, passes through a catalyst 15 and a particulate filter 11 for emission control. The catalyst 15 can be a common oxidation catalyst such as a diesel oxidation catalyst. The particulate filter 11 is a sooty particle filter which filters sooty particles contained in the exhaust gas flow from the exhaust gas flow and stores it in its interior. A regeneration apparatus is arranged upstream of the catalyst 15 and is made here as a modular device or as a regeneration module 23. The regeneration module 23 includes both an injection apparatus 17 and a burner 19 which are both in communication with the exhaust gas duct 13. The injection apparatu...
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A regeneration apparatus for a particulate filter of an exhaust gas system is provided which includes an exhaust gas duct and a catalyst which is integrated into the exhaust gas duct upstream of the particle filter. The exhaust gas system or the combustion engine includes an injection apparatus which is in communication with a fuel reservoir and is able to input fuel, in particular fuel containing hydrocarbons, into the exhaust gas flow. The regeneration apparatus includes a burner and at least one switching device. The burner is able to heat the catalyst to a reaction temperature at which an exothermic reaction of the fuel takes place. The switching device is able to activate and deactivate the burner and / or the injection apparatus selectively in dependence on an operating state of the exhaust gas system. An exhaust gas system for a combustion engine and a method for the regeneration of a particulate filter of an exhaust gas system are also provided.
Description
FIELD OF THE INVENTION[0001]The present invention relates to a regeneration apparatus for a particulate filter of an exhaust gas system which includes an exhaust gas duct for the conducting of a hot exhaust gas flow away from a combustion engine, in particular from a diesel engine, and a catalyst, in particular an oxidation catalyst, which is integrated into the exhaust gas duct upstream of the particulate filter, wherein the exhaust gas system or the combustion engine includes an injection apparatus which is in communication with a fuel reservoir and is able to input fuel, in particular fuel containing hydrocarbons, into the exhaust gas flow.BACKGROUND OF THE INVENTION[0002]Combustion engines emit an exhaust gas flow containing different kinds of pollutants into the atmosphere. Various apparatus for exhaust gas post-treatment have been developed to reduce the emission of pollutants. For example, catalysts are used for the conversion of harmful gaseous substances into harmless compo...
Claims
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IPC IPC(8): F01N3/20F01N3/025
CPCF01N3/025F01N3/035F01N3/0253
Inventor MUSCHIK, CHRISTIANWINTER, HAYRI
Owner FRIEDRICH BOYSEN