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Patent
Daimler AG, HJS Emission Technology GmbH Co. KG and Johnson Matthey | Date: 2014-09-17

A system for NO_(x )reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of NO to NO_(2), particulate filter, a source of reductant such as NH_(3 )and an SCR catalyst and methods for operating such a system are disclosed. Considerable improvements in NO_(x )conversion and soot reduction are observed even at relatively low operating temperatures.


Patent
Johnson Matthey, Diamler AG and HJS Emission Technology GmbH Co. KG | Date: 2013-03-15

A system for NO_(x )reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of NO to NO_(2), particulate filter, a source of reductant such as NH_(3 )and an SCR catalyst. Considerable improvements in NO_(x )conversion are observed.


Patent
Johnson Matthey, Diamler AG and HJS Emission Technology GmbH Co. KG | Date: 2013-03-15

A system for NO_(x), reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of NO to NO_(2), particulate filter, a source of reductant such as NH_(3 )and an SCR catalyst. Considerable improvements in NO_(x )conversion are observed.


Patent
Daimler AG, HJS Emission Technology GmbH Co. KG and Johnson Matthey | Date: 2014-04-11

A system for NO_(x )reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of NO to NO_(2), particulate filter, a source of reductant such as NH_(3 )and an SCR catalyst. Considerable improvements in NO_(x )conversion are observed.


Patent
Daimler AG, HJS Emission Technology GmbH Co. KG and Johnson Matthey | Date: 2014-09-17

A system for NO_(x )reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of NO to NO_(2), particulate filter, a source of reductant such as NH_(3 )and an SCR catalyst and methods for operating such a system are disclosed. Considerable improvements in NO_(x )conversion and soot reduction are observed even at relatively low operating temperatures.


Patent
HJS Emission Technology GmbH Co. KG | Date: 2011-10-12

A method for lowering the ignition temperature of soot accumulated on a particulate filter 2 installed in exhaust tract 1 of an internal combustion engine is described. In this method, a precursor of a catalyst which lowers the oxidation temperature of soot is introduced into exhaust tract 1 downstream from the internal combustion engine and upstream from particulate filter 2. The precursor introduced into exhaust tract 1 is converted to its gaseous phase within exhaust tract 1 prior to contacting the soot accumulated on particulate filter 2. The gaseous catalyst precursor is adsorbed by the soot accumulated on particulate filter 2. Subsequently the catalyst responsible for lowering the ignition temperature is formed from the gaseous precursor in a reaction with at least one other component contained in the exhaust gas flow.


The invention relates to a method for feeding thermal energy into an exhaust emission control unit (2) connected in The exhaust gas system of an internal combustion engine by heating the exhaust has flowing to the exhaust emission control unit (2). Said exhaust has is heated to a SET temperature by converting hydrocarbons (HCs) metered into the exhaust has flow at two oxidation catalytic Converters (7, 10) series-connected in the flow direction of the exhaust gas.


Patent
HJS Emission Technology GmbH Co. KG | Date: 2012-03-26

A heating module (1) for an exhaust-gas purification system connected to the outlet of an internal combustion engine comprises a catalytic burner, with an HC injector (14) and with an oxidation catalytic converter (12) positioned downstream of the HC injector (14) in the flow direction of the exhaust gas, for supplying thermal energy to an exhaust-gas purification unit of the exhaust-gas purification system. It is provided here that the heating module (1) has a main section (2), a secondary section (3) which comprises the catalytic burner (12, 14), and a device (4, 5) for controlling the exhaust-gas mass flow flowing through the secondary section (3). In a first embodiment, the main section (2) has, in the inlet region of the heating module (1), an overflow pipe portion (6) which has overflow openings (7), between which overflow diverting chambers (8) is simulated, parallel to the main section (2) of the heating module (1), the secondary section portion (11) with the oxidation catalytic converter (12). In another embodiment, it is provided that the secondary section (3) has, at the inlet side and outlet side, in each case one diverting chamber (8) which extends in the radial direction from the main section (2), between which diverting chamber (8) is simulated, parallel to the main section (2) of the heating module (1), the secondary section portion (11) with the oxidation catalytic converter (12).


Patent
HJS Emission Technology GmbH Co. KG | Date: 2013-03-11

The invention relates to a particulate filter (1) designed as a partial filter, particularly as a soot particulate filter for removing soot particles from the exhaust gas flow of an internal combustion engine, said filter comprising a filter block unit (3) that is held in a filter housing (2), is designed as a channel filter and comprises a plurality of parallel channels (6, 6.1) which are separated from one another by filter walls (7). The filter block unit (3) comprises at least two filter blocks (5, 5.1) connected one behind the other in the direction of the exhaust gas flow. Each filter block (5, 5.1) is designed as a partial filter, with a first plurality of the channels of each filter block (5, 5.1) being open on the outflow side, and a further plurality thereof being closed on said outflow side.


Hjs

Trademark
HJS Emission Technology GmbH Co. KG | Date: 2013-04-23

Exhaust gas treatment systems for internal combustion engines; exhaust gas treatment system machine parts for internal combustion engines, namely, fasteners for fastening components and parts of exhaust gas treatment systems to each other; exhaust gas treatment system machine parts for internal combustion engines, namely, holders for holding components and parts of exhaust gas cleaning systems in place; exhaust gas treatment system machine parts for internal combustion engines, namely, bearing brackets for receiving components and parts of exhaust gas cleaning systems for holding them in place; internal combustion engine parts, namely, engine sensors for sensing exhaust gas temperatures; internal combustion engine parts, namely, engine sensors for sensing exhaust gas oxidant levels; internal combustion engine parts, namely, engine sensors for sensing exhaust gas nitrogen oxide levels; internal combustion engine parts, namely, exhaust gas particulate traps; internal combustion engine parts, namely, exhaust gas oxidation and reduction catalysts; internal combustion engine parts, namely, exhaust gas reduction catalysts; internal combustion engine parts, namely, exhaust gas SCR-catalysts; internal combustion engine parts, namely, exhaust gas nitrogen oxide traps designed to remove nitrogen oxides from exhaust gas; internal combustion engine parts, namely, filters for removing particulates from exhaust gas; carburetors for the control of the composition of fuel and air mixtures except for land craft. Electronic controls for the operation of carburetors which control the composition of fuel and air mixtures for combustion engines; Electronic controls for the operation of systems which the control the composition of fuel and air mixtures for combustion engines. Carburetors; Dosing apparatus for vehicles for admixing a reducing agent with exhaust gases thereby reducing pollution. Engineering of exhaust gas cleaning equipment and their parts and engineering of exhaust gas cleaning systems.

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