| Patent application number | Description | Published |
|---|
| 20090145117 | Exhaust gas aftertreatment system - Exhaust gas aftertreatment system for internal combustion engines operated with a lean mixture, wherein nitrogen oxides are reduced by an SCR catalyst, and particulates are removed by a particle separator or filter. A thermolysis catalyst is located near the engine in the exhaust gas split stream downstream of the supply point of the reducing agent. At temperatures above 135° C., this thermolysis catalyst vaporizes the water component of the aqueous urea solution. It contains a catalyst material that is thermally stable at exhaust gas temperatures occurring near the engine and preferentially reacts with the urea to form isocyanic acid. A hydrolysis catalyst is located in the exhaust gas stream downstream of the return of the split stream into the main stream of exhaust gas. The hydrolysis catalyst converts the isocyanic acid formed during thermolysis to ammonia and carbon dioxide using water vapor formed in the thermolysis catalyst. | 06-11-2009 |
| 20090151339 | Method and Arrangement for Improving the Hydrolysis of a Reduction Agent in an Exhaust Gas Post Treatment System - A method and arrangement for improving hydrolysis of a reduction agent in an exhaust gas post treatment system for selective catalytic reduction of NO | 06-18-2009 |
| 20090313978 | Particle Separator and Method for Removing Particles from an Exhaust Gas Stream of an Internal Combustion Engine - A particle separator and method for removing particles from an exhaust gas stream of an internal combustion engine. A prescribed number of flow cells are formed in the particle separator. The exhaust gas stream flows into and/or out of the flow cells via, as viewed in a main direction of flow of the exhaust gas stream, side wall regions of the flow cells. At least one storage space is formed in the flow cells for storing particles removed from the exhaust gas stream, which flows through at least portions of the particle separator. | 12-24-2009 |
| 20090317314 | Particle Separator and Method for Removing Particles from an Exhaust Gas Stream of an Internal Combustion Engine - A particle separator and method for removing particles from an exhaust gas stream of an internal combustion engine. Differing flow regions having different flow conditions are formed in the particle separator. The differing flow regions are configured such that essentially particles having different, defined sizes and/or masses are adapted to be separated out of the exhaust gas stream in the differing flow regions. The exhaust gas stream is adapted to flow through at least portions of the particle separator. | 12-24-2009 |
| 20100037600 | Particle Separator, Especially a Particle Filter, for the Separation of Particles from the Exhaust Gas Stream of an Internal Combustion Engine - A particle separator for the separation of particles from the exhaust gas stream of an internal combustion engine. The particle separator includes different heat transfer zones arranged at least in the main flow direction of an exhaust gas stream through the particle separator, different, that is, with respect to heat storage capacity and/or thermal conductivity and/or the heat-transfer properties from the exhaust gas stream to the particle separator. Each of these different zones makes it possible for a precisely defined amount of heat to be transferred from the exhaust gas stream to the individually assigned sections of the particle separator. | 02-18-2010 |
| 20100037607 | METHOD AND DEVICE FOR THE REGENERATION OF A PARTICLE FILTER ARRANGED IN THE EXHAUST GAS TRACT OF AN INTERNAL COMBUSTION ENGINE - A method and to a device for the regeneration of a particle filter arranged in the exhaust gas tract of an internal combustion engine with at least one NO oxidation catalyst for the oxidation of NO, especially to NO | 02-18-2010 |
| 20100037768 | METHOD AND DEVICE FOR THE REGENERATION OF A PARTICLE FILTER ARRANGED IN THE EXHAUST GAS TRACT OF AN INTERNAL COMBUSTION ENGINE - A method and to a device for the regeneration of a particle arranged in the exhaust gas train of an internal combustion engine. An exhaust gas stream to be cleaned is supplied to the at least one particle filter. At least in a regeneration mode, a predetermined amount of an exhaust gas stream to be heated is branched off from the exhaust gas stream upstream of an exhaust gas turbine of an exhaust gas turbocharger which branched-off stream, after it has been heated by a heater is mixed in the form of a heated exhaust gas stream at a point upstream of the at least one particle filter back into the residual gas stream which is coming from the exhaust gas turbine and which is at a lower temperature than that of the other stream. | 02-18-2010 |
| 20100041543 | Method and Device for the Regeneration of a Particle Filter Arranged in the Exhaust Gas Train of an Internal Combustion Engine - A method and a device for the regeneration of a particle filter, especially a diesel particle filter, arranged in the exhaust gas train of an internal combustion engine, wherein an exhaust gas stream to be cleaned is supplied to the at least one particle filter. The exhaust gas stream supplied to the at least one particle filter is a raw exhaust gas stream of the internal combustion engine, into which, during regeneration mode, a heated exhaust gas stream at a higher temperature than the raw exhaust gas stream is mixed at a point upstream of the particle filter under the control of at least one open-loop and/or closed-loop control device, which actuates a throttle device and/or shut-off device in accordance with predetermined regeneration parameters. | 02-18-2010 |
| 20100223907 | Method For Adjusting the Metered Quantity of Reducing Agent For Selective Catalytic Reduction - A method for application in conjunction with an exhaust gas post-treatment system for metering an ammonia-releasing reducing agent into the exhaust gas stream of an internal combustion engine installed in a motor vehicle and operated with excess air. A control unit meters the quantity of reducing agent as a function of a stored model and during the operation of the internal combustion engine varies the metered quantity during certain operating phases and compares the change in the measured value of at least one NO | 09-09-2010 |
| 20100223914 | Method For Adjusting the Metered Additions of Reducing Agent For Selective Catalytic Reduction - A method for use in conjunction with an exhaust gas post-treatment system for metering an ammonia-releasing reducing agent into the exhaust gas stream of an internal combustion engine installed in a motor vehicle and operating with excess air. A control unit meters the quantity of reducing agent as a function of a stored model and, during the operation of the internal combustion engine, determines, by comparison of a value proportional to the nominal emission or the nominal conversion stored in the control unit of the internal combustion engine for the associated operating point of the internal combustion engine and/or of the exhaust gas post-treatment system with a value proportional to the actual emission or the actual conversion metrologically determined by the control unit. | 09-09-2010 |
| 20110085954 | Arrangement for Reducing Nitrogen Oxides in Exhaust Gases - An arrangement and method for reducing the nitrogen oxide content in the exhaust gas of an internal combustion engine with the aid of ammonia and/or ammonia-releasing reduction agents, whereby ammonia and/or ammonia-containing reduction agent is added to the exhaust gas stream upstream of a catalyst combination composed of an SCR catalyst and a subsequent NH | 04-14-2011 |
