Patents by Inventor Ulf Klein
Ulf Klein has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220065188Abstract: An internal combustion engine of a motor vehicle includes an element at the cylinder inner wall for scraping off oil carbon. The internal combustion engine includes at least one working cylinder and a cylinder head closing the working cylinder, the working cylinder including a cylinder barrel and/or a cylinder liner (1), and which includes at least one element in the area of the cylinder head, which is suitable for scraping off any accumulated oil carbon.Type: ApplicationFiled: August 19, 2021Publication date: March 3, 2022Inventors: Martin BLANKENHORN, Thomas BREHMER, Stephan HEEGER, Thomas HOEN, Peter HOFFMANN, Ulf KLEIN, Thomas WERNER
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Patent number: 10060319Abstract: An internal combustion engine, including at least one exhaust-gas line having at least one device for the after-treatment of the exhaust gas and at least one urea-water solution tank, whereby the urea-water solution tank 3 is located close to the engine, is provided.Type: GrantFiled: February 6, 2017Date of Patent: August 28, 2018Assignee: DEUTZ AktiengesellschaftInventors: Meike Wittrock, Ulf Klein, Gerald Leyh
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Publication number: 20170218820Abstract: An internal combustion engine, including at least one exhaust-gas line having at least one device for the after-treatment of the exhaust gas and at least one urea-water solution tank, whereby the urea-water solution tank 3 is located close to the engine, is provided.Type: ApplicationFiled: February 6, 2017Publication date: August 3, 2017Inventors: Meike Wittrock, Ulf Klein, Gerald Leyh
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Patent number: 9656210Abstract: An internal combustion engine, including at least one exhaust-gas line having at least one device for the after-treatment of the exhaust gas and at least one urea-water solution tank, whereby the urea-water solution tank 3 is located close to the engine, is provided.Type: GrantFiled: February 13, 2015Date of Patent: May 23, 2017Assignee: Deutz AktiengesellschaftInventors: Meike Wittrock, Ulf Klein, Gerald Leyh
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Patent number: 9561470Abstract: A method in which the exhaust gas that is to be purified is passed through an exhaust-gas line containing a diesel oxidation catalyst (DOC) for the oxidation of residual gaseous hydrocarbons (HC) and carbon monoxide (CO) in order to form carbon dioxide (CO2) and for the at least proportional oxidation of the nitrogen monoxide (NO) contained in the exhaust gas in order to form nitrogen dioxide (NO2) is provided.Type: GrantFiled: February 13, 2015Date of Patent: February 7, 2017Assignee: Deutz AktiengesellschaftInventors: Meike Wittrock, Ulf Klein, Gerald Leyh
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Publication number: 20150231565Abstract: A method in which the exhaust gas that is to be purified is passed through an exhaust-gas line containing a diesel oxidation catalyst (DOC) for the oxidation of residual gaseous hydrocarbons (HC) and carbon monoxide (CO) in order to form carbon dioxide (CO2) and for the at least proportional oxidation of the nitrogen monoxide (NO) contained in the exhaust gas in order to form nitrogen dioxide (NO2) is provided.Type: ApplicationFiled: February 13, 2015Publication date: August 20, 2015Inventors: Meike Wittrock, Ulf Klein, Gerald Leyh
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Publication number: 20150231564Abstract: An internal combustion engine, including at least one exhaust-gas line having at least one device for the after-treatment of the exhaust gas and at least one urea-water solution tank, whereby the urea-water solution tank 3 is located close to the engine, is provided.Type: ApplicationFiled: February 13, 2015Publication date: August 20, 2015Inventors: Meike Wittrock, Ulf Klein, Gerald Leyh
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Patent number: 8155509Abstract: A device and method for providing a gaseous substance mixture which includes at least one reducing agent and/or at least one reducing agent precursor, includes a reservoir for an aqueous solution which includes at least one reducing agent precursor that can be flow connected to an evaporator chamber, and a device for dosing the aqueous solution in the evaporator chamber. A device can heat the evaporator chamber to a temperature higher than or equal to a critical temperature, in which the aqueous solution is at least partially evaporated. The device and method enable reducing agent to be provided for selective catalytic reduction of nitrogen oxides in the exhaust of an internal combustion engine. Preferably, an evaporator unit is configured as the evaporator chamber and a hydrolysis catalytic converter is disposed outside the exhaust system. As a result, the size of the hydrolysis catalytic converter is reduced, allowing compact construction.Type: GrantFiled: November 17, 2008Date of Patent: April 10, 2012Assignee: Emitec Gesellschaft fuer Emissionstechnologie mbHInventors: Rolf Brück, Marc Brugger, Thomas Härig, Peter Hirth, Ulf Klein
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Patent number: 7986870Abstract: A device and a method for providing a gaseous substance mixture including at least one of a reducing agent and/or a reducing agent precursor, include a reservoir for an aqueous solution including at least one reducing agent precursor, from which the aqueous solution can be delivered into at least one metering line having a dispensing opening by a delivery device, and a device for heating the metering line above a critical temperature greater than the boiling temperature of water. Complete evaporation of an aqueous solution including urea and subsequent hydrolysis to form a substance mixture including ammonia, are carried out. The substance mixture is metered as a reducing agent into an SCR catalytic converter. Carrying out the evaporation outside the exhaust system uses considerably smaller hydrolysis catalytic converters, which is space-saving and cost-saving compared to conventional devices for providing a reducing agent for selective catalytic reduction of nitrogen oxides.Type: GrantFiled: November 17, 2008Date of Patent: July 26, 2011Assignee: Emitec Gesellschaft fuer Emissionstechnologie mbHInventors: Rolf Brück, Marc Brugger, Thomas Härig, Peter Hirth, Ulf Klein
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Publication number: 20090127511Abstract: A device and method for providing a gaseous substance mixture which includes at least one reducing agent and/or at least one reducing agent precursor, includes a reservoir for an aqueous solution which includes at least one reducing agent precursor that can be flow connected to an evaporator chamber, and a device for dosing the aqueous solution in the evaporator chamber. A device can heat the evaporator chamber to a temperature higher than or equal to a critical temperature, in which the aqueous solution is at least partially evaporated. The device and method enable reducing agent to be provided for selective catalytic reduction of nitrogen oxides in the exhaust of an internal combustion engine. Preferably, an evaporator unit is configured as the evaporator chamber and a hydrolysis catalytic converter is disposed outside the exhaust system. As a result, the size of the hydrolysis catalytic converter is reduced, allowing compact construction.Type: ApplicationFiled: November 17, 2008Publication date: May 21, 2009Applicant: EMITEC GESELLSCHAFT FUR EMISSIONSTECHNOLOGIE MBHInventors: Rolf Bruck, Marc Brugger, Thomas Harig, Peter Hirth, Ulf Klein
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Patent number: 7533522Abstract: A method and apparatus for adding a reactant to an exhaust gas from an internal combustion engine is based on the principle of dividing the exhaust gas stream into an inner exhaust gas flow and an outer exhaust gas flow, which radially surrounds the inner exhaust gas flow. A swirl is imparted to the outer exhaust gas flow and then the reactant is added to the inner exhaust gas flow. The method and apparatus advantageously enable the reactant, in particular a reducing agent precursor and/or a reducing agent, preferably urea, in particular in aqueous solution, to be introduced into the exhaust system of the internal combustion engine without the formation of undesirable by-products, such as for example biuret, as a result of contact between the reactant and the usually relatively cool outer tubular casing of the apparatus.Type: GrantFiled: August 15, 2006Date of Patent: May 19, 2009Assignee: Emitec Gesellschaft fuer Emissionstechnologie mbHInventor: Ulf Klein
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Publication number: 20090120078Abstract: An apparatus for treating exhaust gas of an internal combustion engine, includes a feed conduit feeding aqueous solution, a hydrolysis catalytic converter connected to the feed conduit and an SCR catalytic converter through which exhaust gas flows. A rod-shaped heating element heats at least parts of the feed conduit and/or hydrolysis catalytic converter. The apparatus provides a compact structure of a feed conduit heated by a rod-shaped element and a corresponding hydrolysis catalytic converter, with which an aqueous solution containing urea can be evaporated and then hydrolyzed to a gas stream containing ammonia. This gas stream serves as a reducing agent in the SCR process. The compact configuration allows installation in very confined space conditions. The hydrolysis catalytic converter, through which exhaust gas does not flow, permits the volume of the hydrolysis catalytic converter to be decisively reduced, since significantly smaller mass flows of gas need to be hydrolyzed therein.Type: ApplicationFiled: November 17, 2008Publication date: May 14, 2009Applicant: EMITEC GESELLSCHAFT FUR EMISSIONSTECHNOLOGIE MBHInventors: Rolf Bruck, Marc Brugger, Thomas Harig, Peter Hirth, Ulf Klein
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Publication number: 20090107120Abstract: A device for treating exhaust gas of an internal combustion engine includes a reducing agent solution evaporator, a hydrolysis catalytic converter connected thereto for hydrolysis of urea to form ammonia and an SCR catalytic converter for selective catalytic reduction of nitrogen oxides. The evaporator includes an evaporator unit providing a gaseous substance mixture including at least one reducing agent precursor and/or reducing agent. The evaporator unit evaporates an aqueous solution including at least one reducing agent precursor. The SCR catalytic converter is in an exhaust line, and the evaporator and the hydrolysis catalytic converter are outside of and can be connected to the exhaust line. A sufficiently large quantity of reducing agent for selective catalytic reduction of nitrogen oxides in the SCR catalytic converter can be provided, while permitting a smaller volume of the hydrolysis catalytic converter than in the prior art, since it is not traversed by exhaust gas.Type: ApplicationFiled: November 17, 2008Publication date: April 30, 2009Applicant: EMITEC GESELLSCHAFT FOR EMISSIONSTECHNOLOGIE MBHInventors: Rolf Bruck, Marc Brugger, Thomas Harig, Peter Hirth, Ulf Klein
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Publication number: 20090107125Abstract: A device and a method for providing a gaseous substance mixture including at least one of a reducing agent and/or a reducing agent precursor, include a reservoir for an aqueous solution including at least one reducing agent precursor, from which the aqueous solution can be delivered into at least one metering line having a dispensing opening by a delivery device, and a device for heating the metering line above a critical temperature greater than the boiling temperature of water. Complete evaporation of an aqueous solution including urea and subsequent hydrolysis to form a substance mixture including ammonia, are carried out. The substance mixture is metered as a reducing agent into an SCR catalytic converter. Carrying out the evaporation outside the exhaust system uses considerably smaller hydrolysis catalytic converters, which is space-saving and cost-saving compared to conventional devices for providing a reducing agent for selective catalytic reduction of nitrogen oxides.Type: ApplicationFiled: November 17, 2008Publication date: April 30, 2009Applicant: EMITEC GESELLSCHAFT FUR EMISSIONSTECHNOLOGIE MBHInventors: Rolf Bruck, Marc Brugger, Thomas Harig, Peter Hirth, Ulf Klein
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Publication number: 20080250779Abstract: A device for exhaust gas treatment includes an exhaust gas line through which an exhaust gas can flow in a flow direction, a supply for feeding a reducing agent into the exhaust gas line, a regulating unit for dosing the reducing agent to be supplied, and a carrier body for bringing about a chemical reaction of the reducing agent with at least one constituent of the exhaust gas. The carrier body is positioned downstream of the supply in the flow direction, and the carrier body has at least one metallic base body at least partially including a coating with a storage capability for the reducing agent. Two methods for the dosed provision of a reducing agent, especially a solid reducing agent, are also provided. The methods and device allow economical use of the reducing agent while guaranteeing an approximately 100% reaction of the nitrogen oxides contained in the exhaust gas.Type: ApplicationFiled: October 15, 2007Publication date: October 16, 2008Applicant: EMITEC GESELLSCHAFT FUR EMISSIONSTECHNOLOGIE MBHInventors: Rolf Bruck, Peter Hirth, Ulf Klein, Wolfgang Held
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Publication number: 20080102010Abstract: A device for treating exhaust gases includes a particle separator, an SCR catalytic converter for selectively reducing nitrogen oxides and an ammonia generator for generating ammonia as a selective reducing agent for reducing nitrogen oxides. The particle separator is provided in a main exhaust line and the ammonia generator is provided in a first secondary line. The first secondary line opens into the main exhaust line at a junction in such a way that an ammonia-containing gas stream generated in the ammonia generator can flow through the SCR catalytic converter. The method and the device advantageously permit the proportion of particles and nitrogen oxides (NOx) contained in the exhaust gas of an internal combustion engine to be reduced simultaneously, with the energy consumption for this reduction being small and at the same time the entire device being embodied as a compact unit.Type: ApplicationFiled: December 3, 2007Publication date: May 1, 2008Applicant: EMITEC GESELLSCHAFT FUR EMISSIONSTECHNOLOGIE MBHInventors: Rolf Bruck, Peter Hirth, Wolfgang Held, Eberhard Jacob, Ulf Klein
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Publication number: 20070051097Abstract: A method and apparatus for adding a reactant to an exhaust gas from an internal combustion engine is based on the principle of dividing the exhaust gas stream into an inner exhaust gas flow and an outer exhaust gas flow, which radially surrounds the inner exhaust gas flow. A swirl is imparted to the outer exhaust gas flow and then the reactant is added to the inner exhaust gas flow. The method and apparatus advantageously enable the reactant, in particular a reducing agent precursor and/or a reducing agent, preferably urea, in particular in aqueous solution, to be introduced into the exhaust system of the internal combustion engine without the formation of undesirable by-products, such as for example biuret, as a result of contact between the reactant and the usually relatively cool outer tubular casing of the apparatus.Type: ApplicationFiled: August 15, 2006Publication date: March 8, 2007Inventor: Ulf Klein