Patents by Inventor Carl-Johan Karlsson
Carl-Johan Karlsson 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: 20240132455Abstract: The present disclosure relates to certain (2S)—N-[(1S)-1-cyano-2-phenylethyl]-1,4-oxazepane-2-carboxamide compounds (including pharmaceutically acceptable salts thereof), that inhibit dipeptidyl peptidase 1 (DPP1) activity, to their utility in treating and/or preventing clinical conditions including respiratory diseases, such as asthma and chronic obstructive pulmonary disease (COPD), to their use in therapy, to pharmaceutical compositions containing them and to processes for preparing such compounds.Type: ApplicationFiled: December 8, 2023Publication date: April 25, 2024Inventors: Hans Roland LÖNN, Stephen Connolly, Steven Swallow, Staffan Po Karlsson, Carl-Johan Aurell, John Fritiof PONTÉN, Kevin James Doyle, Amanda Jane VAN DE POËL, Graham Peter Jones, David Wyn Watson, Jacqueline Anne MACRITCHIE, Nicholas John Palmer
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Patent number: 9222396Abstract: A method and a system for estimation of a soot load in a particle filter in an exhaust cleaning system, which estimation involves using a pressure drop across said particle filter in order to determine the soot load. Measurement of the pressure drop across the particle filter and therefore the estimation have to take place at a time when an exhaust mass flow of the exhaust cleaning system exceeds a flow threshold value, the particle filter is substantially free from water and a temperature of the particle filter exceeds a first threshold value. The result is a robust estimate of the soot load in the particle filter.Type: GrantFiled: August 24, 2011Date of Patent: December 29, 2015Assignee: SCANIA CV ABInventors: Carl-Johan Karlsson, Klas Telborn
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Patent number: 9091191Abstract: A method for regeneration of a particle filter (202) pertaining to a combustion process, which filter treats exhaust gases arising from combustion in a combustion engine (101): During regeneration, controlling the engine (101) according to a first mode and a second mode, in the first mode, the engine (101) is controlled such that a high exhaust temperature is generated, determining a temperature of the particle filter (202), and controlling the engine (101) according to the first mode when the temperature determined is below a first value until the temperature reaches a higher second value, and then controlling the engine in the second mode. The invention relates also to a system and a vehicle (100).Type: GrantFiled: August 23, 2011Date of Patent: July 28, 2015Assignee: SCANIA CV ABInventors: Carl-Johan Karlsson, Klas Telborn
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Patent number: 9068494Abstract: A method pertaining to regeneration of a particle filter (202) pertaining to a combustion process, which filter is arranged to treat exhaust gases arising from combustion in a combustion engine (101). When at least one measure for raising the temperature of the particle filter (202) is activated, determining a temperature for the particle filter (202), comparing the temperature determined with a first temperature and discontinuing the measure for raising the temperature of the particle filter (202) when the temperature determined is below the first temperature.Type: GrantFiled: August 23, 2011Date of Patent: June 30, 2015Assignee: SCANIA CV ABInventors: Carl-Johan Karlsson, Klas Telborn
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Patent number: 8640443Abstract: An exhaust gas after treatment system includes a diesel particulate filter unit arranged downstream of a diesel engine, a NO2 reduction catalyst arranged downstream of said diesel particulate filter, a selective catalytic reduction (SCR) arrangement arranged downstream of said NO2 reduction catalyst, a first injector for feeding reducing agent into the exhaust gas arranged downstream said particulate filter and upstream said NO2 reduction catalyst, a second injector for feeding reducing agent into the exhaust gas arranged downstream said NO2 reduction catalyst and upstream said selective catalytic reduction (SCR) arrangement. An exhaust gas after treatment method is also provided.Type: GrantFiled: February 21, 2008Date of Patent: February 4, 2014Assignee: Volvo Lastvagnar ABInventors: Lennart Andersson, Lucas Megas, Jonas Edvardsson, Carl-Johan Karlsson, Anders Tuomivaara, Jonas Jansson
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Patent number: 8596045Abstract: A system and an on-board-diagnosis method is provided for an exhaust aftertreatment system of an engine including a diesel particulate filter unit which encompasses a particulate filter in which soot can be oxidized by NO2 and constituents of the exhaust gas are deoxidized in a nitrogen-oxides reduction unit arranged downstream of the diesel particulate filter unit, wherein the exhaust gas flows from the diesel particulate filter unit to the nitrogen-oxides reduction unit. The on-board-diagnosis method includes estimating an NO2 content upstream of the nitrogen-oxides reduction unit, measuring at least one of an NOx or NO2 content upstream of the nitrogen-oxides reduction unit, performing a comparison between the estimated and the measured contents, and, based on the result of the comparison deciding on at least one conditioning step of the diesel particulate filter unit.Type: GrantFiled: February 21, 2008Date of Patent: December 3, 2013Assignee: Volvo Lastvagnar ABInventors: Anders Tuomivaara, Jonas Jansson, Lucas Megas, Lennart Andersson, Jonas Edvardsson, Carl-Johan Karlsson
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Patent number: 8499556Abstract: A diesel engine system and a method for operating said system are provided. The diesel engine system includes a diesel engine provided with an exhaust conduit including a controllable supercharger located upstream of a catalytic converter, a fuel injector located between the supercharger and the catalytic converter, a diesel particulate filter located downstream of the catalytic converter, and a control unit for controlling the engine system. The control unit is arranged to determine that a regeneration of the particulate filter is required, which regeneration is initiated when a predetermined condition is fulfilled. The fuel injector is arranged to inject a predetermined amount of fuel during a first stage of the regeneration, and the supercharger is arranged to vary the flow rate of exhaust during the injection of fuel. The catalytic converter is arranged to combust the injected fuel, and the combusted fuel is arranged to burn particulates trapped within the diesel particulate filter.Type: GrantFiled: February 5, 2007Date of Patent: August 6, 2013Assignee: Volvo Lastvagnar ABInventors: Björn Henriksson, Carl-Johan Karlsson
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Patent number: 8468806Abstract: A system and a method are provided for operating an exhaust aftertreatment system of an engine in which one or more constituents of the exhaust gas are oxidized in an oxidation catalyst and one or more constituents of the exhaust gas are deoxidized by means of a group of possible chemical reactions of different type between the one or more constituents of the exhaust gas and catalytic material arranged in a selective-catalytic-reduction catalyst, wherein the exhaust gas flows from the oxidation catalyst to the selective-catalytic-reduction catalyst, wherein the steps are performed: (a) adjusting at least one desired ratio among one or more pairs of the one or more constituents by varying a space velocity of the exhaust gas in at least the oxidation catalyst; (b) varying the space velocity of the exhaust gas by varying one or more operation parameters of the engine; and (c) establishing the ratio to a value at least approaching the desired ratio among the one or more pairs of the one or more constituents at thType: GrantFiled: February 21, 2008Date of Patent: June 25, 2013Assignee: Volvo Lastvagnar ABInventors: Lennart Andersson, Jonas Edvardsson, Jonas Jansson, Carl-Johan Karlsson, Lucas Megas, Anders Tuomivaara
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Publication number: 20130152550Abstract: A method for regeneration of a particle filter (202) pertaining to a combustion process, which filter treats exhaust gases arising from combustion in a combustion engine (101): During regeneration, controlling the engine (101) according to a first mode and a second mode, in the first mode, the engine (101) is controlled such that a high exhaust temperature is generated, determining a temperature of the particle filter (202), and controlling the engine (101) according to the first mode when the temperature determined is below a first value until the temperature reaches a higher second value, and then controlling the engine in the second mode. The invention relates also to a system and a vehicle (100).Type: ApplicationFiled: August 23, 2011Publication date: June 20, 2013Inventors: Carl-Johan Karlsson, Klas Telborn
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Publication number: 20130145822Abstract: A method and a system for estimation of a soot load in a particle filter in an exhaust cleaning system, which estimation involves using a pressure drop across said particle filter in order to determine the soot load. Measurement of the pressure drop across the particle filter and therefore the estimation have to take place at a time when an exhaust mass flow of the exhaust cleaning system exceeds a flow threshold value, the particle filter is substantially free from water and a temperature of the particle filter exceeds a first threshold value. The result is a robust estimate of the soot load in the particle filter.Type: ApplicationFiled: August 24, 2011Publication date: June 13, 2013Inventors: Carl-Johan Karlsson, Klas Telborn
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Publication number: 20130145930Abstract: A method pertaining to regeneration of a particle filter (202) pertaining to a combustion process, which filter is arranged to treat exhaust gases arising from combustion in a combustion engine (101). When at least one measure for raising the temperature of the particle filter (202) is activated, determining a temperature for the particle filter (202), comparing the temperature determined with a first temperature and discontinuing the measure for raising the temperature of the particle filter (202) when the temperature determined is below the first temperature.Type: ApplicationFiled: August 23, 2011Publication date: June 13, 2013Inventors: Carl-Johan Karlsson, Klas Telborn
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Publication number: 20110041815Abstract: A diesel engine system and a method for operating said system are provided. The diesel engine system includes a diesel engine provided with an exhaust conduit including a controllable supercharger located upstream of a catalytic converter, a fuel injector located between the supercharger and the catalytic converter, a diesel particulate filter located downstream of the catalytic converter, and a control unit for controlling the engine system. The control unit is arranged to determine that a regeneration of the particulate filter is required, which regeneration is initiated when a predetermined condition is fulfilled. The fuel injector is arranged to inject a predetermined amount of fuel during a first stage of the regeneration, and the supercharger is arranged to vary the flow rate of exhaust during the injection of fuel. The catalytic converter is arranged to combust the injected fuel, and the combusted fuel is arranged to burn particulates trapped within the diesel particulate filter.Type: ApplicationFiled: February 5, 2007Publication date: February 24, 2011Applicant: VOLVO LASTVAGNAR ABInventors: Björn Henriksson, Carl-Johan Karlsson
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Publication number: 20100139250Abstract: A system and a method are provided for operating an exhaust aftertreatment system of an engine in which one or more constituents of the exhaust gas are oxidized in an oxidation catalyst and one or more constituents of the exhaust gas are deoxidized by means of a group of possible chemical reactions of different type between the one or more constituents of the exhaust gas and catalytic material arranged in a selective-catalytic-reduction catalyst, wherein the exhaust gas flows from the oxidation catalyst to the selective-catalytic-reduction catalyst, wherein the steps are performed: (a) adjusting at least one desired ratio among one or more pairs of the one or more constituents by varying a space velocity of the exhaust gas in at least the oxidation catalyst; (b) varying the space velocity of the exhaust gas by varying one or more operation parameters of the engine; and (c) establishing the ratio to a value at least approaching the desired ratio among the one or more pairs of the one or more constituents at thType: ApplicationFiled: February 21, 2008Publication date: June 10, 2010Inventors: Lennart Andersson, Jonas Edvardsson, Jonas Jansson, Carl-Johan Karlsson, Lucas Megas, Anders Tuomivaara
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Publication number: 20100126151Abstract: An exhaust gas after treatment system includes a diesel particulate filter unit arranged downstream of a diesel engine, a NO2 reduction catalyst arranged downstream of said diesel particulate filter, a selective catalytic reduction (SCR) arrangement arranged downstream of said NO2 reduction catalyst, a first injector for feeding reducing agent into the exhaust gas arranged downstream said particulate filter and upstream said NO2 reduction catalyst, a second injector for feeding reducing agent into the exhaust gas arranged downstream said NO2 reduction catalyst and upstream said selective catalytic reduction (SCR) arrangement. An exhaust gas after treatment method is also provided.Type: ApplicationFiled: February 21, 2008Publication date: May 27, 2010Applicant: VOLVO LASTAGNAR ABInventors: Lennart Andersson, Lucas Megas, Jonas Edvardsson, Carl-Johan Karlsson, Anders Tuomivaara, Jonas Jansson
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Publication number: 20100101213Abstract: A system and an on-board-diagnosis method is provided for an exhaust aftertreatment system of an engine including a diesel particulate filter unit which encompasses a particulate filter in which soot can be oxidized by NO2 and constituents of the exhaust gas are deoxidized in a nitrogen-oxides reduction unit arranged downstream of the diesel particulate filter unit, wherein the exhaust gas flows from the diesel particulate filter unit to the nitrogen-oxides reduction unit. The on-board-diagnosis method includes estimating an NO2 content upstream of the nitrogen-oxides reduction unit, measuring at least one of an NOx or NO2 content upstream of the nitrogen-oxides reduction unit, performing a comparison between the estimated and the measured contents, and, based on the result of the comparison deciding on at least one conditioning step of the diesel particulate filter unit.Type: ApplicationFiled: February 21, 2008Publication date: April 29, 2010Applicant: VOLVO LASTVAGNAR ABInventors: Anders Tuomivaara, Jonas Jansson, Lucas Megas, Lennart Andersson, Jonas Edvardsson, Carl-Johan Karlsson
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Publication number: 20060196176Abstract: Apparatus for adjusting the temperature of exhaust gases passing through an exhaust system of a vehicle having an internal combustion engine. The exhaust system is provided with an active regeneration filter for collecting particles from the exhaust gas stream. The apparatus includes a heat exchanger that has a first flow passage for an exhaust gas stream from the exhaust manifold of the engine to the particle filter and a second flow passage for an exhaust gas stream from the particle filter to the outlet pipe of the exhaust system.Type: ApplicationFiled: December 16, 2005Publication date: September 7, 2006Applicant: VOLVO LASTVAGNAR ABInventors: Carl-Johan Karlsson, Paulina Tengstrom