Patents by Inventor Jonas Jansson

Jonas Jansson 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).

  • Publication number: 20230399972
    Abstract: An engine system includes a hydrogen combustion engine and an exhaust aftertreatment system, EATS, configured to reduce emissions of the engine exhausts. The EATS comprises: an exhaust gas inlet for receiving engine exhaust from the hydrogen combustion engine; a plurality of emission reducing modules arranged downstream of the exhaust gas inlet and being configured to reduce emissions of the engine exhausts, the plurality of emission reducing modules comprising at least a first emission reducing module with a porous substrate including a powder coating and a selective catalyst reduction, SCR, coating, and a second emission reducing module being a selective catalyst reduction, SCR, catalyst unit. At least one of the first and second emission reducing modules is arranged as the first occurring emission reducing module of the EATS downstream of the exhaust gas inlet.
    Type: Application
    Filed: June 12, 2023
    Publication date: December 14, 2023
    Applicant: Volvo Truck Corporation
    Inventors: Lennart ANDERSSON, Jonas Jansson
  • Patent number: 11702973
    Abstract: A method for controlling urea injection in an exhaust aftertreatment system includes injecting urea at a flow rate upstream of the first catalytic reduction device; measuring a level of nitrogen oxides downstream of the first catalytic reduction device and upstream of the second catalytic reduction device; controlling the flow rate of the urea injection until the measured level of nitrogen oxides fulfils a predetermined condition; if the measured level of nitrogen oxides is decreasing in response to reducing the flow rate of the urea injection, reducing the flow rate of the urea injection, and controlling a flow rate of urea injection using the second urea injector upstream of the second catalytic reduction device according to the measured level of nitrogen oxides downstream of the first catalytic reduction device and upstream of the second catalytic reduction device.
    Type: Grant
    Filed: May 20, 2022
    Date of Patent: July 18, 2023
    Assignee: VOLVO TRUCK CORPORATION
    Inventors: Jonas Jansson, Björn Henriksson, Lars Carlhammar
  • Publication number: 20220381171
    Abstract: A method for controlling urea injection in an exhaust aftertreatment system includes injecting urea at a flow rate upstream of the first catalytic reduction device; measuring a level of nitrogen oxides downstream of the first catalytic reduction device and upstream of the second catalytic reduction device; controlling the flow rate of the urea injection until the measured level of nitrogen oxides fulfils a predetermined condition; if the measured level of nitrogen oxides is decreasing in response to reducing the flow rate of the urea injection, reducing the flow rate of the urea injection, and controlling a flow rate of urea injection using the second urea injector upstream of the second catalytic reduction device according to the measured level of nitrogen oxides downstream of the first catalytic reduction device and upstream of the second catalytic reduction device.
    Type: Application
    Filed: May 20, 2022
    Publication date: December 1, 2022
    Applicant: VOLVO TRUCK CORPORATION
    Inventors: Jonas JANSSON, Björn HENRIKSSON, Lars CARLHAMMAR
  • Patent number: 8640443
    Abstract: 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: Grant
    Filed: February 21, 2008
    Date of Patent: February 4, 2014
    Assignee: Volvo Lastvagnar AB
    Inventors: Lennart Andersson, Lucas Megas, Jonas Edvardsson, Carl-Johan Karlsson, Anders Tuomivaara, Jonas Jansson
  • Patent number: 8601796
    Abstract: A selective catalytic reduction system for reducing nitric oxides emission levels from a compression ignition engine includes a first reductant injector located upstream a first catalyst including a selective catalytic reduction coating. A second reductant injector is located downstream the first catalyst; and a second catalyst is placed downstream the second reductant injector and includes a selective catalytic reduction coating.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: December 10, 2013
    Assignee: Volvo Lastvagnar AB
    Inventors: Andreas Hinz, Jonas Jansson, Hans Bernler, Ulrich Gobert
  • Patent number: 8596045
    Abstract: 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: Grant
    Filed: February 21, 2008
    Date of Patent: December 3, 2013
    Assignee: Volvo Lastvagnar AB
    Inventors: Anders Tuomivaara, Jonas Jansson, Lucas Megas, Lennart Andersson, Jonas Edvardsson, Carl-Johan Karlsson
  • Patent number: 8468806
    Abstract: 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 th
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: June 25, 2013
    Assignee: Volvo Lastvagnar AB
    Inventors: Lennart Andersson, Jonas Edvardsson, Jonas Jansson, Carl-Johan Karlsson, Lucas Megas, Anders Tuomivaara
  • Publication number: 20100139250
    Abstract: 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 th
    Type: Application
    Filed: February 21, 2008
    Publication date: June 10, 2010
    Inventors: Lennart Andersson, Jonas Edvardsson, Jonas Jansson, Carl-Johan Karlsson, Lucas Megas, Anders Tuomivaara
  • Publication number: 20100126151
    Abstract: 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: Application
    Filed: February 21, 2008
    Publication date: May 27, 2010
    Applicant: VOLVO LASTAGNAR AB
    Inventors: Lennart Andersson, Lucas Megas, Jonas Edvardsson, Carl-Johan Karlsson, Anders Tuomivaara, Jonas Jansson
  • Publication number: 20100101213
    Abstract: 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: Application
    Filed: February 21, 2008
    Publication date: April 29, 2010
    Applicant: VOLVO LASTVAGNAR AB
    Inventors: Anders Tuomivaara, Jonas Jansson, Lucas Megas, Lennart Andersson, Jonas Edvardsson, Carl-Johan Karlsson
  • Publication number: 20100064662
    Abstract: A selective catalytic reduction system for reducing nitric oxides emission levels from a compression ignition engine includes a first reductant injector located upstream a first catalyst including a selective catalytic reduction coating. A second reductant injector is located downstream the first catalyst; and a second catalyst is placed downstream the second reductant injector and includes a selective catalytic reduction coating.
    Type: Application
    Filed: June 13, 2006
    Publication date: March 18, 2010
    Applicant: Volvo Lastvagnar AB
    Inventors: Andreas Hinz, Jonas Jansson, Hans Bernler, Ulrich Gobert
  • Patent number: 7647178
    Abstract: A method and system for autonomous collision avoidance in multiple obstacle scenarios. A forward collision avoidance system detects obstacles in front of a vehicle hosting the system and estimates a position, a velocity and an acceleration of each of the obstacles. The maneuvers which the vehicle is capable of performing that will lead to a collision with each respective obstacle are evaluated separately. The union of maneuvers which will lead to collision with any one of the obstacles is formed. The set of maneuvers which the vehicle is capable of performing through which collision with any of the obstacles may be avoided is established, and the set used for deciding how to avoid or mitigate collision with any one of the obstacles. Finally, a collision avoidance maneuver based on the decision is executed autonomously.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: January 12, 2010
    Assignee: Ford Global Technologies, LLC
    Inventors: Jonas Ekmark, Jonas Jansson
  • Publication number: 20070112514
    Abstract: The present patent application relates to a method and system for autonomous action in multiple obstacle scenarios in an automotive vehicle forward collision avoidance system. Initially the presence of obstacles in front of a vehicle hosting the system is established. Thereafter the position, velocity and acceleration of the obstacles are estimated. The maneuvers which the vehicle is capable of performing that will lead to a collision with each respective obstacle is evaluated separately. The union of maneuvers which will lead to collision with any one of the obstacles is formed. The set of maneuvers which the vehicle is capable of performing through which collision with any of the obstacles may be avoided is established, and the set used for deciding how to avoid or mitigate collision with any one of the obstacles. Finally a collision avoidance maneuver based on said decision is executed autonomously.
    Type: Application
    Filed: April 28, 2006
    Publication date: May 17, 2007
    Inventors: Jonas Ekmark, Jonas Jansson
  • Publication number: 20050033499
    Abstract: The invention relates to a method for estimating road-to-tire friction between tires of a wheeled vehicle and a road surface, which vehicle is provided with a collision avoidance system. The method includes the steps of applying a positive torque to both wheels on a first axle and an equal and opposite negative torque to at least one wheel on a second axle. The method further includes measuring current values for vehicle speed, angular acceleration of the wheel on the second axle and the negative torque applied to said wheel. The method also includes determining a current friction coefficient using a friction coefficient determining device. The invention further relates to an apparatus for using the method.
    Type: Application
    Filed: May 27, 2004
    Publication date: February 10, 2005
    Inventors: Jonas Ekmark, Jonas Jansson