Patents by Inventor Andreas Dahl
Andreas Dahl 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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Patent number: 11876368Abstract: A converter system for transferring power, a vehicle including such a converter system and a method for transferring power in such a converter system. The converter system includes a first DC-DC module, a second DC-DC module and a first control unit. The first DC-DC module is connected to a first high voltage interface of a high voltage system and to a first low voltage interface of a low voltage system. The second DC-DC module is connected to a second high voltage interface of the high voltage system and to a second low voltage interface of the low voltage system. The first high voltage interface and the second interface are independent of each other. The first control unit is connected to the first DC-DC module and configured to supply power via the second DC-DC module in case of a failure in the first DC-DC module.Type: GrantFiled: December 2, 2021Date of Patent: January 16, 2024Assignee: Volvo Car CorporationInventors: Narendar Rao Gannamaneni, Ali Dareini, Arsam Golriz, Johan Sjöstedt, Andreas Ådahl
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Patent number: 11835010Abstract: Disclosed is a four-stroke direct injection engine comprising a camshaft, and exhaust valve, and a control system. The control system is configured to change the timing of the camshaft to advance a closing of the exhaust valve, control a first fuel injection step during a compression stroke of the piston, control a second fuel injection step during a power stroke of the piston, and control a third fuel injection step, after the second fuel injection step, during the power stroke of the piston.Type: GrantFiled: February 17, 2020Date of Patent: December 5, 2023Assignee: Scania CV ABInventors: Andreas Dahl, Michael Vallinder
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Publication number: 20230265802Abstract: The disclosure concerns a method for vibration reduction in a compression ignition four- stroke internal combustion engine. The internal combustion engine comprises exhaust and intake valves controlled by exhaust and intake camshafts. The method comprises, when operating the internal combustion engine below a threshold rotational speed, steps of: changing a timing of the exhaust camshaft to advance closing of the exhaust valve, and - changing a timing of the intake camshaft to delay opening of the intake valve.Type: ApplicationFiled: June 11, 2021Publication date: August 24, 2023Inventors: Håkan Sarby, Andreas Dahl, Ola Jönsson, Fredrik Birgersson, Marcus Ahlin
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Publication number: 20230212999Abstract: Disclosed is a four-stroke direct injection engine comprising a camshaft, and exhaust valve, and a control system. The control system is configured to change the timing of the camshaft to advance a closing of the exhaust valve, control a first fuel injection step during a compression stroke of the piston, control a second fuel injection step during a power stroke of the piston, and control a third fuel injection step, after the second fuel injection step, during the power stroke of the piston.Type: ApplicationFiled: February 17, 2020Publication date: July 6, 2023Applicant: Scania CV ABInventors: Andreas DAHL, Michael VALLINDER
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Patent number: 11686259Abstract: The disclosure concerns an internal combustion engine comprising an exhaust camshaft, an intake camshaft, a turbocharger, and a control system. The turbocharger comprises a compressor. A timing of the exhaust camshaft and a timing of the intake camshaft are controllable by the control system, which is configured to: store a compressor map related to the compressor, store a reference area within the compressor map, and determine at least two parameters. In response to the at least two parameters indicating that a current operational point of the compressor is outside the reference area, the control system changes the timing of the exhaust camshaft to advance closing of the exhaust valve, and the timing of the intake camshaft to delay opening of the intake valve.Type: GrantFiled: October 22, 2020Date of Patent: June 27, 2023Assignee: Scania CV ABInventors: Andreas Dahl, Håkan Sarby
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Patent number: 11619181Abstract: The disclosure concerns variable valve timing of a four-stroke ICE. The ICE comprises: an exhaust valve and an intake valve an exhaust camshaft an intake camshaft and a cylinder arrangement. The cylinder arrangement comprises a combustion chamber a cylinder bore and a piston. The control arrangement is configured to: perform a first sequence of changes in the timings of the exhaust and intake camshafts in order to arrive from a first camshaft timing setting at a second camshaft timing setting based on a first current maximum cylinder pressure within the combustion chamber around top dead centre fire and/or around to dead centre gas exchange.Type: GrantFiled: October 1, 2021Date of Patent: April 4, 2023Assignee: Scania CV ABInventors: Andreas Dahl, Erik Lind, Christopher Ringström
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Publication number: 20230049122Abstract: The disclosure concerns an internal combustion engine comprising an exhaust camshaft, an intake camshaft, a turbocharger, and a control system. The turbocharger comprises a compressor. A timing of the exhaust camshaft and a timing of the intake camshaft are controllable by the control system, which is configured to: store a compressor map related to the compressor, store a reference area within the compressor map, and determine at least two parameters. In response to the at least two parameters indicating that a current operational point of the compressor is outside the reference area, the control system changes the timing of the exhaust camshaft to advance closing of the exhaust valve, and the timing of the intake camshaft to delay opening of the intake valve.Type: ApplicationFiled: October 22, 2020Publication date: February 16, 2023Applicant: Scania CV ABInventors: Andreas DAHL, Håkan SARBY
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Publication number: 20220145823Abstract: Disclosed is a four-stroke direct injection engine comprising a camshaft, and exhaust valve, and a control system. The control system is configured to change the timing of the camshaft to advance a closing of the exhaust valve, control a first fuel injection step during a compression stroke of the piston, control a second fuel injection step during a power stroke of the piston, and control a third fuel injection step, after the second fuel injection step, during the power stroke of the piston.Type: ApplicationFiled: February 17, 2020Publication date: May 12, 2022Applicant: Scania CV ABInventors: Andreas DAHL, Michael VALLINDER
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Publication number: 20220112847Abstract: The disclosure concerns variable valve timing of a four-stroke ICE. The ICE comprises: an exhaust valve and an intake valve an exhaust camshaft an intake camshaft and a cylinder arrangement. The cylinder arrangement comprises a combustion chamber a cylinder bore and a piston. The control arrangement is configured to: perform a first sequence of changes in the timings of the exhaust and intake camshafts in order to arrive from a first camshaft timing setting at a second camshaft timing setting based on a first current maximum cylinder pressure within the combustion chamber around top dead centre fire and/or around to dead centre gas exchange.Type: ApplicationFiled: October 1, 2021Publication date: April 14, 2022Applicant: Scania CV ABInventors: Andreas DAHL, Erik LIND, Christopher RINGSTRÖM
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Patent number: 11008933Abstract: A four stroke internal combustion engine is disclosed comprising at least one cylinder arrangement, an exhaust conduit, and at least one turbine. The cylinder arrangement comprises an exhaust port arrangement configured to open and close an exhaust flow area, ACYL. The cylinder arrangement has a maximum volume, VMAX. The exhaust conduit extends between the exhaust flow area, ACYL, and a turbine wheel inlet area, ATIN, of the turbine and has an exhaust conduit volume, VEXH that is ?0.5 times the maximum volume, VMAX. The exhaust port arrangement is configured to expose the exhaust flow area, ACYL, at a size of at least 0.22 times the maximum volume, VMAX, when a piston of the cylinder arrangement is at the bottom dead centre, BDC.Type: GrantFiled: October 5, 2016Date of Patent: May 18, 2021Assignee: Scania CV ABInventors: Eric Olofsson, Daniel Norling, Michael Vallinder, Jonas Aspfors, Johan Linderyd, Henrik Höglund, Per-Inge Larsson, Andreas Dahl, Martin Stenberg
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Patent number: 10837323Abstract: A four-stroke internal combustion engine is disclosed. A camshaft and a crankshaft if the engine are synchronized to rotate at a same rotational speed. A first linkage arrangement is configured to change the motion of an exhaust valve head. A second linkage arrangement is configured to change the motion of the intake valve head. A control unit is configured for controlling the first linkage arrangement to selectively prevent the motion of the exhaust valve head and for controlling the second linkage arrangement to selectively prevent the motion of the intake valve head.Type: GrantFiled: March 27, 2018Date of Patent: November 17, 2020Assignee: Scania CV ABInventors: Andreas Dahl, Eric Olofsson
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Patent number: 10837324Abstract: A four-stroke internal combustion engine is disclosed. A camshaft and a crankshaft if the engine are synchronised to rotate at a same rotational speed. A first linkage arrangement is configured to change the motion of an exhaust valve head. A second linkage arrangement is configured to change the motion of the intake valve head. A control unit is configured for controlling the first linkage arrangement to selectively prevent or reduce the motion of the exhaust valve head and for controlling the second linkage arrangement to selectively prevent or reduce the motion of the intake valve head.Type: GrantFiled: March 27, 2018Date of Patent: November 17, 2020Assignee: Scania CV ABInventors: Andreas Dahl, Eric Olofsson
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Publication number: 20200049080Abstract: A four-stroke internal combustion engine is disclosed. A camshaft and a crankshaft if the engine are synchronised to rotate at a same rotational speed. A first linkage arrangement is configured to change the motion of an exhaust valve head. A second linkage arrangement is configured to change the motion of the intake valve head. A control unit is configured for controlling the first linkage arrangement to selectively prevent or reduce the motion of the exhaust valve head and for controlling the second linkage arrangement to selectively prevent or reduce the motion of the intake valve head.Type: ApplicationFiled: March 27, 2018Publication date: February 13, 2020Applicant: Scania CV ABInventors: Andreas DAHL, Eric OLOFSSON
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Publication number: 20200040774Abstract: A four-stroke internal combustion engine is disclosed. A camshaft and a crankshaft if the engine are synchronized to rotate at a same rotational speed. A first linkage arrangement is configured to change the motion of an exhaust valve head. A second linkage arrangement is configured to change the motion of the intake valve head. A control unit is configured for controlling the first linkage arrangement to selectively prevent the motion of the exhaust valve head and for controlling the second linkage arrangement to selectively prevent the motion of the intake valve head.Type: ApplicationFiled: March 27, 2018Publication date: February 6, 2020Applicant: Scania CV ABInventors: Andreas DAHL, Eric OLOFSSON
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Publication number: 20190316529Abstract: The present invention relates to method for controlling a compression-ignition internal combustion engine, said internal combustion engine having at least one combustion chamber, wherein intake of air to said combustion chamber is controlled using an intake valve, and wherein evacuation of said combustion chamber is controlled using an exhaust valve. The method includes: controlling opening of said intake valve and closing of said exhaust valve in dependence of the position of a reciprocating member in said combustion chamber, wherein opening of said intake valve and closing of said exhaust valve, respectively, in relation to the position of said reciprocating member is individually controllable, and wherein, in one mode of operation, opening of said intake valve and closing of said exhaust valve, respectively, are controlled such that both valves are simultaneously open during a period of variable length.Type: ApplicationFiled: October 11, 2017Publication date: October 17, 2019Applicant: SCANIA CV ABInventors: John GAYNOR, Torbjörn ELIASSEN, Andreas DAHL
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Publication number: 20190316528Abstract: The present invention relates to a method for controlling a compression-ignition internal combustion engine, having at least one combustion chamber, wherein intake of air to said combustion chamber is controlled using an intake valve, and evacuation of said combustion chamber is controlled using an exhaust valve. The method comprises: controlling opening of said intake valve and closing of said exhaust valve in dependence of the position of a reciprocating member in said combustion chamber, wherein opening of said intake valve and closing of said exhaust valve, respectively, in relation to the position of said reciprocating member is individually controllable, and controlling opening and closing in relation to the position of said reciprocating member on the basis of a first control parameter, wherein said opening and closing of said intake valve and exhaust valve, respectively, are controlled such that an actual value of said control parameter is adjusted towards a desired value.Type: ApplicationFiled: October 11, 2017Publication date: October 17, 2019Applicant: SCANIA CV ABInventors: John GAYNOR, Torbjörn ELIASSEN, Andreas DAHL
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Publication number: 20190153906Abstract: Provided is a four stroke internal combustion engine comprising at least one cylinder arrangement, a crankshaft, a camshaft, and a turbine. The camshaft is synchronized with the crankshaft to rotate at a same rotational speed as the crankshaft. A linkage arrangement is configured to prevent the motion of the valve head every alternate rotation of the camshaft, such that the exhaust opening remains closed during a compression stroke of the piston. Also a method for controlling a four stroke internal combustion engine is disclosed.Type: ApplicationFiled: May 8, 2017Publication date: May 23, 2019Applicant: Scania CV ABInventors: Eric OLOFSSON, Andreas DAHL, Johan LINDERYD, Henrik HÖGLUND, Torbjörn ELIASSEN, Per STÅLHAMMAR, Jonas ASPFORS
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Publication number: 20180320579Abstract: A four stroke internal combustion engine is disclosed comprising at least one cylinder arrangement, an exhaust conduit, and at least one turbine. The cylinder arrangement comprises an exhaust port arrangement configured to open and close an exhaust flow area, ACYL. The cylinder arrangement has a maximum volume, VMAX. The exhaust conduit extends between the exhaust flow area, ACYL, and a turbine wheel inlet area, ATIN, of the turbine and has an exhaust conduit volume, VEXH that is ?0.5 times the maximum volume, VMAX. The exhaust port arrangement is configured to expose the exhaust flow area, ACYL, at a size of at least 0.22 times the maximum volume, VMAX, when a piston of the cylinder arrangement is at the bottom dead centre, BDC.Type: ApplicationFiled: October 5, 2016Publication date: November 8, 2018Applicant: Scania CV ABInventors: Eric OLOFSSON, Daniel NORLING, Michael VALLINDER, Jonas ASPFORS, Johan LINDERYD, Henrik HÖGLUND, Per-Inge LARSSON, Andreas DAHL, Martin STENBERG
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Patent number: 8965966Abstract: A computer system including instructions recorded on a non-transitory computer-readable storage medium and readable by at least one processor, the system including a logging module, a receiving module, and a transmission module. The logging module is configured to log information associated with a scheduler. The receiving module is configured to receive a request for information associated with the scheduler. The transmission module is configured to transmit information associated with the scheduler.Type: GrantFiled: December 15, 2010Date of Patent: February 24, 2015Assignee: SAP SEInventors: Sasan Memar-Zahedani, Andreas Dahl
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Patent number: 8793325Abstract: A system and method for filtering messages in a messaging system is described. The system includes a user interface configured to receive user input for defining one or more message filters. Each message filter specifies predefined criteria by which a message is to be stopped. The system further includes a filter module comprising the one or more filters, and a queue connected with the filter module for queuing messages stopped according to one of the one or more filters. In a method, messages in the messaging system are stopped according to predefined criteria. Stopped messages are restarted according to a job executed by the messaging system.Type: GrantFiled: July 26, 2004Date of Patent: July 29, 2014Assignee: SAP AGInventors: Joerg Kessler, Stefan Rossmanith, Christoph Hofmann, Peter Surma, Andreas Dahl