Patents by Inventor Per Persson

Per Persson 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).

  • Patent number: 7434398
    Abstract: Method for controlling the braking effect during engine braking in an internal combustion engine (10) having an exhaust turbocharger unit (16) with adjustable guide blades for controlling the turbine speed and gas flow. The method includes detection of the engine speed, detection of the adjustment position of the guide blades, measurement either of the charging pressure on the intake side of the engine or the manifold pressure on the exhaust side of the engine, comparison of these data with stored desired values, and adjustment of the guide blades to a desired position which gives a suitable braking effect for the prevailing charging pressure.
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: October 14, 2008
    Assignee: Volvo Lastvagnar AB
    Inventors: Goran Olsson, Per Persson, Per-Olof Kallen
  • Publication number: 20080230021
    Abstract: In a method for operating an internal combustion engine, the engine includes a plurality of cylinders each of which having at least one valve of a first type, an inlet valve, and at least one valve of a second type, an exhaust valve, arranged in an end part of the cylinder, each of the cylinders further having a piston movably arranged therein, the piston being adapted to reciprocate between a first end position and a second end position, wherein the first end position is located closer to the valves than the lower end position, the engine being adapted to allow deactivation of at least one cylinder by reducing its supply of fuel, the engine further being adapted to allow varying opening times of the inlet valves and/or the exhaust valves.
    Type: Application
    Filed: September 12, 2005
    Publication date: September 25, 2008
    Applicant: VOLVO LASTVAGNAR AB
    Inventor: Per Persson
  • Publication number: 20080209894
    Abstract: In a method and a device for regeneration of a regeneratable unit which forms part of an exhaust aftertreatment system, the unit is arranged upstream of a catalytic rector in an exhaust duct connected to an internal combustion engine. Part of the inlet air of the internal combustion engine is during regeneration conducted to the exhaust duct for regulating the temperature in the gas flow to the catalytic reactor.
    Type: Application
    Filed: May 26, 2005
    Publication date: September 4, 2008
    Applicant: VOLVO LASTVAGNAR AB
    Inventor: Per Persson
  • Publication number: 20080110161
    Abstract: An arrangement for controlling exhaust pressure pulsation in a combustion engine including six cylinders. The engine also includes an inlet for supply of air to the cylinders, and an exhaust manifold for delivery of exhaust gases from the cylinders. The manifold is provided with a first outlet to an exhaust system and with a second outlet to a conduit for feeding exhaust gases back, via an EGR circuit, from at least one of the engine's cylinders to the inlet. At least one of the cylinders is adapted to enrich the exhaust gases with unburnt hydrocarbon with a view to regeneration of an exhaust gas post-treatment unit situated in the exhaust system. A special configuration of the exhaust manifold results in separation of regeneration gas from EGR gas in the exhaust manifold.
    Type: Application
    Filed: July 2, 2004
    Publication date: May 15, 2008
    Applicant: VOLVO LASTVAGNAR AB
    Inventor: Per Persson
  • Patent number: 7331172
    Abstract: A system and method for the regeneration of a particle filter (13) arranged downstream from a catalyzer unit (14) in an exhaust canal (10) arranged to an internal combustion engine (2), where the internal combustion engine (2) is arranged to assume a first operational mode (60) in which a driving torque is emitted and a second operational mode (80) constituting engine braking where the internal combustion engine (2) supplies compression work to a gas mixture which flows through the exhaust canal (10) without a corresponding expansion work having been emitted from the gas mixture, and a vehicle where the method is utilized.
    Type: Grant
    Filed: November 6, 2004
    Date of Patent: February 19, 2008
    Assignee: Volvo Lastvagnar AB
    Inventor: Per Persson
  • Publication number: 20070232274
    Abstract: The invention discloses a delivery concept that enables a sender of a mobile message to define a specific condition for the mobile message to be notified to the recipient. A set of context parameters defined for the electronic messaging system (e.g., short message service, multimedia message service) can be employed to a messaging application. Before the user sends a message, the user selects delivery condition(s) to be used and sets its/their value. The user as a sender will choose at least one delivery condition that is appropriate to the content of the message and is effective to condition the suitable context of the recipient when the message is received and, potentially, read. The message may be delivered to the recipient's terminal device instantly but it is not shown to the recipient until at least one context least one of the sender-defined delivery conditions is met.
    Type: Application
    Filed: April 29, 2004
    Publication date: October 4, 2007
    Inventors: Younghee Jung, Per Persson
  • Publication number: 20070232347
    Abstract: A mobile device adapted to provide an indication of the proximate co-presence of a buddy—another user who has agreed to be indicated as nearby—using a short-range (local) transceiver to scan for a low-level identifier associated with a compatible short-range transceiver in a mobile device operated by the buddy. The mobile device provides an indication of proximate co-presence of another only in case of permission.
    Type: Application
    Filed: October 7, 2004
    Publication date: October 4, 2007
    Inventors: Per Persson, Younghee Jung
  • Patent number: 7212896
    Abstract: A vehicle control system (10) including a vehicle motion control subsystem (12) that has an input receiving an intended driving demand (14) and a plurality of coordinator subsystems (16) for coordinating actuators of the vehicle. The vehicle motion control subsystem (12) communicates with the coordinator subsystems (16) to determine whether a single coordinator subsystem (16) can carry out the intended driving demand (14). The vehicle motion control subsystem (12) will distribute demand signals among one or more of the coordinator subsystems (16) to allow the vehicle to implement the intended driving demand (14).
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: May 1, 2007
    Assignee: Ford Global Technologies, LLC
    Inventors: Erik Coelingh, Jonas Ekmark, Mats Andersson, Jan Ryderstam, Per Olsson, Per Persson, Soren Eriksson
  • Publication number: 20070028878
    Abstract: An exhaust valve mechanism for an internal combustion engine with at least one exhaust valve in every engine cylinder includes a main rocker arm mounted on a rocker arm shaft and a secondary rocker arm arranged on the main rocker arm and mounted on the rocker arm shaft for the activation of an exhaust brake function. A spring device is so arranged as to act between a fixed point on the engine and the secondary rocker arm, in such a way that the latter rocker arm is caused by the spring force to engage with the cam element of the camshaft.
    Type: Application
    Filed: August 23, 2006
    Publication date: February 8, 2007
    Applicant: VOLVO LASTVAGNAR AB
    Inventors: Per Persson, Hans Bondeson, Anders Nobelius, Johan Grankvist
  • Publication number: 20070006576
    Abstract: Method and arrangement for regenerating a particle filter (15) arranged in thermal proximity to a catalyst unit (16) in an exhaust duct (10) connected to an internal combustion engine (2). The particle filter is located downstream of an adjustable exhaust pressure regulator (20) for regulating an exhaust flow through the exhaust duct. When the internal combustion engine is driven at low engine load, the exhaust pressure regulator (20) is activated with a predetermined regulating pressure. Fuel is then supplied to the exhaust duct (10) by means of an injection unit, the catalyst unit (16) being exposed to the fuel, which is oxidized, and the particle filter (15) being heated to such a temperature that soot particles are converted into carbon dioxide in reaction with oxygen contained in the exhaust flow.
    Type: Application
    Filed: May 4, 2005
    Publication date: January 11, 2007
    Applicant: VOLVO LASTVAGNAR AB
    Inventors: Per PERSSON, Bo SVENSSON, Christer ALM
  • Patent number: 7150272
    Abstract: Method and arrangement for delivering EGR gas to combustion spaces in a multi-cylinder, four-stroke internal combustion engine. Each cylinder, with an associated piston, has at least one inlet valve and at least one exhaust valve (10) for controlling fluid interconnection between the combustion space in the cylinder and an intake system and an exhaust system, respectively. A rotatable camshaft (18) having a cam curve (23) is designed to interact with a cam follower (17) for operation of the exhaust valve (10) during a first opening and closing phase. The cam curve (23) is also designed to interact with a second cam follower (20) during a second opening and closing phase which is phase-offset in relation to the first aforementioned opening and closing phase. This configuration facilitates the cylinder being connected to the exhaust system during the induction stroke, once the exhaust stroke is completed.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: December 19, 2006
    Assignee: Volvo Lastvågnar AB
    Inventor: Per Persson
  • Patent number: 7146945
    Abstract: The invention relates to an apparatus for an internal combustion engine which for each cylinder with associated piston has at least one inlet valve and at least one exhaust valve for controlling the connection between the combustion chamber in the cylinder and an intake system and an exhaust system respectively. A rotatable camshaft with a cam lobe is designed to interact with a main rocker arm and a secondary rocker arm, the two rocker arms serving to transmit the movement of the cam lobe to the inlet/exhaust valve. The cam lobe is arranged to act on both of the rocker arms during each revolution of the camshaft. The secondary rocker arm interacts with a hydraulic piston, which is displaceable in a hydraulic cylinder and which forms part of a hydraulic circuit having a hydraulic fluid source, and which permits switching between at least two different working positions.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: December 12, 2006
    Assignee: Volvo Lastvagnar AB
    Inventor: Per Persson
  • Patent number: 7140333
    Abstract: Method and apparatus for providing an internal combustion engine which for each cylinder, with the associated piston, has at least one inlet valve and at least one exhaust valve (10) for controlling the connection between the combustion chamber in the cylinder and an intake system and an exhaust system, respectively. A rotatable camshaft (18) with a cam (22) is designed to interact with a first cam follower (17) and a second cam follower (20) in order to switch between two different operating modes. The cam followers are mounted on a pivotal rocker arm (13), the second cam follower (20) being hydraulically adjustable between two positions by means of a piston (21) located in a hydraulic cylinder. The hydraulic cylinder is connected to a hydraulic fluid source via a hydraulic fluid duct and the piston can be moved from one position to the other by the action of a quantity of hydraulic fluid delivered to the hydraulic cylinder.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: November 28, 2006
    Assignee: Volvo Lastvagnar AB
    Inventors: Per Persson, Jan Arnell, Johan Remmelgas
  • Publication number: 20060201151
    Abstract: Method for controlling the braking effect during engine braking in an internal combustion engine (10) having an exhaust turbocharger unit (16) with adjustable guide blades for controlling the turbine speed and gas flow. The method includes detection of the engine speed, detection of the adjustment position of the guide blades, measurement either of the charging pressure on the intake side of the engine or the manifold pressure on the exhaust side of the engine, comparison of these data with stored desired values, and adjustment of the guide blades to a desired position which gives a suitable braking effect for the prevailing charging pressure.
    Type: Application
    Filed: May 26, 2006
    Publication date: September 14, 2006
    Applicant: VOLVO LASTVAGNAR AB
    Inventors: Goran OLSSON, Per PERSSON, Per-Olof KALLEN
  • Publication number: 20060179823
    Abstract: A piston-type internal combustion engine (10) having an intake line (20) for delivering air to combustion chambers of the engine and an exhaust system (15, 22) for removing exhaust gases from said combustion chambers. The exhaust system includes equipment (29, 30) for reducing environmentally harmful exhaust emissions from the engine, which is intended to function with variable load in order to propel a vehicle. The exhaust system (15, 22) has a branch pipe (26) controlled by a valve (24) and bypassing at least one part of the equipment (29, 30) for reducing environmentally harmful exhaust emissions. The valve (24) is controlled so that it leads the exhaust gas flow through the branch pipe (26) over a part of the overall load range of the engine. The engine is optimized in order to give acceptable exhaust emissions over said part of the overall load range of the engine.
    Type: Application
    Filed: March 9, 2006
    Publication date: August 17, 2006
    Applicant: VOLVO LASTVAGNAR AB
    Inventors: Andreas HINZ, Per SALOMONSSON, Lennart ANDERSSON, Per PERSSON
  • Publication number: 20060148528
    Abstract: The invention provides a presentation of contextual information to a digital device in relation to a period of time. As such the invention provides for efficient user access to historical, as well as, current and future or forecasted contextual information. In addition, the present invention provides for current contextual information to be presented in an idle mode view, a scrolling bar mode view or another inconspicuous view. Additionally the present invention provides a novel means of using context information to create multimedia file presentations; image or video file presentations that can be associated with previous periods of time, locations or other context data.
    Type: Application
    Filed: December 31, 2004
    Publication date: July 6, 2006
    Applicant: Nokia Corporation
    Inventors: Younghee Jung, Per Persson, Petri Piippo, Petri Maenpaa
  • Patent number: 7063072
    Abstract: Diesel engine with unit injectors and a catalytic converter arranged in the engine exhaust system, for reaction with uncombusted fuel. The injectors have spill valves, which in their closed position build up pressure in the injectors, and needle control valves, which in their closed position keep the needle valves of the injectors closed and which, when they are open, open the needle valves. The unit injectors have pump plungers, which are driven by individual cam elements whit a cam curve shaped so that a pressure is maintained in the injects for so long a period during one cycle that injection of fuel is permitted at least when an associated exhaust valve in the combustion chamber begins to open so late during the expansion stroke and temperature drop, that fuel after injection is not combusted in the cylinder but reaches the catalytic converted uncombusted.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: June 20, 2006
    Assignee: Volvo Lastvagnar AB
    Inventors: Per Persson, Jan Wiman, Jonas Rick
  • Publication number: 20060112918
    Abstract: The invention relates to an apparatus for an internal combustion engine which for each cylinder with associated piston has at least one inlet valve and at least one exhaust valve for controlling the connection between the combustion chamber in the cylinder and an intake system and an exhaust system respectively. A rotatable camshaft with a cam lobe is designed to interact with a main rocker arm and a secondary rocker arm, the two rocker arms serving to transmit the movement of the cam lobe to the inlet/exhaust valve. The cam lobe is arranged to act on both of the rocker arms during each revolution of the camshaft. The secondary rocker arm interacts with a hydraulic piston, which is displaceable in a hydraulic cylinder and which forms part of a hydraulic circuit having a hydraulic fluid source, and which permits switching between at least two different working positions.
    Type: Application
    Filed: February 13, 2006
    Publication date: June 1, 2006
    Applicant: VOLVO LASTVAGNAR AB
    Inventor: Per Persson
  • Publication number: 20060052057
    Abstract: A wireless communication device (11) including a proximity application (11c) using a short-range radio link and using group codes (11d) for a simple determination of potential common interests with users of correspondingly configured wireless communication devices (12). The group codes (11d) indicate membership in a group of people having at least one common attribute or interest.
    Type: Application
    Filed: September 3, 2004
    Publication date: March 9, 2006
    Inventors: Per Persson, Younghee Jung
  • Publication number: 20060048141
    Abstract: A method and corresponding equipment by which software (11c) on a first device (11) is virally or otherwise distributed to a second device (12), in which the first device (11) and second device (12) and possibly also a server (16) of the software (11c) exchange information sufficient for the first device (11) to determine whether it includes or stores a version of the software (22c) compatible with the second device (12), and if so, then provides a compatible version, but otherwise exchanges information with the second device sufficient for the second device to obtain a copy from the server (16).
    Type: Application
    Filed: August 24, 2004
    Publication date: March 2, 2006
    Inventors: Per Persson, Younghee Jung, Jim Lundin