Patents by Inventor Kim KYLSTROM

Kim KYLSTROM 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: 11698038
    Abstract: The invention relates to a method for operating a fuel supply pump of a vehicle, the vehicle comprising a combustion engine system and a gearbox, the method comprising the steps of: determining one or more operational values of at least one operational parameter of the combustion engine system; determining a reduction of a fuel provision rate to the combustion engine system; determining whether a gear step change of the gearbox is at hand, on the basis of the determined one or more operational values of the at least one operational parameter; and in case a gear step change of the gearbox is at hand, controlling operation of the fuel supply pump so as to maintain fuel supply pump speed.
    Type: Grant
    Filed: November 23, 2020
    Date of Patent: July 11, 2023
    Assignee: Scania CV AB
    Inventors: Adam Berg, Kim Kylström, Peter Gustafsson
  • Publication number: 20220389880
    Abstract: The invention relates to a method for operating a fuel supply pump of a vehicle, the vehicle comprising a combustion engine system and a gearbox, the method comprising the steps of: determining one or more operational values of at least one operational parameter of the combustion engine system; determining a reduction of a fuel provision rate to the combustion engine system; determining whether a gear step change of the gearbox is at hand, on the basis of the determined one or more operational values of the at least one operational parameter; and in case a gear step change of the gearbox is at hand, controlling operation of the fuel supply pump so as to maintain fuel supply pump speed.
    Type: Application
    Filed: November 23, 2020
    Publication date: December 8, 2022
    Applicant: Scania CV AB
    Inventors: Adam BERG, Kim KYLSTRÖM, Peter GUSTAFSSON
  • Publication number: 20200408181
    Abstract: A system for protecting a high-pressure accumulator fuel injection system of an internal combustion engine against excessively high fuel pressures occurring in a high-pressure accumulator of the fuel injection system caused by a malfunction in the fuel injection, wherein the system comprises a member measuring the fuel pressure inside the high-pressure accumulator and sending information about this pressure to a control unit. An electrically controllable inlet valve to a pumping element of a high-pressure pump is included in the system and controlled by the control unit to be transferred to a continuously open or closed state, if the pressure measured exceeds a predetermined pressure level for stopping the feeding of fuel by the pumping element to the high-pressure accumulator.
    Type: Application
    Filed: February 2, 2017
    Publication date: December 31, 2020
    Inventors: Kim KYLSTRÖM, Ulf CARLSSON
  • Patent number: 10815947
    Abstract: The present invention relates to a high pressure fuel pump comprising an inlet channel in connection with a first chamber, through which inlet channel fuel is led to the first chamber, a second chamber arranged in connection with the first chamber, an outlet valve arranged in connection with the second chamber and an inlet valve comprising a piston, with a first end section and a second end section. The piston is moveably arranged with the first end section in a third chamber, and the second end section is moveably arranged between the first chamber and the second chamber. A press element is arranged to act on the piston with a mechanic force, so that the piston strives to be positioned with the second end section closing the connection between the first chamber and the second chamber. The inlet valve is in a closed state and may be controlled via an electromagnetic unit.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: October 27, 2020
    Assignee: Scania CV AB
    Inventor: Kim Kylström
  • Patent number: 10704490
    Abstract: Provided is a method for diagnosing unintended fuelling from one or more fuel injectors of a multi cylinder internal combustion engine during engine operation. Pressurized fuel is intended to be distributed by means of said fuel injectors from said accumulator tank to the cylinders for combustion. An oxidation catalyst is arranged downstream said cylinders. The method comprises: determining the pressure in the fuel accumulator tank and whether said pressure is decreasing; and determining whether the actual amount of fuel provided by the pump unit exceeds the demanded amount of fuel. The method further comprises the steps of: determining whether the temperature associated with the oxidation catalyst is above a certain level and/or determining whether the air/fuel ratio is below a certain level and/or determining whether an amount of particulate matter is above a certain level; and confirming an unintended fuelling based on the determined conditions.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: July 7, 2020
    Assignee: Scania CV AB
    Inventors: Kim Kylström, Roger Hälleberg, Ola Stenlåås
  • Publication number: 20190353127
    Abstract: The present disclosure relates to a fuel injector for supplying fuel into a combustion chamber of an internal combustion engine. The fuel injector comprises an injector body, a nozzle, a needle, and a nozzle retainer removably arranged at the injector body to retain the nozzle against the injector body. The nozzle comprises a first channel adapted to contain fuel. The injector body comprises a second channel adapted to contain fuel. The first and second channels are fluidically connected. The needle is slidably arranged in the first and second channels. The needle comprises an upper needle section and a lower needle section. The lower needle section is removably connected to the upper needle section. The present disclosure also relates to a nozzle for a fuel injector, a lower needle section for a fuel injector, and an internal combustion engine comprising a fuel injector.
    Type: Application
    Filed: December 5, 2017
    Publication date: November 21, 2019
    Applicant: Scania CV AB
    Inventors: Raoul ILIA, Carl-Johan CEDERBERG, Andreas ANDERSSON, Kim KYLSTRÖM
  • Publication number: 20190316542
    Abstract: Provided is a method for diagnosing unintended fuelling from one or more fuel injectors of a multi cylinder internal combustion engine during engine operation. Pressurized fuel is intended to be distributed by means of said fuel injectors from said accumulator tank to the cylinders for combustion. An oxidation catalyst is arranged downstream said cylinders. The method comprises: determining the pressure in the fuel accumulator tank and whether said pressure is decreasing; and determining whether the actual amount of fuel provided by the pump unit exceeds the demanded amount of fuel. The method further comprises the steps of: determining whether the temperature associated with the oxidation catalyst is above a certain level and/or determining whether the air/fuel ratio is below a certain level and/or determining whether an amount of particulate matter is above a certain level; and confirming an unintended fuelling based on the determined conditions.
    Type: Application
    Filed: June 19, 2017
    Publication date: October 17, 2019
    Applicant: Scania CV AB
    Inventors: Kim KYLSTRÖM, Roger HÄLLEBERG, Ola STENLÅÅS
  • Publication number: 20190316554
    Abstract: The present invention relates to a fuel system for a combustion engine, the fuel system comprising a low-pressure circuit comprising at least one fuel tank, at least one low-pressure fuel pump, a first fuel filter and a second fuel filter which is arranged downstream of the first fuel pump, and a high-pressure circuit comprising a high-pressure fuel pump. The high-pressure fuel pump comprises means to suck fuel from the low-pressure circuit and in case of failure in the at least one low-pressure fuel pump, to suck fuel from the low-pressure circuit and the fuel is arranged to by-pass the at least one low-pressure fuel pump and optionally, at least one of the first or second fuel filters, via at least one by-pass pipe comprising a check valve that prevents the flow of fuel back to the fuel tank.
    Type: Application
    Filed: July 17, 2017
    Publication date: October 17, 2019
    Applicant: Scania CV AB
    Inventors: Adam BERG, Kim KYLSTRÖM, Emil KYLBERG, Patrik FOGELBERG
  • Patent number: 10436143
    Abstract: A method and a system for control of a low-pressure circuit in a fuel system of a vehicle, which circuit is arranged to provide the vehicle's engine with fuel from at least one fuel tank via a pressure change system. The system includes a determination unit to make a determination of a future working point for the engine. The determination unit bases this determination on information about a section of road ahead. The system also has a pump operating unit which operates at least one controllable fuel pump which is part of the low-pressure circuit. The pump operating unit bases this operation on the future working point.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: October 8, 2019
    Assignee: SCANIA CV AB
    Inventors: Dan Cedfors, Kim Kylström, Patrik Fogelberg, Anders Jonsson, Carina Forsberg
  • Publication number: 20190093612
    Abstract: The present invention relates to a fuel system for an internal combustion engine, and a method to increase vaporization temperature of a fuel in the fuel system, which fuel system comprises a fuel tank, a fuel pump, a fuel filter device arranged downstream of the fuel pump, a first fuel conduit through which the fuel pump is arranged to supply fuel through the fuel filter device. A control valve, which opens and/or closes at a pre-determined pressure arranged upstream of the fuel filter device and downstream of the fuel pump, and a check valve arranged upstream of the fuel pump to prevent the fuel from flowing back to the fuel tank. A pressure, which is less than the pre-determined opening pressure of the control valve, is built up in the fuel pump after the internal combustion engine is turned off, for increasing vaporization temperature for hot start of the vehicle.
    Type: Application
    Filed: February 2, 2017
    Publication date: March 28, 2019
    Applicant: Scania CV AB
    Inventors: Kim KYLSTRÖM, Tryggve NYLANDER
  • Publication number: 20190048838
    Abstract: A fuel injector for a compression ignited engine comprises an injector nozzle with a nozzle body having at least one spray hole with a hole entry from a sack on the inside of the nozzle body and a hole exit on the outside of the nozzle body. The hole entry of the spray hole has a cross-section being elliptical and larger than the cross-section of the hole exit of the spray hole. The cross-sections of the hole entry and the hole exit of the spray hole are concentric as seen in the direction of a centre axis of the spray hole intersecting said cross-section.
    Type: Application
    Filed: September 12, 2016
    Publication date: February 14, 2019
    Applicant: Scania CV AB
    Inventor: Kim KYLSTRÖM
  • Patent number: 9964089
    Abstract: A valve (4, 4?) for a fuel system for a combustion engine: A ball retainer (26) is provided with a cavity (28) to accommodate a ball (22). The ball (22) has a first seal surface (30) to cooperate with and abut sealingly against a seat (32). The ball retainer (26) has a secondary seal surface (34) to cooperate with and abut sealingly against the seat (32) when the ball (22) is not in the ball retainer (26). Also, a method for controlling a fuel system for a combustion engine.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: May 8, 2018
    Assignee: SCANIA CV AB
    Inventor: Kim Kylström
  • Patent number: 9903849
    Abstract: A method for determination of the bulk modulus of fuels in a fuel system of a combustion engine (2) with a common rail injection system (6), with a high pressure volume (16) including the high pressure side of a high pressure pump (9) and a fuel accumulator (8) with injectors (7) for injection of fuel into the cylinders of the combustion engine. The method including: first determining the volume of the high pressure volume by supplying a fuel with a known bulk modulus to the fuel system and by controlling the high pressure pump (9) so that it performs a pump stroke with the volume of the high pressure volume closed. The value of the determined volume is later used with another fuel in order to determine the latter fuel's bulk modulus.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: February 27, 2018
    Assignee: SCANIA CV AB
    Inventors: Kim Kylström, Roger Hälleberg
  • Patent number: 9863386
    Abstract: In a high pressure pump in a system for fuel injection in a combustion engine, determining whether a predetermined partial load operating condition prevails in the combustion engine, at which one single of several pump elements (10) in the high pressure pump is capable of alone delivering a fuel pressure requested in an accumulator tank (6), according to a first reference value, and to achieve a reproducible increase of the fuel pressure to a second reference value. If applicable, the high pressure pump's pump elements are controlled so that one single pump element alone delivers the fuel pressure in the accumulator tank according to the first reference value, whereupon this reference value is changed to the second reference value, and the actual development of the pressure in the accumulator tank as a function of time is determined, and compared with stored values of similar developments for the determination of information regarding the pump element's performance ability.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: January 9, 2018
    Assignee: SCANIA CV AB
    Inventor: Kim Kylström
  • Publication number: 20170226977
    Abstract: The present invention relates to a high pressure fuel pump comprising an inlet channel in connection with a first chamber, through which inlet channel fuel is led to the first chamber, a second chamber arranged in connection with the first chamber, an outlet valve arranged in connection with the second chamber and an inlet valve comprising a piston, with a first end section and a second end section. The piston is moveably arranged with the first end section in a third chamber, and the second end section is moveably arranged between the first chamber and the second chamber. A press element is arranged to act on the piston with a mechanic force, so that the piston strives to be positioned with the second end section closing the connection between the first chamber and the second chamber. The inlet valve is in a closed state and may be controlled via an electromagnetic unit.
    Type: Application
    Filed: August 27, 2015
    Publication date: August 10, 2017
    Inventor: Kim KYLSTRÖM
  • Patent number: 9518527
    Abstract: A method for function control of a high pressure pump (5) in a system for fuel injection in a combustion engine: The method is carried out during stationary operating conditions in the combustion engine, with a constantly requested reference value for the fuel pressure in an accumulator tank (6). A feeding pump (2) in a low pressure part (3) of the system is controlled so that the fuel pressure in the low pressure part at the inlet to the high pressure pump falls, and at the same time this fuel pressure is measured, as is the fuel pressure in the accumulator tank. The development of the measured fuel pressure in the accumulator tank is compared to the reference value during the pressure reduction in the low pressure part, for the generation of information about the high pressure pump's functionality.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: December 13, 2016
    Assignee: SCANIA CV AB
    Inventor: Kim Kylström
  • Publication number: 20160320363
    Abstract: A method for determination of the bulk modulus of fuels in a fuel system of a combustion engine (2) with a common rail injection system (6), with a high pressure volume (16) including the high pressure side of a high pressure pump (9) and a fuel accumulator (8) with injectors (7) for injection of fuel into the cylinders of the combustion engine. The method including: first determining the volume of the high pressure volume by supplying a fuel with a known bulk modulus to the fuel system and by controlling the high pressure pump (9) so that it performs a pump stroke with the volume of the high pressure volume closed. The value of the determined volume is later used with another fuel in order to determine the latter fuel's bulk modulus.
    Type: Application
    Filed: November 3, 2014
    Publication date: November 3, 2016
    Inventors: Kim KYLSTROM, Roger HALLEBERG
  • Patent number: 9476379
    Abstract: An injection unit (9) for injection of a first fuel (f1) and a second fuel (f2) in a combustion space. The injection unit (9) receives the first fuel (f1) from a fuel source (7) at a high pressure, and a second fuel (f2) from a second fuel source (15) at a lower pressure, an actuator (29) initiates a process of injecting at least the second fuel (f2) in the combustion space, and an injection nozzle (36) injects at least the second fuel (f2) in the combustion space. The injection unit includes a pressure boosting device (40) for increasing the pressure of the second fuel (f2) higher than the pressure in the second fuel source (15) by means of the pressure of the first fuel (f1), before the second fuel is injected.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: October 25, 2016
    Assignee: SCANIA CV AB
    Inventor: Kim Kylström
  • Publication number: 20160272131
    Abstract: A communication bus (B1, B2, Bp) in a motor vehicle (110) transfers electrical signals between the nodes (N1, N2, N3, Nn, N21, N2m, Np1, Npr) included in the motor vehicle. The communication bus comprises two unshielded signal lines (S1, S2) and a decoupling line (D), which are configured so as to divert undesired electromagnetic radiation deriving both from external systems that are not connected to the communication bus (B1, B2, Bp) and the electrical signals transferred via the unshielded signal lines (S1, S2). The decoupling line (D) is connected for alternating current to a ground potential in one and only one (N3) of the nodes (N1, N2, N3, Nn, N21, N2m, Np1, Npr) included in the communication system.
    Type: Application
    Filed: November 7, 2014
    Publication date: September 22, 2016
    Applicant: Scania CV AB
    Inventors: Kim KYLSTRÖM, Roger HÄLLEBERG
  • Publication number: 20160108879
    Abstract: In a high pressure pump in a system for fuel injection in a combustion engine, determining whether a predetermined partial load operating condition prevails in the combustion engine, at which one single of several pump elements (10) in the high pressure pump is capable of alone delivering a fuel pressure requested in an accumulator tank (6), according to a first reference value, and to achieve a reproducible increase of the fuel pressure to a second reference value. If applicable, the high pressure pump's pump elements are controlled so that one single pump element alone delivers the fuel pressure in the accumulator tank according to the first reference value, whereupon this reference value is changed to the second reference value, and the actual development of the pressure in the accumulator tank as a function of time is determined, and compared with stored values of similar developments for the determination of information regarding the pump element's performance ability.
    Type: Application
    Filed: May 22, 2014
    Publication date: April 21, 2016
    Inventor: Kim KYLSTRÖM