Patents by Inventor Fredrik Sjöqvist

Fredrik Sjöqvist 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: 11543028
    Abstract: A transmission for a vehicle. The transmission includes a housing and a valve block arranged in the housing, and a parking lock mechanism. The parking lock mechanism has a wheel rotationally locked to a shaft of the transmission, a pawl and a hydraulic actuator arranged for engagement of the wheel and the pawl for locking the shaft. The actuator is hydraulically connected to the valve block such that the actuator is supplied by hydraulic fluid from the valve block.
    Type: Grant
    Filed: May 20, 2021
    Date of Patent: January 3, 2023
    Assignee: NINGBO GEELY AUTOMOBILE RESEARCH & DEVELOPMENT CO.
    Inventor: Fredrik Sjöqvist
  • Patent number: 11512752
    Abstract: The present invention relates to a clutch arrangement (500) of a vehicle transmission arrangement (100), the clutch arrangement (500) being positioned within a clutch bell housing (206) of the vehicle transmission and comprising a pneumatically controlled actuator arrangement (208) connectable to a first clutch unit (202) of the vehicle transmission arrangement (100) and arranged to controllably position the first clutch unit (202) between a closed position and an opened position, a pneumatically controlled brake actuator arrangement (210) connectable to a second clutch unit (204) of the transmission arrangement and arranged to controllably position the second clutch unit (204) between a closed position and an opened position, and a valve unit (302) connected to the pneumatically controlled actuator arrangement (208) and the pneumatically controlled brake actuator arrangement (210), wherein the valve unit (302) comprises a clutch valve (308) arranged in fluid communication with the pneumatically controlled ac
    Type: Grant
    Filed: February 16, 2021
    Date of Patent: November 29, 2022
    Assignee: VOLVO TRUCK CORPORATION
    Inventors: Lars Zetterstrand, Fredrik Sjöqvist
  • Publication number: 20210285542
    Abstract: A transmission for a vehicle. The transmission includes a housing and a valve block arranged in the housing, and a parking lock mechanism. The parking lock mechanism has a wheel rotationally locked to a shaft of the transmission, a pawl and a hydraulic actuator arranged for engagement of the wheel and the pawl for locking the shaft. The actuator is hydraulically connected to the valve block such that the actuator is supplied by hydraulic fluid from the valve block.
    Type: Application
    Filed: May 20, 2021
    Publication date: September 16, 2021
    Inventor: Fredrik SJÖQVIST
  • Publication number: 20210180654
    Abstract: A transmission includes a first component and a second component which are journaled for rotation relative to each other, and a locking mechanism for rotationally locking the first component and the second component relative to each other in a predetermined mutual rotation position. The locking mechanism includes a sleeve and a dog clutch, the sleeve being rotationally locked relative to the first component and the dog clutch being rotationally locked relative to the second component, the sleeve and the dog clutch being axially displaceable relative to each other for engagement of the sleeve and the dog clutch such that the first component and the second component are rotationally locked relative to each other, the sleeve and the dog clutch being engageable only in a mutual rotation position corresponding to the predetermined mutual rotation position of the first component and the second component.
    Type: Application
    Filed: February 27, 2021
    Publication date: June 17, 2021
    Inventors: Eva BARRIENTOS BLANCO, Henrique BUDACS, Fredrik SJÖQVIST
  • Publication number: 20210164530
    Abstract: The present invention relates to a clutch arrangement (500) of a vehicle transmission arrangement (100), the clutch arrangement (500) being positioned within a clutch bell housing (206) of the vehicle transmission and comprising a pneumatically controlled actuator arrangement (208) connectable to a first clutch unit (202) of the vehicle transmission arrangement (100) and arranged to controllably position the first clutch unit (202) between a closed position and an opened position, a pneumatically controlled brake actuator arrangement (210) connectable to a second clutch unit (204) of the transmission arrangement and arranged to controllably position the second clutch unit (204) between a closed position and an opened position, and a valve unit (302) connected to the pneumatically controlled actuator arrangement (208) and the pneumatically controlled brake actuator arrangement (210), wherein the valve unit (302) comprises a clutch valve (308) arranged in fluid communication with the pneumatically controlled ac
    Type: Application
    Filed: February 16, 2021
    Publication date: June 3, 2021
    Applicant: VOLVO TRUCK CORPORATION
    Inventors: Lars ZETTERSTRAND, Fredrik SJÖQVIST
  • Patent number: 10968973
    Abstract: The present invention relates to a clutch arrangement (500) of a vehicle transmission arrangement (100), the clutch arrangement (500) being positioned within a clutch bell housing (206) of the vehicle transmission and comprising a pneumatically controlled actuator arrangement (208) connectable to a first clutch unit (202) of the vehicle transmission arrangement (100) and arranged to controllably position the first clutch unit (202) between a closed position and an opened position, a pneumatically controlled brake actuator arrangement (210) connectable to a second clutch unit (204) of the transmission arrangement and arranged to controllably position the second clutch unit (204) between a closed position and an opened position, and a valve unit (302) connected to the pneumatically controlled actuator arrangement (208) and the pneumatically controlled brake actuator arrangement (210), wherein the valve unit (302) comprises a clutch valve (308) arranged in fluid communication with the pneumatically controlled ac
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: April 6, 2021
    Assignee: VOLVO TRUCK CORPORATION
    Inventors: Lars Zetterstrand, Fredrik Sjöqvist
  • Publication number: 20190293138
    Abstract: The present invention relates to a clutch arrangement (500) of a vehicle transmission arrangement (100), the clutch arrangement (500) being positioned within a clutch bell housing (206) of the vehicle transmission and comprising a pneumatically controlled actuator arrangement (208) connectable to a first clutch unit (202) of the vehicle transmission arrangement (100) and arranged to controllably position the first clutch unit (202) between a closed position and an opened position, a pneumatically controlled brake actuator arrangement (210) connectable to a second clutch unit (204) of the transmission arrangement and arranged to controllably position the second clutch unit (204) between a closed position and an opened position, and a valve unit (302) connected to the pneumatically controlled actuator arrangement (208) and the pneumatically controlled brake actuator arrangement (210), wherein the valve unit (302) comprises a clutch valve (308) arranged in fluid communication with the pneumatically controlled ac
    Type: Application
    Filed: May 23, 2017
    Publication date: September 26, 2019
    Inventors: Lars Zetterstrand, Fredrik Sjöqvist
  • Publication number: 20140324309
    Abstract: A method and a system for calibrating an estimated clutch characteristic curve of a dual-clutch vehicle transmission are provided. The method includes mechanically interconnecting a first input shaft with a second input shaft, whereby a transmission output shaft is disengaged; controlling, according to a first alternative, a regulating parameter of a first clutch regulator such that a first friction clutch is engaged with a first torque transmission capability, that a second friction clutch (initially is disengaged, and subsequently engaged; or according to a second alternative, that the second friction clutch is initially engaged, a regulating parameter of the first clutch regulator such that the first friction clutch is engaged with a first torque transmission capability, and that the second friction clutch subsequently disengaged; calculating a torque transmission capability of the second friction clutch; and adjusting an estimated clutch characteristic curve of the second friction clutch.
    Type: Application
    Filed: December 20, 2010
    Publication date: October 30, 2014
    Applicant: VOLVO LASTVAGNAR AB
    Inventors: Fredrik Karpenman, Behrooz Razaznejad, Henrik Ryberg, Sami Aho, Fredrik Sjöqvist
  • Publication number: 20110297502
    Abstract: A vehicle clutch includes a clutch disc, a moveable pressure plate, a plurality of clutch levers, and an actuator to cause pressure plate to move by pivoting the clutch levers. Each of the clutch levers are pivotable around a first fulcrum, which is part of a clutch housing, a second fulcrum, which is part of the pressure plate, and a third fulcrum, which is part of the actuator. A pivot surface of each of the fulcrums around which the clutch levers pivot with a rolling action over the pivot surface is defined by a radius, which measures from a geometrical centre in each of the fulcrums and out to the pivot surface. A magnitude of the radius varies along the pivot surface in order to have a lever ratio of the clutch levers that varies as the clutch levers pivot.
    Type: Application
    Filed: January 26, 2010
    Publication date: December 8, 2011
    Applicant: VOLVO LASTVAGNAR AB
    Inventors: Lars-Erik Carlsson, Fredrik Sjöqvist