Patents by Inventor Jon K. Logan

Jon K. Logan 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: 9630601
    Abstract: A method that compensates for fluid pressure variations in a vehicle brake system so that the fluid pressure, brake torque and/or brake force at the wheel more accurately reflects that requested by the driver. In an exemplary embodiment, the method determines the braking intent of the driver, determines a current stage of the braking event (e.g., an apply stage, release stage, etc.), uses the braking event stage and the driver braking intent to select a pressure compensation, and uses the pressure compensation to generate compensated brake command signals for operating the vehicle brake system. This method is well suited for use with brake-by-wire systems, such as an electrohydraulic braking (EHB) system.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: April 25, 2017
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Jon K. Logan, Patrick J. Monsere, Margaret C. Richards, Jonathan King, Danny Y. Mui
  • Patent number: 9527484
    Abstract: Methods and systems for controlling regenerative braking in a vehicle having a regenerative braking system are provided. Values of one or more dynamic variables are obtained during operation of the vehicle. A maximum regenerative braking torque is calculated using the dynamic variable values. Regenerative braking torque is provided up to the maximum regenerative braking torque.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: December 27, 2016
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Monika A. Minarcin, Jon K. Logan, Eric M. Rask
  • Patent number: 8612074
    Abstract: Methods and systems for modulating regenerative braking in a vehicle having a regenerative braking system and an energy storage system are provided. A value is obtained for a variable pertaining to a condition that affects energy absorption of the energy storage system. A regenerative braking torque capacity for the regenerative braking system is determined using the value. Regenerative braking is controlled via the regenerative braking system based at least in part on the regenerative braking torque capacity.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: December 17, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Monika A. Minarcin, Eric M. Rask, Jon K. Logan
  • Patent number: 8326509
    Abstract: A method that compensates for temperature-related effects in a vehicle brake system. According to one embodiment, the method determines the temperature of a brake pad, calculates a temperature-based modifier, and then uses the temperature-based modifier to adjust one or more brake command signals provided to the vehicle brake system so that they are compensated for temperature-related changes in the coefficient of friction (?) of the brake pad and rotor. The method may be used with brake-by-wire systems such as electrohydraulic braking (EHB) systems and electromechanical braking (EMB) systems.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: December 4, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Jon K. Logan, Patrick J. Monsere, Danny Y. Mui, Margaret C. Richards
  • Patent number: 8204664
    Abstract: A vehicle includes a friction braking system and a powertrain system including a torque machine operative to react tractive torque input from a wheel of the vehicle. A method for controlling braking in a vehicle includes monitoring operation of the powertrain system, determining a driver intended total brake torque, determining a regenerative braking capacity based upon the operation of the powertrain system, determining a regenerative braking request based upon a time-rate change in the regenerative braking capacity, and determining a motor torque command for the torque machine based upon the regenerative braking request.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: June 19, 2012
    Assignees: GM Global Technology Operations LLC, Daimler AG, Chrysler Group LLC, Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Monika A Minarcin, Jon K. Logan, Jian M Wang, Eric M. Rask
  • Patent number: 8180545
    Abstract: A method for controlling braking in a vehicle having a brake pedal includes the steps of obtaining a first measure of braking intent based on movement of the brake pedal, obtaining a second measure of braking intent based on a force applied to the brake pedal, controlling the braking based on the first measure provided that a transition parameter is less than a first predetermined value, controlling the braking based on the second measure provided that the transition parameter is greater than a second predetermined value, and controlling the braking based on the first measure and the second measure provided that the transition parameter is greater than the first predetermined value and less than the second predetermined value.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: May 15, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Patrick J. Monsere, Jon K. Logan, Danny Y. Mui, Margaret C. Richards, Kevin S. Kidston
  • Patent number: 8135526
    Abstract: A vehicle includes a powertrain system and a friction braking system communicating tractive torque with a driveline, the powertrain system including a torque machine, and an energy storage device connected to the torque machine, said torque machine communicating tractive torque with the driveline. A method for controlling regenerative braking and friction braking includes monitoring a vehicle operating point, determining a braking torque request, determining a regenerative braking motor torque ratio based upon the vehicle operating point wherein the regenerative braking motor torque ratio is non-linearly dependent on the vehicle operating point, and actuating the friction brake based upon the regenerative braking motor torque ratio and the braking torque request.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: March 13, 2012
    Assignees: GM Global Technology Operations LLC, Daimler AG, Chrysler LLC, Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Monika A Minarcin, Jon K. Logan, Jian M Wang, Eric M. Rask
  • Publication number: 20110276243
    Abstract: Methods and systems for modulating regenerative braking in a vehicle having a regenerative braking system and an energy storage system are provided. A value is obtained for a variable pertaining to a condition that affects energy absorption of the energy storage system. A regenerative braking torque capacity for the regenerative braking system is determined using the value. Regenerative braking is controlled via the regenerative braking system based at least in part on the regenerative braking torque capacity.
    Type: Application
    Filed: May 7, 2010
    Publication date: November 10, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Monika A. Minarcin, Eric M. Rask, Jon K. Logan
  • Publication number: 20110251770
    Abstract: Methods and systems for controlling regenerative braking in a vehicle having a regenerative braking system are provided. Values of one or more dynamic variables are obtained during operation of the vehicle. A maximum regenerative braking torque is calculated using the dynamic variable values. Regenerative braking torque is provided up to the maximum regenerative braking torque.
    Type: Application
    Filed: April 8, 2010
    Publication date: October 13, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: MONIKA A. MINARCIN, JON K. LOGAN, ERIC M. RASK
  • Patent number: 7909730
    Abstract: A vehicle and a method of operation. The method of operating the vehicle may include a method of controlling a creep torque in a vehicle having a powertrain configured to provide variable creep torque. The method may comprise the steps of: detecting a vehicle creep torque condition, determining a brake torque, and adjusting a creep torque applied by the powertrain based on the brake torque.
    Type: Grant
    Filed: November 2, 2007
    Date of Patent: March 22, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Jonathan R. Schwarz, Kevin S. Kidston, Jon K. Logan
  • Publication number: 20110049974
    Abstract: A method for controlling braking of a vehicle having a first axle and a second axle includes the steps of obtaining a deceleration value pertaining to an input from a driver of the vehicle, braking the first axle with a first pressure, braking the second axle with a second pressure that is substantially equal to the first pressure if the deceleration value has not exceeded a predetermined threshold, and braking the second axle with a third pressure that is greater than the first pressure if the deceleration value has exceeded the predetermined threshold.
    Type: Application
    Filed: August 31, 2009
    Publication date: March 3, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: DANNY Y. MUI, PATRICK J. MONSERE, JON K. LOGAN, MARGARET C. RICHARDS, ERIC E. KRUEGER, KEVIN S. KIDSTON, MATTHEW M. KARABA
  • Publication number: 20100280724
    Abstract: A method for controlling braking in a vehicle having a brake pedal includes the steps of obtaining a first measure of braking intent based on movement of the brake pedal, obtaining a second measure of braking intent based on a force applied to the brake pedal, controlling the braking based on the first measure provided that a transition parameter is less than a first predetermined value, controlling the braking based on the second measure provided that the transition parameter is greater than a second predetermined value, and controlling the braking based on the first measure and the second measure provided that the transition parameter is greater than the first predetermined value and less than the second predetermined value.
    Type: Application
    Filed: April 29, 2009
    Publication date: November 4, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: PATRICK J. MONSERE, JON K. LOGAN, DANNY Y. MUI, MARGARET C. RICHARDS, KEVIN S. KIDSTON
  • Publication number: 20100256885
    Abstract: A method that compensates for fluid pressure variations in a vehicle brake system so that the fluid pressure, brake torque and/or brake force at the wheel more accurately reflects that requested by the driver. In an exemplary embodiment, the method determines the braking intent of the driver, determines a current stage of the braking event (e.g., an apply stage, release stage, etc.), uses the braking event stage and the driver braking intent to select a pressure compensation, and uses the pressure compensation to generate compensated brake command signals for operating the vehicle brake system. This method is well suited for use with brake-by-wire systems, such as an electrohydraulic braking (EHB) system.
    Type: Application
    Filed: April 6, 2009
    Publication date: October 7, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Jon K. Logan, Patrick J. Monsere, Margaret C. Richards, Jonathan King, Danny Y. Mui
  • Publication number: 20100235065
    Abstract: A method that compensates for temperature-related effects in a vehicle brake system. According to one embodiment, the method determines the temperature of a brake pad, calculates a temperature-based modifier, and then uses the temperature-based modifier to adjust one or more brake command signals provided to the vehicle brake system so that they are compensated for temperature-related changes in the coefficient of friction (?) of the brake pad and rotor. The method may be used with brake-by-wire systems such as electrohydraulic braking (EHB) systems and electromechanical braking (EMB) systems.
    Type: Application
    Filed: March 13, 2009
    Publication date: September 16, 2010
    Applicant: GM Global Technology Operations, Inc.
    Inventors: Jon K. Logan, Patrick J. Monsere, Danny Y. Mui, Margaret C. Richards
  • Publication number: 20090114468
    Abstract: A vehicle and a method of operation is disclosed. The method of operating the vehicle may include a method of controlling a creep torque in a vehicle having a powertrain configured to provide variable creep torque. The method may comprise the steps of: detecting a vehicle creep torque condition, determining a brake torque, and adjusting a creep torque applied by the powertrain based on the brake torque.
    Type: Application
    Filed: November 2, 2007
    Publication date: May 7, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Jonathan R. Schwarz, Kevin S. Kidston, Jon K. Logan
  • Publication number: 20090118888
    Abstract: A vehicle includes a friction braking system and a powertrain system including a torque machine operative to react tractive torque input from a wheel of the vehicle. A method for controlling braking in a vehicle includes monitoring operation of the powertrain system, determining a driver intended total brake torque, determining a regenerative braking capacity based upon the operation of the powertrain system, determining a regenerative braking request based upon a time-rate change in the regenerative braking capacity, and determining a motor torque command for the torque machine based upon the regenerative braking request.
    Type: Application
    Filed: October 29, 2008
    Publication date: May 7, 2009
    Applicants: GM GLOBAL TECHNOLOGY OPERATIONS, INC., Daimler AG, Chrysler LLC, Bayerishe Motoren Werke Aktiengesellschaft
    Inventors: Monika A. Minarcin, Jon K. Logan, Jian M. Wang, Eric M. Rask
  • Publication number: 20090118887
    Abstract: A vehicle includes a powertrain system and a friction braking system communicating tractive torque with a driveline, the powertrain system including a torque machine, and an energy storage device connected to the torque machine, said torque machine communicating tractive torque with the driveline. A method for controlling regenerative braking and friction braking includes monitoring a vehicle operating point, determining a braking torque request, determining a regenerative braking motor torque ratio based upon the vehicle operating point wherein the regenerative braking motor torque ratio is non-linearly dependent on the vehicle operating point, and actuating the friction brake based upon the regenerative braking motor torque ratio and the braking torque request.
    Type: Application
    Filed: October 29, 2008
    Publication date: May 7, 2009
    Applicants: GM GLOBAL TECHNOLOGY OPERATIONS, INC., Daimler AG, Chrysler LLC, Bayerishe Motoren Werke Aktiengesellschaft
    Inventors: Monika A. Minarcin, Jon K. Logan, Jian M. Wang, Eric M. Rask