Patents by Inventor Jonathan Darab

Jonathan Darab 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).

  • Temperature compensation method for an air suspension after engine shut-off
    Patent number: 9050871
    Abstract: A method for temperature compensating an air spring of an air spring suspension of a motor vehicle after engine shut-off. A desired trim height is obtained. At engine shut-off, the ambient temperature is measured and the temperature of air in the air spring determined. After a wait time (for loading/unloading), a start trim height is measured. A predicted trim height is determined for when the air in the air spring is at the ambient temperature. Finally, the volume of the air in the air spring is selectively adjusted so that when the air in the air spring arrives at the ambient temperature, the trim height will be about the desired trim height.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: June 9, 2015
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Yunjun Li, John X. Cui, Steven A. Opiteck, Jonathan Darab, Nikolai K. Moshchuk
  • Tire and method of selectively altering or controlling properties or characteristics thereof under varying conditions
    Patent number: 8899104
    Abstract: One exemplary embodiment includes a method comprising providing a tire having a component constructed and arranged to cause at least one portion of the tire to have a first stiffness or resistance to force exerted thereon under a first condition and a second stiffness or resistance to force exerted thereon under a second condition and selectively causing the first or second condition to occur.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: December 2, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: John C. Ulicny, William R. Rodgers, Tadeusz B. Pietrzyk, Keith S. Snavely, Mark A. Golden, Jonathan Darab
  • Methods and systems for testing tires of vehicles to quantify transient tire force and moment responses
    Patent number: 8006550
    Abstract: A method for testing a tire of a vehicle that includes the steps of creating a first condition comprising a first slip angle of the tire, obtaining a first set of data regarding performance of the tire under the first condition, creating a second condition comprising either a second slip angle or lateral displacement of the tire, obtaining a second set of data regarding performance of the tire under the second condition, and determining the transient response of the lateral force and aligning moment of the tire, using the first set of data and the second set of data.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: August 30, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Kenneth L. Oblizajek, William A. Cobb, John D. Sopoci, Jonathan Darab, David L. Howland
  • METHODS AND SYSTEMS FOR TESTING TIRES OF VEHICLES TO QUANTIFY TRANSIENT TIRE FORCE AND MOMENT RESPONSES
    Publication number: 20100257925
    Abstract: A method for testing a tire of a vehicle that includes the steps of creating a first condition comprising a first slip angle of the tire, obtaining a first set of data regarding performance of the tire under the first condition, creating a second condition comprising either a second slip angle or lateral displacement of the tire, obtaining a second set of data regarding performance of the tire under the second condition, and determining the transient response of the lateral force and aligning moment of the tire, using the first set of data and the second set of data.
    Type: Application
    Filed: April 13, 2009
    Publication date: October 14, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Kenneth L. Oblizajek, William A. Cobb, John D. Sopoci, Jonathan Darab, David L. Howland
  • TIRE AND METHOD OF SELECTIVELY ALTERING OR CONTROLLING PROPERTIES OR CHARACTERISTICS THEREOF UNDER VARYING CONDITIONS
    Publication number: 20100077848
    Abstract: One exemplary embodiment includes a method comprising providing a tire having a component constructed and arranged to cause at least one portion of the tire to have a first stiffness or resistance to force exerted thereon under a first condition and a second stiffness or resistance to force exerted thereon under a second condition and selectively causing the first or second condition to occur.
    Type: Application
    Filed: August 26, 2009
    Publication date: April 1, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: John C. Ulicny, William R. Rodgers, Tadeusz B. Pietrzyk, Keith S. Snavely, Mark A. Golden, Jonathan Darab