Patents by Inventor Jeffrey J. Tumavitch

Jeffrey J. Tumavitch 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).

  • Rapid synchronizer touch point adjustment
    Patent number: 9423024
    Abstract: A method of adapting transmission controls to locate synchronizer touch points in an automated layshaft transmission. This method may include actuating a motor to move a shift drum along a layshaft at an essentially constant speed; measuring a feedback current as the motor moves the shift drum; detecting a first spike in feedback current adjacent to a second spike in feedback current for a gear; determining a shift drum angle for the first spike; and adjusting a transmission controller to set a synchronizer touch point at a shift drum angle adjacent to the first feedback current spike for the gear.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: August 23, 2016
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Jeffrey J. Tumavitch, Shawn A. Holland, Bradley D. Riedle, William L. Murray
  • PARK MECHANISM FOR A MOTOR VEHICLE
    Publication number: 20140209429
    Abstract: A park mechanism includes a cam pivotal between Park and not-Park ranges, including a radial outer surface formed with angularly spaced lobes, a roller urged by a spring into contact with the outer surface, a park spring urging the cam toward the Park-range, a power source for pivoting the cam, and a pawl actuated by cam movement into a Park state and a not-Park state.
    Type: Application
    Filed: January 28, 2013
    Publication date: July 31, 2014
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Jeffrey J. Tumavitch, Brian J. Deurloo, Richard R. Hathaway
  • RAPID SYNCHRONIZER TOUCH POINT ADJUSTMENT
    Publication number: 20130184945
    Abstract: A method of adapting transmission controls to locate synchronizer touch points in an automated layshaft transmission. This method may include actuating a motor to move a shift drum along a layshaft at an essentially constant speed; measuring a feedback current as the motor moves the shift drum; detecting a first spike in feedback current adjacent to a second spike in feedback current for a gear; determining a shift drum angle for the first spike; and adjusting a transmission controller to set a synchronizer touch point at a shift drum angle adjacent to the first feedback current spike for the gear.
    Type: Application
    Filed: January 12, 2012
    Publication date: July 18, 2013
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Jeffrey J. Tumavitch, Shawn A. Holland, Bradley D. Riedle, William L. Murray
  • Power-off downshift engagement dampening
    Patent number: 8308609
    Abstract: A method for controlling a power-off downshift in a powershift transmission includes disengaging the current gear, synchronizing engine speed and a speed of the target gear layshaft by increasing a torque capacity of the target gear clutch, disengaging the clutch, engaging the target gear, and reengaging the clutch.
    Type: Grant
    Filed: June 14, 2010
    Date of Patent: November 13, 2012
    Assignee: Ford Global Technologies, LLC
    Inventors: Shawn A. Holland, Ralph S. Walker, George Herr, Jeffrey J. Tumavitch, Bradley D. Riedle, Steven C. Meisner, Hong Jiang, Matthew J. Shelton
  • Power-Off Downshift Engagement Dampening
    Publication number: 20110306464
    Abstract: A method for controlling a power-off downshift in a powershift transmission includes disengaging the current gear, synchronizing engine speed and a speed of the target gear layshaft by increasing a torque capacity of the target gear clutch, disengaging the clutch, engaging the target gear, and reengaging the clutch.
    Type: Application
    Filed: June 14, 2010
    Publication date: December 15, 2011
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Shawn A. Holland, Ralph S. Walker, George Herr, Jeffrey J. Tumavitch, Bradley D. Riedle, Steven C. Meisner, Hong Jiang, Matthew J. Shelton