Patents by Inventor Mary M. Whitley

Mary M. Whitley 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).

  • Method and apparatus for ratio control for a continuously variable transmission
    Patent number: 10316968
    Abstract: An apparatus for ratio control of a continuously variable transmission includes a driver commanded ratio unit outputting a signal defining a commanded ratio. A clamp control portion is in communication with the driver commanded ratio unit. The clamp control portion includes: a ratio limits and override ring selecting a ratio matching the commanded ratio from an executable functions having stored ratio code data; a screening monitor continuously receiving output from the executable functions and using an input from a vehicle speed signal to compute minimum and maximum ratio limits for the ratio selected by the ratio limits and override ring; and a ratio control execution ring in communication with the screening monitor. The ratio control execution ring calculates a range of pressures allowed for operation of both primary and secondary pulleys of the continuously variable transmission.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: June 11, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Ronald F. Lochocki, Christopher J. Weingartz, Greg J. Perantoni, Stuart W. Parker, Paul G. Otanez, Bret M. Olson, Mary M. Whitley, Nathan A. Schmidt
  • METHOD AND APPARATUS FOR RATIO CONTROL FOR A CONTINUOUSLY VARIABLE TRANSMISSION
    Publication number: 20180335138
    Abstract: An apparatus for ratio control of a continuously variable transmission includes a driver commanded ratio unit outputting a signal defining a commanded ratio. A clamp control portion is in communication with the driver commanded ratio unit. The clamp control portion includes: a ratio limits and override ring selecting a ratio matching the commanded ratio from an executable functions having stored ratio code data; a screening monitor continuously receiving output from the executable functions and using an input from a vehicle speed signal to compute minimum and maximum ratio limits for the ratio selected by the ratio limits and override ring; and a ratio control execution ring in communication with the screening monitor. The ratio control execution ring calculates a range of pressures allowed for operation of both primary and secondary pulleys of the continuously variable transmission.
    Type: Application
    Filed: May 16, 2017
    Publication date: November 22, 2018
    Inventors: Ronald F. Lochocki, Christopher J. Weingartz, Greg J. Perantoni, Stuart W. Parker, Paul G. Otanez, Bret M. Olson, Mary M. Whitley, Nathan A. Schmidt