Patents by Inventor Howard Hans Ludwig

Howard Hans Ludwig 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: 5941919
    Abstract: In a vehicle with a first operating mode in which all vehicle wheels have substantially no lateral movement on a road surface and a second operating mode in which at least some of the vehicle wheels have lateral movement on the road surface, and with an actuator capable of affecting vehicle yaw rate, a vehicle yaw rate control method comprising the steps of: measuring an actual vehicle yaw rate; measuring vehicle steering wheel position; in the second mode of operation, determining a desired yaw rate command linearly responsive to the measured steering wheel position; wherein the actuator is controlled to minimize a difference between the measured vehicle yaw rate and the desired vehicle yaw rate.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: August 24, 1999
    Assignee: General Motors Corporation
    Inventors: Stephen Robert Pastor, Ronald Paul, Michael Douglas Rizzo, Edward John Bedner, Vivek Jaikamal, Kevin Austin O'Dea, Edmund Stanley Browalski, Howard Hans Ludwig, Scott Douglas Morrison, Hsien Heng Chen, Yuen-Kwok Chin, Youssef Ahmed Ghoneim, William Chin-Woei Lin, Mutasim Abdurrahman Salman, David Michael Sidlosky, Michael Paul Turski
  • Patent number: 5746486
    Abstract: A brake control system method according to the steps of: determining driver commanded yaw rate; measuring actual yaw rate; determining a yaw rate error; determining, in response to vehicle conditions, a yaw rate dead band wherein the yaw rate dead band varies with vehicle conditions; comparing the yaw rate error to the dead band; and if the yaw rate error exceeds the dead band, controlling the vehicle responsive to the yaw rate error, wherein yaw rate control only occurs when the yaw rate error exceeds the dead band.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: May 5, 1998
    Assignee: General Motors Corporation
    Inventors: Ronald Paul, Stephen Robert Pastor, Michael Douglas Rizzo, Duane Edward Bassett, Edward John Bedner, Douglass L. Carson, Hsien Heng Chen, Yuen-Kwok Chin, Youssef Ahmed Ghoneim, Alan James Lee, William Chin-Woei Lin, Howard Hans Ludwig
  • Patent number: 5686662
    Abstract: A vehicle yaw rate control method comprising the steps of: first estimating vehicle yaw rate responsive to a first set of criteria; second estimating vehicle yaw rate responsive to a second set of criteria, wherein the first set of criteria includes a first vehicle condition not included in the second set of criteria and wherein the second set of criteria includes a second vehicle condition not included in the first set of criteria; measuring vehicle yaw rate using a yaw rate sensor; and indicating a reverse travel condition if both of the first and second estimates have signs opposite to a sign of the measured vehicle yaw rate.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: November 11, 1997
    Assignee: General Motors Corporation
    Inventors: Steven Lee Tracht, Howard Hans Ludwig, Douglass L. Carson