Patents by Inventor Ashraf A. Zeid

Ashraf A. Zeid 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).

  • Electric power assist torque check
    Patent number: 6845309
    Abstract: A power steering system includes at least one motor to assist the operator of a vehicle in turning the wheels and steering the vehicle and at least one computer or microprocessor controller. One of the processors adjusts the motor assist torque to reduce the driver effort based on specified requirements defined by boost curves. A second microprocessor controller uses an algorithm to calculate the output of the power steering motor, and compare the relationship between the driver torque and the power assist torque. If the relationship between the two is out of specified bounds, then the power steering assist is deemed inappropriate and the power system may go to a power-off state to assure that the motor does not generate an undesirable torque that has not been requested by the driver.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: January 18, 2005
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Darrel A. Recker, Dale C. Killins, Ashraf A. Zeid, Robert A. Stopper, Jr.
  • Electric power assist torque check
    Publication number: 20030144780
    Abstract: A power steering system includes at least one motor to assist the operator of a vehicle in turning the wheels and steering the vehicle and at least one computer or microprocessor controller. One of the processors adjusts the motor assist torque to reduce the driver effort based on specified requirements defined by boost curves. A second microprocessor controller uses an algorithm to calculate the output of the power steering motor, and compare the relationship between the driver torque and the power assist torque. If the relationship between the two is out of specified bounds, then the power steering assist is deemed inappropriate and the power system may go to a power-off state to assure that the motor does not generate an undesirable torque that has not been requested by the driver.
    Type: Application
    Filed: January 30, 2002
    Publication date: July 31, 2003
    Applicant: Visteon Global Technologies, Inc.
    Inventors: Darrel A. Recker, Dale C. Killins, Ashraf A. Zeid, Robert A. Stopper