The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 10, 1990
Filed:
Sep. 23, 1988
John-Cyril P Hanisko, Southfield, MI (US);
TRW Inc., Lyndhurst, OH (US);
Abstract
A method and apparatus for controlling a vehicle power assist steering system. The apparatus includes a control circuit for controlling the power assist as a function of sensed vehicle speed and applied steering torque. The control circuit includes a circuit for providing a pulse-width modulated signal having a duty cycle that varies as a function of vehicle speed. the control circuit further includes a torque signal amplifier having a gain that is controlled by the pulse-width modulated signal. A filter network averages the value of the output of the torque signal amplifier. The average value is a power assist control signal used to control the power assist.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile