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:
May. 22, 2001
Filed:
Apr. 13, 1999
TRW Fahrwerksysteme GmbH & Co. KG, Dusseldorf, DE;
Abstract
The object of the present invention is to provide a method for limiting the hydraulic maximum pressure of a power-assisted steering system, which permits effective pressure limitation and thus protects the individual elements of the power-assisted steering system, i.e., a pressure limitation not far above the desired maximum operating pressure, but on the other hand does not require an overdimensioning of the individual segments of the power-assisted steering system. To solve this technical problem, the invention proposes a method for limiting the hydraulic maximum pressure of a power-assisted steering system whose hydraulic pump is driven by an electric motor characterized in that an upper limit value for the hydraulic maximum pressure is predefined, a limit value for the maximum current input is calculated therefrom, the generated current input of the electric motor is measured and, if the upper limit value is exceeded, the hydraulic flow is limited through the current input by reducing the speed of the electric motor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile