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:
Aug. 26, 2014
Filed:
Sep. 28, 2007
Neil Trueman, Walsall, GB;
George Thomas Dibben, Glenfield, GB;
Neil Trueman, Walsall, GB;
George Thomas Dibben, Glenfield, GB;
TRW Limited, Midlands, GB;
Abstract
An electric power assisted steering apparatus for a vehicle, comprising: a steering mechanism, which operatively connects a steering wheel to road wheels of the vehicle; an electric motor operatively connected to the steering mechanism; a torque sensing means adapted to produce a first output signal indicative of the torque carried by a portion of the steering mechanism; a vehicle speed sensing means for producing a second output signal indicative of the speed of the vehicle; a signal processing means adapted to receive the first and second signals and to produce a torque demand signal representative of the torque to be applied to the steering mechanism by the motor; and a motor drive stage adapted to provide a drive current to the motor responsive to the torque demand signal; wherein the apparatus include at least one of the torque limiter arranged to limit the torque and the maximum rate of increase of the torque following a restart of the apparatus, the limit and rate being determined at least in part by information indicative of a state of the system prior to the restart.