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:
Apr. 23, 2002
Filed:
Jun. 29, 2000
Carl Erik Mikael Förborgen, Tyresö, SE;
Inmotion Technologies AB, Stockholm, SE;
Abstract
A power steering system for a vehicle which has one or more steerable wheels ( ) includes a manually operable steering wheel ( ), a first angle sensing device ( ) connected to the steering wheel ( ), a servo motor ( ) connected to the steering wheel or wheels ( ), associated with the servo motor ( ), and a control unit ( ) for receiving signals from the first angle sensing device ( ) and for energizing the servo motor ( ). The first angle sensing device ( ) includes a single digital angle encoder fed with a constant supply voltage (VCC) by the control unit ( ), and generates electric pulses of a certain amplitude (&Dgr;V ) The control unit ( ) includes a malfunction detecting device connected to the angle encoder ( ), and the angle encoder ( ) includes a circuit for establishing a constant analog voltage for reducing the pulse amplitude (&Dgr;V ) normally delivered by the angle encoder ( ) to a suitable check amplitude (&Dgr;V )