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:
Sep. 09, 2003
Filed:
Jul. 16, 2002
Siemens VDO Automotive, Toulouse Cedex 1, FR;
Abstract
Method for correcting the signal ( ) of a sensor corresponding to the passage of teeth ( ) and of hollows ( ) of a target ( ) secured to an engine camshaft, characterized in that duration measurement is used to evaluate the angular values (&agr; ,&agr; ) of the alternations ( ) of the signal corresponding to the teeth and to the hollows, these angular values are compared with the mechanical angles (&ggr; ,&ggr; ) of the teeth and of the hollows, and from this a phase shift (&agr; ,&agr; ) of the rising ( ) and falling ( ) fronts of the signal with respect to the corresponding flanks ( ) of the teeth of the target is deduced. When said teeth and hollows extend over equal angular sectors, the phase shifts are calculated directly by comparing the duration measurements of two consecutive alternations ( ) of the signal.