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:
Mar. 13, 2007
Filed:
Apr. 06, 2005
Christophe Baldi, Paris, FR;
Daniel Lalu, Cesson, FR;
Christophe Baldi, Paris, FR;
Daniel Lalu, Cesson, FR;
Peugeot Citroen Automobiles SA, Velizy-Villacoublay, FR;
Abstract
A sensor of the position of a target is secured to an electromagnetic or electromechanical valve actuator of an internal combustion engine. The target is driven by a reciprocating translatory motion (f, f) in synchronism with that of the valve. The sensor uses an eddy current transducer, including two secondary coils connected in series opposition and a primary coil fed by a radio frequency current. The output signal of the transducer is sent to a phase locked loop synchronous detector. The coils are engraved or printed on a flexible film. The transducer is arranged in an external tube made of aluminum and includes an internal wall made of insulating material.