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. 30, 2004
Filed:
Apr. 30, 2002
Pietro Ferrero, Rhode-St-Genese, BE;
Ferrero S.p.A., , IT;
Abstract
A system for controlling a variable-ratio transmission is mounted on an apparatus ( ) and associated with an actuator ( ) for changing the transmission ratio, as well as operating means ( ) for applying an input driving force to the transmission with a periodic action of given frequency. The system comprises first sensor means ( ) which are sensitive to the driving force and can generate a respective first signal, second sensor means ( ) which are sensitive to the spreed of operation of the apparatus ( ) and can generate a respective second signal, as well as a control device ( ) which is sensitive to the first and second signals and can control the actuator ( ) in dependence on the first and second signals. The control device ( ) is configured to determine, from the first and second signals, a reference signal indicative or a reference value of the frequency (CR). This reference signal is compared with a third signal ( ) indicative of the given frequency so as to identify a corresponding deviation signal (e). The control device ( ) acts on the actuator ( ) in order to change the transmission ratio so as to minimize the deviation signal (e).