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:
Jan. 30, 2007
Filed:
Jun. 25, 2004
Daniel Laurent, Marly, CH;
Pierre Varenne, Neyruz, CH;
Pierre Alain Magne, Saint Aubin, CH;
Conception et Developpment Michelin S.A., Ch-Givisiez, CH;
Abstract
A vehicle has at least two driving wheels, each driven by an electric motor M via a gear change mechanism having at least two reduction gears. A sensor senses the rotation speed of the driving wheels. The gear change on the two driving wheels is carried out in an initial phase by: (a) releasing the current gear on a driving wheel referred to as the 'operated' wheel, and stopping it in the neutral position, (b) changing the revolution speed of the motor so as to synchronize it as a function of the reduction of the gear to be engaged on the operated wheel, using as an estimate of the speed to-be-reached a speed information item obtained from another driving wheel, referred to as the 'sensor' wheel, and (c) engaging the intended gear on the “operated” wheel. Then, in a successive phase, the gear on the other driving wheel is changed in the same manner by reversing the roles of the sensor wheel and the operated wheel.