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:
Jul. 17, 2012
Filed:
Nov. 10, 2008
Alexander Dreher, Sinzheim, DE;
Alexander Dreher, Sinzheim, DE;
Schaeffler Technologies AG & Co. KG, Herzogenaurach, DE;
Abstract
The invention relates to a dual clutch transmission with two friction clutches and a method for controlling it, where the two friction clutches are actuated utilizing electromechanical disengaging units. To counteract lockup of the dual clutch transmission in the event of a failure of an electric motor, the functional capability of the electric motors is monitored. If the function of an electric motor is deficient, a signal is generated in the control device that brings about in the program sequence of the transmission control system a disengagement of all of the gears that are situated in a sub-drivetrain whose friction clutch is actuated by the affected electric motor. In this way it is possible to prevent lockup of the dual clutch transmission during a malfunction of an electric motor during a state in which torque is being transmitted to the sub-drivetrain.