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. 18, 2012
Filed:
Nov. 02, 2009
Markus Terwart, Thundorf, DE;
Mario Bühner, Gerolzhofen, DE;
Karl Locher, Prongstetten-Tigerfeld, DE;
Martin-joachim Bader, Mochenwangen, DE;
Dietmar Zuber, Rödental, DE;
Olaf Moseler, Werneck, DE;
Markus Terwart, Thundorf, DE;
Mario Bühner, Gerolzhofen, DE;
Karl Locher, Prongstetten-Tigerfeld, DE;
Martin-Joachim Bader, Mochenwangen, DE;
Dietmar Zuber, Rödental, DE;
Olaf Moseler, Werneck, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method for clutch characteristic curve adaptation of an automatic dual-clutch transmission which comprises two sub-gearboxes each with an input shaft connected, via a friction clutch, to the drive shaft of a motor and several gears that are shifted via a friction-synchronized gear clutch. A value of the current touch point of the friction clutch can be determined with the motor running and the gears disengaged in a load-free sub-gearbox. The method includes the steps of starting synchronization of a gear clutch with a defined force of a regulator. Waiting until the gear clutch is synchronized. Engaging the friction clutch of the until the gear clutch is synchronizes. Determination the current touch point from the current synchronous torque of the gear clutch and the current regulating parameter of the associated clutch regulator. Then, adapting the clutch characteristic curve of the friction clutch in view of the current touch point.