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:
May. 06, 2008
Filed:
Mar. 31, 2005
Reinhard Berger, Bühl, DE;
Gunter Hirt, Puschendorf, DE;
Alexander Schweizer, Walzbachtal-Jöhlingen, DE;
Boris Serebrennikov, Bühl-Kappelwindeck, DE;
Lidvar Budal, Kongsberg, NO;
Brad Shellhammer, Bühl, DE;
Jeremy Whitmer, Bühl, DE;
Dietmar Lang, Höheischweiler, DE;
Reinhard Berger, Bühl, DE;
Gunter Hirt, Puschendorf, DE;
Alexander Schweizer, Walzbachtal-Jöhlingen, DE;
Boris Serebrennikov, Bühl-Kappelwindeck, DE;
Lidvar Budal, Kongsberg, NO;
Brad Shellhammer, Bühl, DE;
Jeremy Whitmer, Bühl, DE;
Dietmar Lang, Höheischweiler, DE;
Luk Lamellen und Kupplungsbau Beteiligungs KG, Buehl, DE;
Abstract
A method for controlling gear-shifting processes of a powershift gearbox which can be coupled to a drive motor and has gear steps including two friction clutches and a plurality of clutches, and at least one gearbox actuator for actuating the gear steps. The method includes the following steps: the torque of the drive motor is received by the new friction clutch associated with the new gear step to be engaged; before the disengagement of the old gear step and before or during the torque reception, a pre-determined pre-tensioning force is applied to the clutch of the old gear step by the gearbox actuator; and the old gear step is disengaged when the motor torque and the clutch torque are balanced.