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:
Oct. 14, 2014
Filed:
Nov. 16, 2011
Thomas Riess, Haβfurt, DE;
Christian Selinka, Poppenhausen, DE;
Stefan Pümmler, Bergrheinfeld, DE;
Günter Grau, Würzburg, DE;
Thomas Riess, Haβfurt, DE;
Christian Selinka, Poppenhausen, DE;
Stefan Pümmler, Bergrheinfeld, DE;
Günter Grau, Würzburg, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method for operating an open 3-line type hydrodynamic coupling device, in which a fluid pressure displacing a clutch piston in an engaging direction is provided in the first space area for engaging the lockup clutch, and a fluid pressure displacing the clutch piston in the disengaging direction is provided in a second space area for disengaging the lockup clutch. A fluid supply pressure for the first space area and/or a fluid supply pressure for the second space area are/is adjusted depending on at least one operating variable in the engaged state of the lockup clutch and/or in the disengaged state of the lockup clutch and/or for engaging the lockup clutch and/or for disengaging the lockup clutch.