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:
Feb. 27, 2024
Filed:
Jun. 07, 2023
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Anton Fritzer, Markdorf, DE;
Thilo Schmidt, Meckenbeuren, DE;
Andreas Schmidt, Ravensburg, DE;
Valentine Vincent, Friedrichshafen, DE;
Christoph Köhler, Bodolz, DE;
Jonas Knör, Erbach, DE;
Michael Miller, Leutkirch, DE;
Mario Hasel, Wangen, DE;
Jakob Mayer, Kressbronn, DE;
Christian Hunger, Eriskirch, DE;
Fabian Schöniger, Tettnang, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A vehicle transmission includes a hydraulic circuit and a control unit. The control unit is configured to: obtain () a target pressure specification; convert () the target pressure specification into a target volume flow rate; determine () a valve volume flow rate as a function of the target volume flow rate and as a function of parameters that represent system properties of the hydraulic circuit; determine () a pressure drop at a valve due to flow forces as a function of the valve volume flow rate; determine () a compensated valve output pressure as a function of the valve volume flow rate and the pressure drop; determine () the electric control current as a function of the compensated valve output pressure; and activate a valve with the electric control current.