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, 2025
Filed:
Jun. 27, 2023
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Clemens Moser, Mittelberg, AT;
Mario Hasel, Wangen, DE;
Alexander Haberstock, Ravensburg, DE;
Anshuman Deshpande, Friedrichshafen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method for operating a motor vehicle having a transmission including a hydraulic system with a dual-circuit pump includes driving the dual-circuit pump by both an internal combustion engine and an electric machine via a superposition gear unit that superimposes a rotational speed of the internal combustion engine and a rotational speed of the electric machine. The method further includes determining whether a subset is less than a subset threshold value when a target value of a required primary flow increases in a dual-circuit operating state to a value higher than a current primary flow actual value, with the subset being a difference between the target value and the current primary flow actual value. Additionally, the method includes increasing the second rotational speed of the electric machine when the subset is less than the subset threshold value.