Patent · US Active

Method and control unit for operating a hydraulic system of a transmission of a motor vehicle

US12379025B2 · kind B2 · utility

0Cited by

1References

9Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Mario Hasel · Opfingen, DE
Jakob Mayer · Kreßbronn, DE
Anshuman Deshpande · Friedrichshafen, DE

Key dates

Filing date	Jun 27, 2023
Grant date	Aug 5, 2025
Priority date	—
Expiry date	Nov 29, 2043

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2061/0037
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A method for operating a hydraulic system (1) of a transmission (2) of a motor vehicle i includes ascertaining an actual volumetric flow of oil that is deliverable into a primary hydraulic circuit (10) by at least one hydraulic pump (3), ascertaining a target volumetric flow of oil that is required by the primary hydraulic circuit (10), and ascertaining an excess volumetric flow of oil depending on the actual volumetric flow of oil and the target volumetric flow of oil. The excess volumetric flow of oil is distributed to shift elements of the transmission (2) to be actuated, depending on the hydraulic capacity of these shift elements, and is taken into account when limiting the pressure actuation of the shift elements of the transmission (2) to be actuated.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.