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:
Dec. 24, 2024
Filed:
Jan. 31, 2020
Zf Friedrichshafen Ag, Friedrichshafen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A hydraulically actuatable shift element () includes a clutch piston (), a fast fill piston (), a fast fill valve (), a fast fill pressure chamber (), and a clutch pressure chamber (). The fast fill valve () includes a sealing body () and a control body (). Before the actuation of the shift element (), the sealing body () is in a first switching position, in which the fast fill pressure chamber () is connected to a pressurized oil source () and, after the actuation of the shift element () in a second switching position, seals off the fast fill pressure chamber () with respect to the rest of the hydraulic system. The control body () has a first pressure surface (A) and a second pressure surface (A), wherein, in the first switching position, only the first pressure surface (A) is pressurizable from the pressurized oil source (). The fast fill valve () is configured such that, in the second switching position or between the first switching position and the second switching position of the control body (), the second pressure surface (A), in addition to the first pressure surface (A), is pressurizable.