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. 31, 2019
Filed:
Dec. 13, 2018
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Christoph Rüchardt, Bodolz, DE;
Thomas Jäger, Meckenbeuren, DE;
ZF FRIEDRICHSHAFEN AG, Friedrichshafen, DE;
Abstract
A method for controlling a pneumatic actuator () of a transmission having at least one sealing element (), arranged between two elements () of the clutch actuator () that move relative to one another, and within a specifiable operating temperature range in which leakproofness of the clutch actuator () is ensured. The clutch actuator () is acted upon with compressed air from an air supply system for actuating a shifting and/or starting clutch arranged between a drive aggregate and a transmission. In order to warm up the clutch actuator (), if a temperature of the clutch actuator () is lower then a glass transition temperature of the at least one sealing element (), the drive aggregate is operated at a higher rotational speed compared to the idling speed of the drive aggregate.