Method for controlling an automated transmission

US9039569B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Mario Steinborn · Friedrichshafen, DE
• Jochen Breuer · Tettnang, DE
• Christoph Ruechardt · Bodolz, DE
• Thomas Jaeger · Meckenbeuren, DE
• Roland Mair · Tettnang, DE
• Melchor Moro-Oliveros · Friedrichshafen, DE

Key dates

• Filing date: Mar 2, 2012
• Grant date: May 26, 2015
• Expiry date: May 12, 2032

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2306/48
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A method of controlling an automated transmission for motor vehicles with one or several pressure activated positioning cylinders (6, 8, 20), via the assigned shift valves (10, 12), at least one main cut-off valve (4) which is positioned prior to the shift valves, and a control device for controlling the shift and main cut-off valves. The pressure requests, for the shifting, are determined and the respective main cut-off valves are triggered depending on the determined pressure requests. To enable a variable match of the supply pressure during transmission shifts, respective optimized pressures or pressure patterns are determined for certain shift scenarios which, for instance, consider a mass to be synchronized, the existence of a tooth-on-tooth position, or the like. Through this method, for instance, the load on shift elements, the shift timing, and the shift noise can be positively influenced.