Load-shiftable parallel shift transmission and double clutch transmission

US8578801B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Gerhard Gumpoltsberger · Friedrichshafen, DE
• Matthias Reisch · Ravensburg, DE
• Ralf Dreibholz · Meckenbeuren, DE
• Mark Mohr · Tettnang, DE

Key dates

• Filing date: Oct 13, 2008
• Grant date: Nov 12, 2013
• Expiry date: Sep 24, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19233
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A power shift parallel shift transmission with parallel torque transmission branches, the input sides of which have an intermediate element which can be connected by an associated power shift element to a common input element, and the output sides of which can be connected by drive output elements with a common output element and can be connected to the appropriate intermediate element by a transmission ratio step that is engaged by an associated clutch. The transmission ratio steps are sequentially distributed in alternation in the order of their transmission ratios across the intermediate elements and in groups of adjacent transmission ratios across the drive output elements. To simply increase the number of gear steps in a space-saving manner, at least one of the drive output elements is in driving connection with the common output element via at least two alternatively shiftable output transmission ratio steps that have different transmission ratios.