Planetary automatic transmission

US10759265B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Peter Ziemer · Tettnang, DE
• Kai Bornträger · Tettnang, DE
• Christoph Margraf · Markdorf, DE
• Stefan Brom · Friedrichshafen, DE
• Andreas Beisswenger · Friedrichshafen, DE
• Michael Trübenbach · Friedrichshafen, DE
• Johannes Glückler · Friedrichshafen, DE

Key dates

• Filing date: Nov 16, 2017
• Grant date: Sep 1, 2020
• Expiry date: Nov 16, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/62
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A transmission having five planetary gearsets and seven shift elements for achieving various ratios between drive and output shafts. A forward gearset has three shafts. Two intermediate gearsets have four shafts. Two main gearsets have at least four shafts. Depending on the shift states of the second and third shift elements, the forward gearset can generate two rotational speeds at the output side, which transfer from a forward gearset shaft to an intermediate gearset shaft. Depending on the shift states of the first to fifth shift elements, the intermediate gearset can generate eight rotational speeds at the output side, which pass from another intermediate gearset shaft to a main gearset shaft. Depending on the shift states of the seven shift elements, the main gearset can generate up to fourteen forward and two reverse gears at the output side, which are transferred by another main gearset shaft to the output shaft.