Automatic transmission

US7273438B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Peter Tiesler · Meckenbeuren, DE
• Gerhard Gumpoltsberger · Friedrichshafen, DE

Key dates

• Filing date: May 6, 2005
• Grant date: Sep 25, 2007
• Expiry date: Jan 10, 2026

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2200/2046
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A transmission with seven forward gears and one reverse gear comprising an input shaft, an output shaft, three planetary sets, seven rotatable shafts and six shifting elements. The input shaft is connected to the sun gear of the planetary set and can be connected to the fifth shaft, which is connected to the spider of the planetary set. The third shaft can be connected to the sixth shaft. The third shaft can be coupled to the housing and is connected to the spider of the first planetary set. The sixth shaft is connected to the internal gear of the second planetary set and the sun gear of the third planetary set and the seventh shaft is connected to the spider of the second planetary set. The fourth shaft is connected to the sun gear of the planetary set and the output shaft is connected to the internal gear of the planetary set.