Multi-stage automatic transmission with three planetary gearwheel assemblies

US7140997B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Peter Tiesler · Meckenbeuren, DE
• Peter Ziemer · Tettnang, DE

Key dates

• Filing date: Jul 31, 2003
• Grant date: Nov 28, 2006
• Expiry date: Jul 31, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2200/201
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A multi-stage automatic transmission comprises a drive input shaft (AN), a drive output shaft (AB), three planetary gearwheel assemblies (RS1, RS2, RS3) arranged next to one another in series and five shift control elements (A to E). A sun gearwheel (SO3) of the third planetary gearwheel assembly (RS3) can be fixed relative to a transmission housing (GG) via the first shift control element (A). The drive input shaft (AN) is connected to a sun gearwheel (SO2) of the second planetary gearwheel assembly (RS2) and can be connected via the second shift control element (B) to a sun gearwheel (SO1) of the first planetary gearwheel assembly (RS1) and via the fifth shift control element (E) to a web (ST1) of the first planetary gearwheel assembly (RS1).