Multi-stage automatic transmission with three planetary gearwheel assemblies

US6997845B2 · 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: Feb 14, 2006
• Expiry date: Jul 31, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2200/2043
• 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) by means of 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/or via the fifth shift control element (E) to a web (ST1) of the first planetary gearwheel assembly (RS1). Alternatively, the sun gearwheel (SO1) of the first planetary gearwheel assembly (RS1) can be fixed via the third shift control element (C) and/or the web (ST1) of the first planetary gearwheel assembly (RS1) via the fourth shift control element (D) relative to the transmission housing (GG). The drive output shaft (AB) is connected to an annular gearwheel (HO1) of the first planetary gearwheel assembly (RS1) and to one of the webs…