Multi-speed transmission

US7575533B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventor

• Gerhard Gumpoltsberger · Friedrichshafen, DE

Key dates

• Filing date: Feb 9, 2007
• Grant date: Aug 18, 2009
• Expiry date: Sep 9, 2027

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2200/2097
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A multi-speed transmission with nine forward gears and one reverse gear, four planetary gear sets, seven shafts and six shifting elements. The input shaft is coupled to gear sets (P2, P3); shaft (3) is coupled to the carrier of gear set (P2) and the ring of gear set (P1) and is coupleable to the housing (G); shaft (4) is coupled to the ring of gear set (P3), the carrier of gear set (P4) and is coupleable to the housing; shaft (5) couples with gear set (P4) and the ring of gear set (P2) couples the housing (G), and via clutch (57) to shaft (7), which is coupled to the carrier of gear set (P1); shaft (6) is coupled to the carrier of gear set (P3) and coupleable via clutch (26) to output shaft which couples the ring of gear set (P4); the sun of gear set (P1) couples the housing.