Multi-stage transmission

US8858387B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Josef Haupt · Tettnang, DE
• Martin Brehmer · Tettnang, DE
• Gabor Diosi · Friedrichshafen, DE

Key dates

• Filing date: Feb 26, 2010
• Grant date: Oct 14, 2014
• Expiry date: Mar 31, 2031

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 nine forward and one reverse gear comprises planetary gearsets, shafts and shift elements. A sun gear of a first gearset (P1) is connectable to a housing via a first brake (03) and couples the sun gear of the second gearset (P2). A carrier of the first gearset (P1) couples the ring gear of the fourth gearset (P4). A ring gear of first gearset (P1) is connectable to the housing by a second brake (04). The carrier of the second gearset (P2) couples the input which is connectable by clutch (15) to the fifth shaft (5). The fifth shaft (5) respectively couples the sun and ring gears of the fourth and third gearsets (P4, P3) and is connectable to a seventh shaft (7) by clutch (57). The seventh shaft (7) respectively couples the sun and ring gears of the third and the second gearsets (P3, P2). Output shaft couples the carrier of the fourth gearset (P4) and, via clutch (28), the eight shaft (8) which is connected to the carrier of the third gearset (P3), and clutch (18) couples the eight shaft (8) to the input.