Multi-ratio transmission

US9109671B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Stefan Beck · Eriskirch, DE
• Timo Wehlen · Friedrichshafen, DE

Key dates

• Filing date: Jan 10, 2013
• Grant date: Aug 18, 2015
• Expiry date: Feb 4, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/62
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A multi-stage transmission with eight forward and one reverse gear including planetary gearsets, shafts, and shift elements. The sun gear of gearset (P1) couples shaft (3) and the ring gear of gearset (P4) and can couple the housing via brake (03). The drive shaft couples the carrier of gearset (P1) and can couple shaft (5) via clutch (15). Shaft (5) couples the ring and sun gears of respective gearsets (P2, P4). The ring gear of gearset (P1) couples shaft (6) and the sun gear of gearset (P2). Shaft (8) couples the carrier and sun gears of respective gearsets (P4, P3). Shaft (4) couples the carrier of gearset (P3) and can couple the housing via brake (04). Output shaft couples the ring gear of gearset (P4) and can couple, via clutch (27), shaft (7), which couples the carrier of gearset (P2). Clutch (67, 56, 57) engages to block gearset (P2).