Patent · US Active

Multi-speed transmission

US7699736B2 · kind B2 · utility

18Cited by

10References

10Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Gabor Diosi · Friedrichshafen, DE
Josef Haupt · Tettnang, DE
Peter Ziemer · Tettnang, DE
Pedro Casals · Tettnang, DE
Martin Brehmer · Tettnang, DE

Key dates

Filing date	Jul 6, 2007
Grant date	Apr 20, 2010
Priority date	—
Expiry date	Jun 30, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S903/911
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A multi-speed automatic planetary transmission for a motor vehicle having an input shaft (AN), an output shaft (AB), four planetary gearsets (RS1, RS2, RS3, RS4), at least eight rotatable shafts (1, 2, 3, 4, 5, 6, 7, 8), and five shifting elements (A, B, C, D, E), the selective engagement of which produces different transmission ratios between the input shaft (AN) and the output shaft (AB), such that eight forward gears and at least one reverse gear are possible. Further, it is possible to connect an electric machine (12) as generator and/or drive, to the fifth shaft (5) by means a drive connection.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.