Patent · US Active

Power-split continuously variable transmission apparatus having a summing planetary transmission

US9810300B2 · kind B2 · utility

1Cited by

7References

17Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Viktor Warth · Friedrichshafen, DE
Matthias Reisch · Ravensburg, DE
Bernhard Sich · Friedrichshafen, DE

Key dates

Filing date	Oct 14, 2014
Grant date	Nov 7, 2017
Priority date	—
Expiry date	Oct 14, 2034

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2037/0893
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A power-split, continuously variable transmission includes a summing planetary transmission, at least one additional planetary gear set and a variator, which are in operative connection with each other a plurality of shafts, the shafts of the plurality of shafts are couplable to each other with a plurality of shift elements in order to provide at least three transmission ratio ranges. The variator is a mechanical friction wheel variator with at least three shafts. The summing planetary transmission, the at least one additional planetary gear and the variator are arranged coaxial to one another. In one of the transmission ratio ranges of the at least three transmission ratio ranges, a total power is guidable between a transmission input shaft and a transmission output shaft by the variator. A friction wheel of the variator is approximately cone-shaped, at least in sections.

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