Patent · US Active

Continuously variable transmission device having power split

US8777790B2 · kind B2 · utility

2Cited by

2References

12Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Karl Grad · Ruderting, DE
Jurgen Pohlenz · Ravensburg, DE
Gerhard Bailly · Friedrichshafen, DE

Key dates

Filing date	Feb 14, 2011
Grant date	Jul 15, 2014
Priority date	—
Expiry date	Jun 21, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/62
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A continuously variable transmission device (1) has a power split which takes place in the area of a sum planetary transmission (9). A first shaft (8) of the sum planetary transmission (9) can be brought into operational connection with a drive engine or machine (3). A second shaft (12) of the sum planetary transmission (9) can be connected, for continuous variation of the gear ratio, with an electric machine (36) which itself can be coupled with an electric energy source (38).

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