Patent · US Active

Method for blocking inadmissible gear shifts in a transmission and shift assembly for a transmission

US8219292B2 · kind B2 · utility

0Cited by

6References

19Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Andreas Fuessl · Kreßbronn, DE
Matthias Reisch · Ravensburg, DE
Ralf Dreibholz · Meckenbeuren, DE

Key dates

Filing date	Feb 20, 2009
Grant date	Jul 10, 2012
Priority date	—
Expiry date	Aug 9, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/20438
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A method is proposed for blocking inadmissible gearshift processes in a transmission with a plurality of shifting devices which, to carry out a shift process, are moved by actuating devices when a shift command is sent by a control unit (TCU) to the relevant actuating device. The actuating devices are connected for data exchange with one another and with the control unit (TCU) in such manner that the actuating device of the shifting device to be shifted is activated provided that clearance has been given by at least one other actuating device. In addition a shifting system is proposed for a transmission with a control unit and a plurality of actuating devices for the actuation of shifting devices, such that the actuating devices are associated with at least one shaft (A, B) and such that the actuating devices are connected for data exchange with one another and with the control unit (TCU) in such manner that the actuating device of the shifting device to be shifted can be activated provided that clearance has been given by at least one other actuating device.

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