PatentsDB

Multigroup transmission of a motor vehicle

US9068636B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-9068636-B2
Application numberUS-99158409-A
CountryUS
Kind codeB2
Filing dateMay 5, 2009
Priority dateJun 9, 2008
Publication dateJun 30, 2015
Grant dateJun 30, 2015

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  1. Title

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  2. Abstract

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  3. Assignees and inventors

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  4. Key dates

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  5. First independent claim

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  6. CPC / IPC classifications

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  7. Citations and related patents

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Abstract

Official abstract text for this publication.

A multi-group transmission of a vehicle having a motor connected to an input shaft of the transmission, via a starting element, and the transmission comprises a splitter group, a main group and a main transmission shaft, on the drive output side. A powershift unit can couple the input shaft to the main transmission shaft for engaging an intermediate gear during a gearshift. The powershift unit and a shifting device for engaging gear constants of the splitter group are an integrated unit. During operating the transmission, with the starting element at least partly engaged during intermediate gear engagement, the powershift unit operates in a slipping mode and supports torque of the motor at the main transmission shaft while rotation of the motor is synchronized with a target gear. After which, an original gear is disengaged while free from load, the target gear is engaged when synchronized, and the intermediate gear is again disengaged.

First claim

Opening claim text (preview).

The invention claimed is: 1. A multi-group transmission of a motor vehicle comprising: an upstream splitter group ( 2 ), a transmission input shaft ( 7 ) for the transmission being connectable, via a starting element ( 16 ), with a drive motor ( 5 ), a main transmission shaft ( 30 ) providing an output of the transmission, and an integrated structural unit ( 17 ) comprising both a powershifter ( 40 ) and a shifting device ( 39 ), and at least a portion of each of the powersh…

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Frequently asked questions

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What does patent US9068636B2 cover?
A multi-group transmission of a vehicle having a motor connected to an input shaft of the transmission, via a starting element, and the transmission comprises a splitter group, a main group and a main transmission shaft, on the drive output side. A powershift unit can couple the input shaft to the main transmission shaft for engaging an intermediate gear during a gearshift. The powershift unit …
Who is the assignee on this patent?
Dittrich Alan, Gersten Rayk, Zahnradfabrik Friedrichshafen
What technology area does this patent fall under?
Primary CPC classification F16H37/042. Mapped technology areas include Mechanical Engineering.
When was this patent published?
Publication date Tue Jun 30 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).