Interrelated power delivery controls – including engine control – Transmission control – With clutch control
Reexamination Certificate
2011-02-01
2011-02-01
Wright, Dirk (Department: 3655)
Interrelated power delivery controls, including engine control
Transmission control
With clutch control
Reexamination Certificate
active
07878942
ABSTRACT:
A method for shifting an automated transmission situated in a drive train of a motor vehicle between an engine and a drive axle and having at least one multi-speed main transmission and a two-speed range change group rear-mounted thereon. The main transmission has at least one counter-shaft with an transmission brake. A clutch engages the prime mover and the main transmission and the range change group is shifted via unsynchronized dog clutches, which are combined in pairs in a common shift set having two shift positions and one neutral position such that during a range change gearshift, both in the main transmission and in the range change group, a change between two ratio stages occurs. A range change up-shift and down-shift each include active synchronization of the dog clutch by way of the transmission brake and of the separating clutch.
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“Die ZF-AS-Tronic-Familie”, Automatische Getriebe für alle Nutzfahrzeugklassen,Zeitschrift ATZSep. 2004, pp. 772-783.
Bader Josef
Graf Andreas
Hafen Thomas
Miller Martin
Steinborn Mario
Davis & Bujold P.L.L.C.
Wright Dirk
ZF Friedrichshafen AG
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