Interrelated power delivery controls – including engine control – Transmission control – Engine controlled by transmission
Reexamination Certificate
2011-07-12
2011-07-12
Pang, Roger (Department: 3655)
Interrelated power delivery controls, including engine control
Transmission control
Engine controlled by transmission
C477S124000, C477S184000, C475S209000, C074S335000
Reexamination Certificate
active
07976431
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 a 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 and have two shift positions and one neutral position such that, during a range change gear shift both in the main transmission and the range change group a change between two ratio stages occurs. A range change up-shift includes synchronizing the input shaft and the target gear utilizing the transmission brake and passively synchronizing the dog shifted transmission parts by the edge beveling of the concerned dog clutches.
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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.
Pang Roger
ZF Friedrichshafen AG
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