Machine element or mechanism – Gearing – Interchangeably locked
Reexamination Certificate
2006-03-07
2008-10-07
Le, David D. (Department: 3681)
Machine element or mechanism
Gearing
Interchangeably locked
C074S335000, C074S346000, C192S003580, C192S048200, C192S052400, C192S083000, C192S10900B
Reexamination Certificate
active
07430936
ABSTRACT:
A method for controlling operational sequencing of gears in an automatic transmission (102) which has been built in an auxiliary mode. In the case of such a shifting transmission it is possible that during the engagement of its transmission gear stage, impact noises or contact noises are present in the shifting procedure. This can occur by the generation of a tooth-on-tooth positioning between the toothing of a sliding collar (126) and the come-along toothing of an idler gear (130, 132). Provision is made for the control of the activation movement of the sliding collar (126) carried out in such a manner that an activation condition impact of the transmission parts, which are partakers in the shifting associated transmission part onto other transmission parts with the least possible impact force and/or with a least possible impact noise level.
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Petzold Rainer
Steinborn Mario
Veittinger Stefan
Davis & Bujold & Daniels, P.L.L.C.
Le David D.
ZF Friedrichshafen AG
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