Machine element or mechanism – Gearing – Interchangeably locked
Patent
1993-11-03
1995-09-19
Marmor, Charles A.
Machine element or mechanism
Gearing
Interchangeably locked
74473R, 74477, 74DIG7, 340456, F16H 6100
Patent
active
054507677
ABSTRACT:
A transmission includes a plurality of shift rails, each of which is axially movable forwardly and rearwardly from a center neutral position to respective gear engaging positions. The lower shift rails are provided for manual shifting among the lower gear ratios of the transmission. The highest shift rail is provided for selective manual or automatic shifting among the highest two gear ratios of the transmission. An idler rail is disposed adjacent to the highest shift rail. For manual shifting, the idler rail is connected to the highest shift rail, and a manually operable shift lever is used to move both the idler rail and the highest shift rail. For automatic shifting, the idler rail is disconnected from the highest shift rail, and an automatic shift member is moved into cooperation with the highest shift rail. Rotation of the automatic shift shaft causes corresponding movement of the automatic shift member. An electronic controller is provided for controlling the automatic shifting of the transmission in response to sensed operating conditions of the vehicle. A circuit is provided for sensing the rotational position of the automatic shift shaft and for generating an electrical signal which is representative of the actual position thereof, which is also representative of the actual position of the highest shift rail, to the electronic controller.
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Baer Kurt R.
Loeffler John M.
Schwaiger Dennis D.
Willford George A.
Dana Corporation
Grabow Troy
Marmor Charles A.
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