Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Clutch control
Reexamination Certificate
2005-11-21
2008-12-16
Zanelli, Michael J. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Clutch control
C477S070000, C477S087000, C477S078000
Reexamination Certificate
active
07467038
ABSTRACT:
A method for detecting a rotational direction of the secondary side of a starting clutch in a motor vehicle string comprising the steps of determination of the primary speed of rotation of the primary side and of the secondary speed of rotation of the starting clutch. If the secondary speed of rotation is greater than the primary speed of rotation, an actuator operates in a closing direction, whereby the degree of closure of the starting clutch is adjusted to be dependent upon the acceleration of the secondary speed of rotation. A specified value for a rotational speed of the driving motor is produced which represents the secondary speed of rotation. To the extent that this value exceeds the value of the primary rotational speed, the rotational speed of the motor is regulated to the specified value. If the primary and secondary rotational speeds are equivalent within a preselected period of time, then detecting the same rotational direction for the primary and secondary sides of the starting clutch. If the rotational speed of the primary side of the starting clutch lies below the idling speed of rotation, detecting different rotational directions for the primary side and the secondary side of the starting clutch.
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Doebele Bernd
Wiencek Norbert
Davis & Bujold & Daniels, P.L.L.C.
Zanelli Michael J.
ZF Friedrichshafen AG
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