Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Clutch control
Reexamination Certificate
2007-03-20
2007-03-20
Nguyen, Thu V. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Clutch control
Reexamination Certificate
active
11020000
ABSTRACT:
A torque transfer system for transferring torque between a first rotary member and a second rotary member includes a clutch pack that is operably disposed between the first rotary member and the second rotary member to regulate torque transfer therebetween and a clutch actuator for regulating engagement of the clutch pack. A controller generates a dithered control signal by superimposing a dithering signal onto a digital control signal. The controller determines a time averaged duty cycle DCavgof the dithered control signal, determines an amplitude AMP of the dithered control signal, determines a wave function WF that describes a wave shape of the dithered control signal and calculates a pulse duty cycle PDC for each pulse of the dithered control signal using the average duty cycle, amplitude, and wave function.
REFERENCES:
patent: 5924703 (1999-07-01), Ichimaru
patent: 2002/0016653 (2002-02-01), Levine
patent: 2003/0058506 (2003-03-01), Green et al.
patent: 2003/0114969 (2003-06-01), Dominke et al.
Bansbach Eric A.
Smith William E.
Magna Powertrain USA, Inc.
Nguyen Thu V.
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