Patent ID: 7194350

Claim:
A torque transfer system for transferring torque between a first rotary member and a second rotary member, comprising: a clutch pack that is operably disposed between the first rotary member and the second rotary member to regulate torque transfer therebetween; a clutch actuator for regulating engagement of the clutch pack in response to a dithered control signal; and a controller for generating the dithered control signal by superimposing a dithering signal onto a digital control signal, wherein the controller determines a time averaged duty cycle DC avg of 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, calculates a pulse duty cycle PDC for each pulse of the dithered control signal using the average duty cycle, amplitude, and wave function and delivers the dithered control signal to the clutch actuator.