Patent ID: 7694789

Claim:
A starting unit comprising: an input which can be coupled to a drive and an output that can be coupled to a driven part; a starting element in the form of a hydrodynamic component, comprising at least one primary blade wheel and one secondary blade wheel which, together, form a working chamber which can be filled with operating material; an engaging and disengaging clutch, comprising at least two clutch elements that can be brought into frictionally engaged contact with one another in a direct or indirect manner via additional intermediate elements, the first clutch element being at least indirectly connected to the input in a rotationally fixed manner and the second clutch element being at least indirectly connected to the output in a rotationally fixed manner, and a first adjusting device assigned thereto; a stationary or rotating housing that surrounds at least one of the blade wheels while forming an adjoining chamber; the first adjusting device of the engaging and disengaging clutch being situated in the adjoining chamber while forming a first operating means material supply channel or space and can be subjected to the action of pressure prevailing therein; the operating means material supply channel or space adapted to be connected at least indirectly to an operating means supply source; means for influencing the transmission behavior of the hydrodynamic component, comprising at least one mechanical built-in part supported on and rotatable with one of the blade wheels in the form of at least one separate element that can be introduced into the working chamber or of at least one element forming a sub-region of the wall of one of the blade wheels, that acts at least indirectly upon the working circuit ensuing inside the working chamber, the means for influencing reducing torque transmission by at least one of introducing the separate element into the working chamber to disturb the flow of the operating material or removing the element forming a sub-region of the wall to disturb the flow of the operating material; and a second adjusting device assigned to the mechanical built-in part and means for subjecting the second adjusting device to a differential pressure, which results from the pressure in the first operating means supply channel or space or in a channel or space coupled thereto or in the interior of the housing and to a control pressure.