Patent ID: 6126568
Filing Date: 2000-10-03
Classification: F16H

Abstract:
A combination comprising: a hydrodynamic torque converter having a housing, a driven-side structural component part and a lock-up clutch having a piston; and a torsional vibration damper for the lock-up clutch, the torsional vibration damper comprising:a driven-side transmission element constructed as a sun gear;a drive-side transmission element constructed as a planet carrier which can be brought into a working connection with the converter housing; andcoupling means for connecting the drive-side transmission element with the driven-side transmission element, the coupling means including a circumferentially acting energy accumulator having springs, the driven-side transmission element being fixed with respect to rotation relative to the driven-side structural component part of the torque converter, the transmission elements, together with the coupling means forming a planetary gear set having elements, in addition to the transmission elements and the coupling means, that include a planet wheel that is received on the planet carrier and engages with at least one other element of the planetary gear set, the planet carrier being fixed to the piston of the lock-up clutch, the at least one other element of the planetary gear set being connected by the energy accumulator with at least one of the transmission elements so as to act relative to the at least one transmission element as an intermediate mass which is drivable for a movement depending on a rate of rotation and rotational direction of the transmission elements relative to one another, the sun gear engaging with the planet wheel and being connected with the drive-side transmission element via the energy accumulator, the sun gear having a radial inner side provided with a toothing that engages with a complementary toothing at the driven-side structural component part so as to be fixed with respect to rotation relative to the driven-side structural component part, the gear set elements defining a mass matrix with a secondary diagonal that forms a decoupling frequency, the planetary gear set having a gear multiplication and the gear set elements in the mass matrix and the springs of the energy accumulator, given in a stiffness matrix, being configured to have mass moments of inertia so that the decoupling frequency is adapted to a predetermined resonant frequency of a motor vehicle drivetrain for reducing the amplitude of the resonant frequency.