Abstract: Torsional vibration damper for a drivetrain of a motor vehicle, having a primary element rotatable around a rotational axis and a secondary element rotatable relative to the primary element against an energy storage. The energy storage includes a helical compression spring unit. The helical compression spring unit is provided in a spring channel, and the helical compression spring unit includes an outer spring. The outer spring is formed as an arc spring and an inner spring is provided inside of the outer spring and virtually coaxial to the outer spring. The inner spring when disassembled from the helical compression spring unit is formed as a straight helical compression spring. The inner spring has a winding direction that is opposed to a winding direction of the outer spring and the inner spring when installed in the torsional vibration damper, is shorter than the outer spring by a value of x.

Abstract: A tuned mass vibration damper for damping a vibration component of a rotational movement, has at least one guide component part configured to movably guide the damper masses such that the damper masses are offset along a circumferential direction, and a dimensionally stable spacer component part that is rotatable relative to the guide component part and which has a positive engagement connection with clearance with the damper masses that are configured such that, starting from a center position of the damper masses with respect to the spacer component part, when one of the damper masses executes an oscillation which overcomes a clearance in the connections of two of the damper masses with respect to the spacer component part, the spacer component part is rotated along the circumferential direction such that it drives the other damper mass of the two damper masses along the circumferential direction.

Abstract: A starting element has a torsional vibration damper coupleable with a drive with a drive-side input element rotatable against an action of a first spring element and a driven-side output component rotatable against the action of a second spring element arrangement around an axis of rotation. The driven-side output component is coupled with an output of the starting element. A hydrodynamic coupling device has a turbine and a turbine flange connected therewith fixed with respect to rotation. The turbine flange is coupled with the output to be fixed with respect to rotation a first connection. A tuned mass damper a mass damper support element coupled with an intermediate transmission arrangement by a second mechanical connection. The mass damper support element extends opposite to a radial direction perpendicular to the axis of rotation to a component of the output.

Abstract: A tuned mass vibration damper for damping a vibration component of a rotational movement, has at least one guide component part configured to movably guide the damper masses such that the damper masses are offset along a circumferential direction, and a dimensionally stable spacer component part that is rotatable relative to the guide component part and which has a positive engagement connection with clearance with the damper masses that are configured such that, starting from a center position of the damper masses with respect to the spacer component part, when one of the damper masses executes an oscillation which overcomes a clearance in the connections of two of the damper masses with respect to the spacer component part, the spacer component part is rotated along the circumferential direction such that it drives the other damper mass of the two damper masses along the circumferential direction.

Abstract: A spring includes at least one spring portion that extends over an arc of at least 90° when projected onto a cross-sectional area perpendicular to a force direction of the spring in an unloaded condition thereof. The spring portion has an elliptical shape in the projection. A system including one or more springs is also described.

Abstract: A starting element has a torsional vibration damper coupleable with a drive with a drive-side input element rotatable against an action of a first spring element and a driven-side output component rotatable against the action of a second spring element arrangement around an axis of rotation. The driven-side output component is coupled with an output of the starting element. A hydrodynamic coupling device has a turbine and a turbine flange connected therewith fixed with respect to rotation. The turbine flange is coupled with the output to be fixed with respect to rotation a first connection. A tuned mass damper a mass damper support element coupled with an intermediate transmission arrangement by a second mechanical connection. The mass damper support element extends opposite to a radial direction perpendicular to the axis of rotation to a component of the output.

Abstract: A spring includes at least one spring portion that extends over an arc of at least 90° when projected onto a cross-sectional area perpendicular to a force direction of the spring in an unloaded condition thereof. The spring portion has an elliptical shape in the projection. A system including one or more springs is also described.