Rotational damper for a motor vehicle

Patent metadata

Field	Value
Publication number	US-9597942-B2
Application number	US-201415023204-A
Country	US
Kind code	B2
Filing date	Jul 19, 2014
Priority date	Sep 20, 2013
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A rotational damper for a motor vehicle, includes a gyro element which includes a first shaft mounted such that it can be rotated with respect to a first component and is connected to a second component which performs a relative movement with respect to the first component, wherein the first shaft has a frame, in which a second shaft lies orthogonally and is mounted rotatably, wherein the second shaft has a frame, in which a third shaft is mounted orthogonally with respect to the second shaft and such that it can be rotated in the second frame, wherein the second shaft and the third shaft are each connected to a shaft drive, and the third shaft has an inertia weight, wherein a rotation of the second shaft by the second shaft drive brings about a change in the angular velocity or the moment of the first shaft which is connected to the second component.

First claim

The invention claimed is:

1. A rotational damper for a motor vehicle, comprising:
a gyro element, said gyro element comprising
a first shaft, supported for rotation relative to a first component and connected with a second component, which performs a relative movement relative to the first component, said first shaft having a first frame,
a second shaft rotatably supported in the first frame and arranged orthogonal to the first shaft, said second shaft having a second frame, said second shaft being connected with a first shaft drive, and
a third shaft rotatably supported in the second frame and arranged orthogonal to the second shaft, said third shaft being connected with a second shaft drive, wherein a rotation of the second shaft by the first shaft drive causes a change of an angular velocity or a change of a moment of the first shaft;
a first sensor for determining a rotation of the first shaft;
a control unit operatively connected with the second shaft drive for adjusting an angular velocity and/or a moment of the second shaft; and
a second sensor connected with a controller and adapted for determining a change in position of the first component.

2. The rotational damper arrangement of claim 1 , wherein the control unit is connected with the second shaft drive so that the second shaft drive is capable of increasing the angular velocity and/or the moment of the second shaft.

3. The rotational damper arrangement of claim 1 , wherein the first sensor is adapted for measuring an angular velocity or a moment of the first shaft and is connected with the control unit, said control unit controlling the angular velocity or the moment of the first shaft by using the angular velocity or the torque measured by the first sensor as a control value.

4. The rotational damper arrangement of claim 1 , wherein the control unit controls the second shaft by introducing energy into or withdrawing energy from the second shaft drive by using the moment of the second shaft as a manipulated variable.

5. The rotational damper arrangement of claim 1 , further comprising detection devices, which detect an angular position of the first shaft and the second shaft as input variables for the control unit.

6. The rotational damper arrangement of claim 1 , wherein a transmission ratio between individual torques of the first, second and third shafts is a function of a rotational inertia of the inertia weight.

7. A method for controlling a rotational damper arrangement, comprising:
providing the rotational damper arrangement of claim 1 ;
controlling the torque of the first shaft and/or the angular velocity of the first shaft as a control variable; and
influencing a manipulated variable of the second shaft so that a sign of an acceleration of the third shaft corresponds to a sign of an angular velocity of the third shaft.

8. The method of claim 7 , further comprising storing a damper characteristic curve of the moment of the first shaft as a function of the angular velocity of the first shaft, wherein a set value for controlling the control variable is dependent on the measured angular velocity of the first shaft.

9. A cardanically supported gyro element for damping a movement of a first component of a motor vehicle relative to a second component of the motor vehicle, said gyro element comprising:
a first shaft, supported for rotation relative to the first component and connected with the first component, said first shaft having a first frame,
a second shaft rotatably supported in the first frame and arranged orthogonal to the first shaft, said second shaft having a second frame, said second shaft being connected with a first shaft drive, and
a third shaft rotatably supported in the second frame and arranged orthogonal to the second shaft, said third shaft being connected with a second shaft drive, wherein a rotation of the second shaft by the first shaft drive causes a change of an angular velocity or a change of a moment of the first shaft, wherein the first component is a sprung mass of the motor vehicle and the second component is an unsprung mass of the motor vehicle.

Assignees

• Audi Ag
• Karlsruher Inst Für Tech

Inventors

• Koch Tilo
• Gauterin Frank
• Scheurich Bastian

Classifications

• B60G21/08 Primary

  characterised by use of gyroscopes (gyroscopes for stabilising vehicle bodies without controlling suspension arrangements B62D37/06) · CPC title

• B60G2202/22

  Rotary Damper · CPC title

• F16F15/02 Primary

  Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems ({F16F15/005 takes precedence } ; layered products B32B; suppression of vibration in ships B63; {relieving load on bearings, using magnetic means F16C39/06}) · CPC title

• B60G2401/28

  Gyroscopes · CPC title