Vibration damper and motor vehicle

Patent metadata

Field	Value
Publication number	US-10245913-B2
Application number	US-201515519056-A
Country	US
Kind code	B2
Filing date	Sep 15, 2015
Priority date	Oct 14, 2014
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A vibration damper with a piston, a piston rod fastened to the piston, a working chamber divided by the piston into a first working chamber and second working chamber, and a generator drivable by movement of the piston rod. The damping force of the vibration damper can be influenced by energization of the generator. An energizable component part is provided that short-circuits the windings of the generator when unenergized and cancels the short circuit when energized.

First claim

The invention claimed is:

1. A vibration damper comprising:
a piston;
a piston rod fastened to the piston;
a working chamber divided by the piston into a first working chamber and second working chamber;
a generator drivable by a movement of the piston rod, wherein a damping force of the vibration damper is influenced by energization of the generator; and
an energizable component part that is configured to short-circuit windings of the generator when unenergized and cancels the short circuit when energized.

2. The vibration damper according to claim 1 , wherein the energizable component part is a relay.

3. The vibration damper according to claim 1 , wherein the energizable component part is arranged at the generator.

4. The vibration damper according to claim 1 , wherein an energy supply device is provided that supplies the energizable component part.

5. The vibration damper according to claim 4 , wherein the energy supply device is a capacitor.

6. The vibration damper according to claim 1 , wherein the generator is coupled to a hydraulic motor.

7. The vibration damper according to claim 6 , wherein the hydraulic motor is constructed as a pump.

8. The vibration damper according to claim 6 , wherein the hydraulic motor has a reversal of rotational direction.

9. A vibration damper comprising:
a piston;
a piston rod fastened to the piston;
a working chamber divided by the piston into a first working chamber and second working chamber;
a generator drivable by a movement of the piston rod, wherein a damping force of the vibration damper is influenced by energization of the generator; and
an energizable component part that is configured to short-circuit windings of the generator when unenergized and cancels the short circuit when energized,
wherein the energizing of the energizable component part can be stopped depending on at least one of an operating parameter and a driving parameter.

10. A motor vehicle comprising:
at least one vibration damper comprising:
a piston;
a piston rod fastened to the piston;
a working chamber divided by the piston into a first working chamber and second working chamber;
a generator drivable by a movement of the piston rod, wherein a damping force of the at least one vibration damper is influenced by energization of the generator; and
an energizable component part that is configured to short-circuit windings of the generator when unenergized and cancels the short circuit when energized.

11. The vibration damper according to claim 2 , wherein the energizable component part is arranged at the generator.

12. The vibration damper according to claim 3 , wherein an energy supply device is provided that supplies the energizable component part.

13. The vibration damper according to claim 7 , wherein the hydraulic motor has a reversal of rotational direction.

14. The motor vehicle according to claim 10 , wherein the energizing of the energizable component part can be stopped depending on at least one of an operating parameter and a driving parameter.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Thomae Achim
• Baalmann Helmut
• Broocks Wilhelm-Heinrich
• Lichtlein Oswald
• Heyn Steffen
• Förster Andreas
• Gajek Joachim
• Pradel Robert
• Sonnemann Anke

Classifications

• B60G13/14 Primary

  having dampers accumulating utilisable energy, e.g. compressing air {(fluid springs with an accumulator B60G11/30)} · CPC title

• B60G2204/62

  Adjustable continuously, e.g. during driving · CPC title

• F16F2230/24

  Detecting or preventing malfunction, e.g. fail safe · CPC title

• F16F9/10

  using liquid only; using a fluid of which the nature is immaterial · CPC title

• B60G2206/41

  Dampers · CPC title