BRAKE LINING WITH DEVICE FOR REDUCING NOISES

• US 20160010708A1
• Filed: 07/09/2015
• Published: 01/14/2016
• Est. Priority Date: 07/10/2014
• Status: Abandoned Application

• Current Assignee: Federal-Mogul Bremsbelag Gmbh (Apollo Global Management, Inc.)
• Original Assignee: Federal-Mogul Bremsbelag Gmbh (Apollo Global Management, Inc.)
• Inventors: Wernitz, Boris, Schumacher, Heribert, Giese, Andreas
• Application Number:
  US14/795,020
• Publication Number:
  US 20160010708A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F16D 65/0012 Active vibration dampers
• CPC Class Codes: F16D 65/092 for axially-engaging brakes, e.g. disc brakes
• CPC Class Codes: F16F 15/007 Piezoelectric elements being placed under pre-constraint, e.g. placed under compression

Abstract

In order to further improve a brake lining comprising a support body and a friction lining arranged on the support body in such a manner that undesirable noises, in particular undesirable squealing can be avoided or reduced in as cost-effective as possible a manner, it is proposed for the noise reduction by means of a mechanical oscillation on or in the brake lining to arrange an actuator for generating the mechanical oscillation, wherein the actuator can be excited by an electrical signal.

Claims

1. A brake lining comprising a support body and a friction lining arranged on the support body, characterized in that for noise reduction by means of a mechanical oscillation on or in the brake lining, an actuator for creating the mechanical oscillation is arranged, wherein the actuator can be excited by an electrical signal.

2. The brake lining according to claim 1, characterized in that the actuator comprises a piezo element or multiple piezo elements or consists of a piezo element or of multiple piezo elements.

3. The brake lining according to claim 2, characterized in that a piezo element comprises a piezoelectric ceramic material or in that multiple piezo elements comprise a piezoelectric ceramic material.

4. The brake lining according to claim 1, characterized in that the actuator is designed in such a manner that the same when excited by means of an electrical alternating voltage and/or of a noise signal creates the mechanical oscillation with a frequency greater than 16 kHz.

5. The brake lining according to claim 1, characterized in that the actuator is designed as a layered structure with multiple layers, wherein multiple piezo elements are arranged on top of one another and wherein between each two piezo elements an electrode is arranged.

6. The brake lining according to claim 1, characterized in that the actuator is arranged on or in the support body and/or on or in the friction lining and/or on a damping plate that is rigidly connected to the support body.

7. The brake lining according to claim 1, characterized in that the actuator is arranged on the brake lining in a pressure region of a pressure means of a brake.

8. The brake lining according to claim 1, characterized in that on or in the brake lining connection elements for electrically connecting the actuator to a control system are arranged.

9. A brake for a vehicle, characterized in that the brake comprises a brake lining according to claim 1.

10. A control system for actively activating and actuator, characterized in that the actuator is arranged in or on a brake lining according to claim 1.

11. A method for reducing noises of a brake, characterized in that an actuator arranged in or on a brake lining according to claim 1 is actively activated by means of an electrical voltage.

12. The method according to claim 11, characterized in that the actuator is activated by means of an electrical alternating voltage and/or of a noise signal, wherein the electrical alternating voltage and/or the noise signal has a frequency which substantially corresponds to the natural frequency of the actuator or a harmonic of this natural frequency.

13. The method according to claim 11, characterized in that the activation is carried out as open-loop activation, during which no measurement values are detected by the actuator.