Thermally isolated composite exciter ring

Patent metadata

Field	Value
Publication number	US-10837510-B2
Application number	US-201815949129-A
Country	US
Kind code	B2
Filing date	Apr 10, 2018
Priority date	Apr 10, 2018
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A composite exciter ring for use in a vehicle brake system includes a base layer and a cover layer that is disposed on the base layer. The base layer is made of a ceramic material that insulates the cover layer from a heat source generated during brake activation. The cover layer is made of a plastic material and that defines openings. Each opening exposes a different part of the base layer. The ceramic material includes an additive infused therein. The additive has an effect on a magnetic field.

First claim

The invention claimed is:

1. A composite exciter ring for use in a vehicle brake system, comprising:
a base layer; and
a cover layer that is disposed on the base layer, wherein
the base layer is made of a material that insulates the cover layer from a heat source generated during brake activation,
the cover layer is made of a material and that defines openings, each opening exposing a different part of the base layer, wherein
the material of the base layer includes an additive infused therein, the additive having an effect on a magnetic field, and
the base layer is made of a ceramic material.

2. The composite exciter ring according to claim 1 , wherein the cover layer is made of a plastic material.

3. The composite exciter ring according to claim 2 , wherein the additive is a magnetically permeable material having low magnetic retentivity.

4. The composite exciter ring according to claim 3 , wherein the additive is infused only in the exposed different parts of the base layer, such that the rest of the base layer is substantially devoid of the additive.

5. The composite exciter ring according to claim 4 , wherein an amount of the additive infused to the ceramic material corresponds to a minimum amount needed to alter the magnetic field.

6. The composite exciter ring according to claim 5 , wherein the additive is ferritic.

7. The composite exciter ring according to claim 6 , wherein the base layer and the cover layer are substantially ring shaped.

8. The composite exciter ring according to claim 7 , wherein the cover layer is disposed radially inward relative to the base layer, such that a region of the base layer that is radially outward relative to the cover layer is fully exposed.

9. The composite exciter ring according to claim 8 , wherein the base layer defines therein openings configured to receive a fastener that couples the composite exciter ring to another brake component.

10. An air brake system for a vehicle comprising:
a rotating member configured to rotate in response to a motion of the vehicle;
the composite exciter ring according to claim 2 , wherein
the composite exciter ring is coupled to the rotating member and the base layer is in contact with the rotating member; and

a sensor configured to respond to a change in its magnetic field when in proximity to the rotating base layer.

11. The air brake system according to claim 10 , wherein the rotating member is one of a brake rotor, a drum, and a wheel hub.

12. A composite exciter ring for use in a vehicle brake system, comprising:
a base layer that is made of a ceramic material; and
a cover layer that is made of a plastic material and that is disposed on the base layer, wherein
the base layer is configured to thermally insulate the cover layer from a heat source generated during operation of the vehicle brake system,
the cover layer defines openings that are configured to expose first parts of the base layer, while covering second parts of the base layer, the first and second parts being arranged next to one another in an alternating fashion along a given direction, and
the ceramic material includes an additive infused therein that has an effect on a magnetic field.

13. The composite exciter ring according to claim 12 , wherein the additive is infused only in the first parts where the base layer is exposed, such that the rest of the base layer is substantially devoid of the additive.

14. The composite exciter ring according to claim 13 , wherein the additive is a magnetically permeable material.

15. The composite exciter ring according to claim 14 , wherein an amount of the additive corresponds to a minimum amount needed to alter the magnetic field.

16. The composite exciter ring according to claim 15 , wherein the additive is ferritic.

17. The composite exciter ring according to claim 16 , wherein the base layer and the cover layer are substantially ring shaped.

18. The composite exciter ring according to claim 17 , wherein the cover layer is disposed radially inward relative to the base layer, such that a region of the base layer that is radially outward of the cover layer is fully exposed.

19. The composite exciter ring according to claim 18 , wherein the base layer defines therein openings configured to receive a fastener that couples the composite exciter ring to another brake component.

Assignees

• Bendix Spicer Foundation Brake

Inventors

• Sabeti Manouchehr
• Hantak Kevin D
• Seaman James A

Classifications

• G01P3/487 Primary

  delivered by rotating magnets · CPC title

• F16D2066/003

  Position, angle or speed · CPC title

• F16D65/127 Primary

  characterised by properties of the disc surface; Discs lined with friction material · CPC title

• B60T8/329

  Systems characterised by their speed sensor arrangements · CPC title

• B60T8/1761

  responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure · CPC title