Wheel speed sensor for a utility vehicle

Patent metadata

Field	Value
Publication number	US-11988684-B2
Application number	US-202017595996-A
Country	US
Kind code	B2
Filing date	Jun 4, 2020
Priority date	Jun 6, 2019
Publication date	May 21, 2024
Grant date	May 21, 2024

Abstract

A wheel speed sensor for a utility vehicle, including: an active pulse sensor, a housing to at least partially enclose the active pulse sensor, and a protective cap to at least partially cover the housing; in which the wheel speed sensor has at least one component to adapt a temperature resistance capability of the wheel speed sensors so that the wheel speed sensor is usable in a high temperature environment.

First claim

The invention claimed is:

1. A wheel speed sensor for a utility vehicle, comprising:
an active pulse sensor,
a housing to at least partially enclose the active pulse sensor, and
a protective cap to at least partially cover the housing;
wherein the wheel speed sensor has at least one component to adapt a temperature resistance capability of the wheel speed sensors so that the wheel speed sensor is usable in a high temperature environment, and
wherein the active pulse sensor includes a magnetic sensor as the component to adapt the temperature resistance capability of the wheel speed sensor so that the wheel speed sensor is usable in the high temperature environment, and
wherein the wheel speed sensor has a region adjacent the active pulse sensor, and wherein the region has a thermal insulation medium that has a lower thermal conductivity than a thermal conductivity of a material of the housing.

2. The wheel speed sensor of claim 1 , wherein the wheel speed sensor has a closed cavity to enclose the thermal insulation medium therein.

3. The wheel speed sensor of claim 2 , wherein the thermal insulation medium includes air.

4. The wheel speed sensor of claim 2 , wherein the wheel speed sensor has multiple closed cavities.

5. The wheel speed sensor of claim 4 , wherein the multiple closed cavities are arranged adjacent to one another.

6. The wheel speed sensor of claim 5 , wherein the cavities have a honeycomb structure at least in regions.

7. The wheel speed sensor of claim 2 , wherein the cavity is or the cavities are provided between an outer surface of the housing and an inner surface of the protective cap.

8. The wheel speed sensor of claim 1 , wherein the AMR sensor is configured to detect a temperature of the wheel speed sensor.

9. A wheel speed sensor for a utility vehicle, comprising:
an active pulse sensor,
a housing to at least partially enclose the active pulse sensor, and
a protective cap to at least partially cover the housing;
wherein the wheel speed sensor has at least one component to adapt a temperature resistance capability of the wheel speed sensors so that the wheel speed sensor is usable in a high temperature environment, and
wherein the wheel speed sensor has a region between the active pulse sensor and an environment of the wheel speed sensor, which region has a thermal insulation medium that has a lower thermal conductivity than a thermal conductivity of a material of the housing, and wherein the at least one component includes the region to adapt the temperature resistance capability of the wheel speed sensor so that the wheel speed sensor is usable in the high temperature environment.

10. The wheel speed sensor of claim 9 , wherein the wheel speed sensor has a closed cavity to enclose the thermal insulation medium therein.

11. The wheel speed sensor of claim 10 , wherein the thermal insulation medium includes air.

12. The wheel speed sensor of claim 10 , wherein the wheel speed sensor has multiple closed cavities.

13. The wheel speed sensor of claim 12 , wherein the multiple closed cavities are arranged adjacent to one another.

14. The wheel speed sensor of claim 13 , wherein the cavities have a honeycomb structure at least in regions.

15. The wheel speed sensor of claim 14 , wherein the cavity is or the cavities are provided between an outer surface of the housing and an inner surface of the protective cap.

16. The wheel speed sensor of claim 9 , wherein the active pulse sensor includes an anisotropic magnetoresistive (AMR) sensor as the component to adapt the temperature resistance capability of the wheel speed sensor so that the wheel speed sensor is usable in a high temperature environment.

17. The wheel speed sensor of claim 16 , wherein the AMR sensor is configured to detect a temperature of the wheel speed sensor.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Kluftinger Andre
• Jawarikar Pravin
• Hauff Michael
• Windisch Andreas
• Rohse Tobias
• Lechner Klaus

Classifications

• G01P1/006 Primary

  used for thermal compensation · CPC title

• G01P3/44

  for measuring angular speed (G01P3/56 takes precedence) · CPC title

• B60T17/221 Primary

  Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems (hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M) · CPC title

• G01P1/026

  for speed measuring devices, e.g. pulse generator · CPC title

• G01P3/487

  delivered by rotating magnets · CPC title