VEHICULAR ACTUATOR SYSTEM

• US 20100094503A1
• Filed: 10/15/2008
• Published: 04/15/2010
• Est. Priority Date: 10/15/2008
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (Motors Liquidation Co. GUC Trust)
• Inventors: NAMUDURI, CHANDRA S., ELLIOTT, ROBERT B., LI, YUNJUN, MCMAHON, NANCY
• Granted Patent: US 8,160,774 B2
• Time in Patent Office: Days
• US Class Current: 701/37
• CPC Class Codes: B60G 13/001 Arrangements for attachment of dampers mounting arrangements of combined spring and damper units B60G15/00; mountings of fluid dampers in general F16F9/54
• CPC Class Codes: B60G 17/019 characterised by the type of sensor or the arrangement thereof B60G17/01941 takes precedence
• CPC Class Codes: B60G 2204/128 Damper mount on vehicle body or chassis
• CPC Class Codes: B60G 2204/129 Damper mount on wheel suspension or knuckle
• CPC Class Codes: B60G 2400/252 vertical
• CPC Class Codes: B60G 2401/172 Hall effect
• CPC Class Codes: B60G 2800/702 Improving accuracy of a sensor signal

Abstract

An actuator system for determining a relative height differential between a housing of an actuator assembly and a body of the actuator assembly for a vehicle is provided. The vehicle has a suspension wherein the housing is coupled to a first portion of the suspension, and the body is coupled to a second portion of the suspension. The system comprises a sensor coupled to the inside of the housing, and a target coupled to the outside of the body, the sensor and the target cooperating to form a magnetic field that varies in a manner indicative of the distance therebetween.

Claims

1. An actuator system for determining a relative height differential between a housing of an actuator assembly and a body of the actuator assembly for a vehicle, the vehicle having a suspension, the housing coupled to a first portion of the suspension, and the body coupled to a second portion of the suspension, the system comprising:

a sensor coupled to the inside of the housing; and

a target coupled to the outside of the body, the sensor and the target cooperating to form a magnetic field that varies in a manner indicative of the distance therebetween.

2. A system according to claim 1, wherein the sensor generates the magnetic field, and the target and sensor interact with the magnetic field in a manner indicative of the distance between the sensor and the target.

3. A system according to claim 1, wherein the target generates the magnetic field, and the sensor and the target interact with the magnetic field in a manner indicative of the distance between the sensor and the target.

4. A system according to claim 1, wherein the suspension further comprises a sprung mass and an unsprung mass, and wherein the housing is coupled to one of the sprung mass or the unsprung mass, and the body is coupled to the other of the sprung mass or the unsprung mass.

5. A system according to claim 1, wherein the actuator assembly is a linear actuator assembly.

6. A system according to claim 1, wherein the actuator assembly is a damper assembly.

7. A system according to claim 1, wherein the housing comprises an inner surface, and the sensor is fixedly mounted to the inner surface of the housing.

8. A system according to claim 1, wherein the sensor generates a signal indicative of the position of the target with respect to the sensor, and further comprising an electronics assembly coupled to the sensor, and configured to receive the signal and determine the relative height differential therefrom.

9. A system according to claim 8, wherein the electronics assembly is disposed within the housing.

10. A system according to claim 8, wherein the electronics assembly comprises a processor.

11. A system according to claim 8, wherein the vehicle further comprises a suspension controller, and the housing further comprises an opening, and further comprising a connector coupled through the opening for electrically coupling the sensor to the controller.

12. A damper system for determining a relative height differential between a sprung mass of a vehicle and an unsprung mass of the vehicle, the vehicle having a damper assembly with a housing coupled to the sprung mass and a damper tube coupled to the unsprung mass, the system comprising:

a sensor coupled to the inside of the housing; and

a target coupled to the outside of the damper tube, the sensor and the target cooperating to form a magnetic field that varies in a manner indicative of the distance therebetween.

13. A system according to claim 12, wherein the sensor generates the magnetic field, and the target and sensor interact with the magnetic field in a manner indicative of the distance between the sensor and the target.

14. A system according to claim 12, wherein the target generates the magnetic field, and the sensor and the target interact with the magnetic field in a manner indicative of the distance between the sensor and the target.

15. A system according to claim 12, wherein the housing comprises an inner surface, and the sensor is fixedly mounted to the inner surface of the housing in a substantially conformal manner.

16. A system according to claim 12, wherein the damper assembly further comprises a jounce bumper coupled to the inside of the housing, the jounce bumper having a recess, and the sensor is disposed within the recess in the jounce bumper.

17. A system according to claim 12, wherein the sensor generates a signal indicative of the position of the target with respect to the sensor, and further comprising an electronics assembly coupled to the sensor, and configured to receive the signal and determine the relative height differential therefrom.

18. A system according to claim 17, wherein the electronics assembly is disposed within the housing.

19. A system according to claim 17, wherein the electronics assembly comprises a processor integrated with the sensor.

20. A damper system for determining a relative height differential between a sprung mass of a vehicle and an unsprung mass of the vehicle, the system including a damper assembly having a housing coupled to the sprung mass, and a damper tube coupled to the unsprung mass, the system comprising:

a sensor coupled to the inside of the housing for generating a magnetic field;

a target coupled to the outside of the damper tube for interacting with the magnetic field in a manner indicative of the position of the target relative to the sensor; and

a processor coupled to the sensor for determining the relative height differential.