Vehicle and a suspension system for the vehicle

Patent metadata

Field	Value
Publication number	US-9238391-B1
Application number	US-201414335391-A
Country	US
Kind code	B1
Filing date	Jul 18, 2014
Priority date	Jul 18, 2014
Publication date	Jan 19, 2016
Grant date	Jan 19, 2016

Abstract

A vehicle and a suspension system for the vehicle are disclosed. The suspension system includes a wheel knuckle and a control arm coupled to the wheel knuckle. The control arm includes a proximal end having a first arm segment and a second arm segment each extending outwardly from the proximal end away from each other to respective first and second distal ends to define a space between the first and second arm segments. The suspension system also includes a biasing device at least partially disposed in the space between the first and second arm segments. The biasing device is coupled to at least one of the first and second distal ends of the first and second arm segments respectively such that actuation of the biasing device provides a first reaction force that counteracts a downward load.

First claim

The invention claimed is:

1. A suspension system for a vehicle, the system comprising:
a wheel knuckle;
a control arm coupled to the wheel knuckle, with the control arm including a proximal end having a first arm segment and a second arm segment each extending outwardly from the proximal end away from each other to respective first and second distal ends to define a space between the first and second arm segments;
a biasing device at least partially disposed in the space between the first and second arm segments, with the biasing device coupled to at least one of the first and second distal ends of the first and second arm segments respectively such that actuation of the biasing device provides a first reaction force that counteracts a downward load acting on the control arm, with the first reaction force being substantially proportional to the downward load to substantially maintain a position of the wheel knuckle.

2. A system as set forth in claim 1 wherein the biasing device is disposed between the first and second distal ends of the first and second arm segments respectively, with the first and second distal ends spaced from each other along a longitudinal axis, and wherein the biasing device operates in a first mode to provide the first reaction force being substantially proportional to the downward load and a second mode to provide a second reaction force that counteracts the downward load acting on the control arm such that the second reaction force is different from the downward load which allows the control arm to selectively rotate about the longitudinal axis to change the position of the control arm relative to the wheel knuckle.

3. A system as set forth in claim 1 wherein the biasing device includes a torsion bar disposed in the space and extending along a longitudinal axis.

4. A system as set forth in claim 3 wherein the biasing device includes a housing attached to one of the first and second distal ends of the first and second arm segments respectively to couple the biasing device to the control arm, with the control arm and the housing being selectively rotatable about the longitudinal axis as a unit, and with the torsion bar at least partially disposed inside the housing.

5. A system as set forth in claim 3 wherein the biasing device includes a housing attached to both of the first and second distal ends of the first and second arm segments respectively to couple the biasing device to the control arm, with the control arm and the housing being selectively rotatable about the longitudinal axis as a unit, and with the torsion bar at least partially disposed inside the housing.

6. A system as set forth in claim 5 wherein the housing has a first length and the torsion bar has a second length greater than the first length such that the torsion bar extends outside of the housing.

7. A system as set forth in claim 6 wherein the torsion bar includes a first end portion and a second end portion spaced from each other along the longitudinal axis, with the second end portion being affixed to the housing and the first end portion being disposed outside of the housing, and wherein the first end portion of the torsion bar is selectively rotatable about the longitudinal axis to apply a torsional load to the torsion bar to provide the first reaction force that counteracts the downward load.

8. A system as set forth in claim 7 wherein the biasing device includes an actuator coupled to the first end portion of the torsion bar to selectively rotate the first end portion of the torsion bar.

9. A system as set forth in claim 8 wherein the actuator includes a motor coupled to the first end portion of the torsion bar to selectively rotate the first end portion of the torsion bar.

10. A system as set forth in claim 9 wherein the actuator includes a drive mechanism coupled to the motor and the first end portion of the torsion bar to selectively rotate the first end portion of the torsion bar.

11. A system as set forth in claim 1 wherein the control arm is further defined as a first control arm and further including a second control arm spaced from the first control arm, with the second control arm coupled to the wheel knuckle.

12. A system as set forth in claim 11 wherein the first control arm is coupled to the wheel knuckle above the second control arm.

13. A system as set forth in claim 1 further including a piston shock absorber coupled to the wheel knuckle and partially disposed in the space between the first and second arm segments.

14. A system as set forth in claim 1 wherein the biasing device is coupled to both of the first and second distal ends of the first and second arm segments respectively to couple the biasing device to the control arm, with the control arm and the housing being selectively rotatable as a unit.

15. A vehicle comprising:
a structure;
a suspension system supporting the structure, the system comprising:
a wheel knuckle;
a control arm coupled to the wheel knuckle, with the control arm including a proximal end having a first arm segment and a second arm segment each extending outwardly from the proximal end away from each other to respective first and second distal ends to define a space between the first and second arm segments; and
a biasing device at least partially disposed in the space between the first and second arm segments, with the biasing device coupled to at least one of the first and second distal ends of the first and second arm segments respectively such that actuation of the biasing device provides a first reaction force that counteracts a downward load applied to the structure, with the first reaction force being substantially proportional to the downward load to substantially maintain a vertical position of the structure relative to the wheel knuckle.

16. A vehicle as set forth in claim 15 wherein the biasing device is disposed between the first and second distal ends of the first and second arm segments respectively, with the first and second distal ends spaced from each other along a longitudinal axis, and wherein the biasing device operates in a first mode to provide the first reaction force being substantially proportional to the downward load and a second mode to provide a second reaction force that counteracts the downward load applied to the structure, with the second reaction force being different from the downward load which allows the control arm to selectively rotate about the longitudinal axis to change the vertical position of the structure relative to the wheel knuckle.

17. A vehicle as set forth in claim 15 wherein the biasing device includes a torsion bar disposed in the space and extending along a longitudinal axis.

18. A vehicle as set forth in claim 17 wherein the biasing device includes a housing attached to both of the first and second distal ends of the first and second arm segments respectively to couple the biasing device to the control arm, with the control arm and the housing being selectively rotatable about the longitudinal axis as a unit, and with the torsion bar at least partially disposed inside the housing.

19. A vehicle as set forth in claim 18 wherein the housing has a first length and the torsion bar has a second length greater than the first length such that the torsion bar extends outside of the housing, and wherein the torsion bar includes a first end portion and a second end portion spaced from each other along the longitudinal axis, with the second end portion being affixed to the housing and the first end portion being disposed outside of the housing, a

Assignees

• Gm Global Tech Operations Inc

Inventors

• Luttinen James L
• Pniewski Jeffry

Classifications

• B62D35/007

  Rear spoilers (B62D35/001 takes precedence) · CPC title

• B62D7/228

  acting between the steering gear and the road wheels, e.g. on tie-rod · CPC title

• B60G7/006 Primary

  Attaching arms to sprung or unsprung part of vehicle, characterised by comprising attachment means controlled by an external actuator, e.g. a fluid or electrical motor (B62D7/146 takes precedence) · CPC title

• B60G11/181

  arranged in a plane parallel to the longitudinal axis of the vehicle · CPC title

• B60G3/20

  all arms being rigid · CPC title