Spring damper apparatus for a vehicle, in particular for a motor vehicle, and vehicle having at least one such spring damper apparatus

Patent metadata

Field	Value
Publication number	US-11833877-B2
Application number	US-202017563131-A
Country	US
Kind code	B2
Filing date	Jun 4, 2020
Priority date	Aug 1, 2019
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

A spring damper apparatus for a vehicle, with a hydropneumatic system, via which a wheel of the vehicle can be braced spring-mounted and damped on a body of the vehicle. The hydropneumatic system includes a first chamber delimited at least partially by a partition element, in which a fluid acting on the partition element is accommodated. In addition, the hydropneumatic system includes a second chamber separated from the first chamber by the partition element and delimited by the partition element, in which a gas forming a gas spring and acting on the partition element is accommodated. In addition, the hydropneumatic system includes a housing in which the fluid is accommodated. In addition, the hydropneumatic system includes a piston shiftably accommodated in the housing and acting on the fluid, via which piston the wheel can be braced on the body.

First claim

The invention claimed is:

1. A spring damper apparatus for a vehicle, with a hydropneumatic system, via which at least one wheel of the vehicle can be braced spring-mounted and damped on a body of the vehicle, wherein the hydropneumatic system comprises:
a first chamber delimited at least partially by a partition element, in which a fluid acting on the partition element is accommodated,
a second chamber separated from the first chamber by the partition element and at least partially delimited by the partition element, in which a gas forming a gas spring and acting on the partition element is accommodated,
a housing in which the fluid is accommodated,
and
a piston shiftably accommodated in the housing and acting on the fluid accommodated in the housing, via which piston the wheel is braced on the body, wherein, by the piston, by shifting of the piston relative to the housing, a pressure is exerted on the fluid accommodated in the housing and in the first chamber, and thereby, via the fluid, the partition element is at least partially moved, whereby a volume reduction of the second chamber and thereby a compression of the gas in the second chamber is brought about,

wherein
at least one sliding element is provided in addition to the piston and in addition to the partition element and shiftable relative to the housing,
a height adjustment of the body is performed by a shifting of the sliding element relative to the housing,
the shifting of the sliding element relative to the housing is performed by an actuator, and
by the shifting of the sliding element relative to the housing:
at least a portion of the fluid is conveyed out of the housing and additional fluid is conveyed into the housing, or
a fluid column which is formed by the fluid accommodated in the housing and which is accommodated in the housing is shifted within the housing relative to the housing.

2. The spring damper apparatus according to claim 1 , wherein the hydropneumatic system is designed as a partially or fully supporting hydropneumatic system, the gas spring of which at least partially receives a load of the vehicle, whereby the gas spring is preloaded.

3. The spring damper apparatus according to claim 2 , wherein a mechanical spring which receives the load as a second portion, whereby the mechanical spring is preloaded, is associated with the hydropneumatic system designed as partially supporting hydropneumatic system, the gas spring of which receives the load as a first portion.

4. The spring damper apparatus according to claim 3 , wherein a reservoir chamber provided in addition to the first chamber and in addition to the second chamber and arranged outside of the housing, which is partially delimited by a reservoir housing provided in addition to the housing and which is partially delimited by the sliding element which is shiftable relative to the reservoir housing, by which, for the height adjustment of the body, by shifting of the sliding element relative to the housing and relative to the reservoir housing, at least the portion of the fluid can be conveyed out of the housing and into the reservoir chamber, and the additional fluid can be conveyed out of the reservoir chamber and into the housing.

5. The spring damper apparatus according to claim 3 , wherein the sliding element is arranged in the housing, in particular opposite the piston, so that, for the height adjustment of the body, by the sliding element, by shifting of the sliding element relative to the housing, the fluid column accommodated in the housing can be shifted relative to the housing.

6. The spring damper apparatus according to claim 2 , wherein a reservoir chamber provided in addition to the first chamber and in addition to the second chamber and arranged outside of the housing, which is partially delimited by a reservoir housing provided in addition to the housing and which is partially delimited by the sliding element which is shiftable relative to the reservoir housing, by which, for the height adjustment of the body, by shifting of the sliding element relative to the housing and relative to the reservoir housing, at least the portion of the fluid can be conveyed out of the housing and into the reservoir chamber, and the additional fluid can be conveyed out of the reservoir chamber and into the housing.

7. The spring damper apparatus according to claim 2 , wherein the sliding element is arranged in the housing, in particular opposite the piston, so that, for the height adjustment of the body, by the sliding element, by shifting of the sliding element relative to the housing, the fluid column accommodated in the housing can be shifted relative to the housing.

8. The spring damper apparatus according to claim 1 , wherein a reservoir chamber provided in addition to the first chamber and in addition to the second chamber and arranged outside of the housing, which is partially delimited by a reservoir housing provided in addition to the housing and which is partially delimited by the sliding element which is shiftable relative to the reservoir housing, by which, for the height adjustment of the body, by shifting of the sliding element relative to the housing and relative to the reservoir housing, at least the portion of the fluid can be conveyed out of the housing and into the reservoir chamber, and the additional fluid can be conveyed out of the reservoir chamber and into the housing.

9. The spring damper apparatus according to claim 8 , wherein the reservoir housing is immobile relative to the housing.

10. The spring damper apparatus according to claim 9 , wherein the reservoir housing is indirectly or directly secured on the housing and thereby immobile relative to the housing.

11. The spring damper apparatus according to claim 10 , wherein the reservoir housing is immobile relative to the body.

12. The spring damper apparatus according to claim 11 , wherein the reservoir housing is indirectly or directly secured on the body and thereby immobile relative to the body.

13. The spring damper apparatus according to claim 9 , wherein the reservoir housing is immobile relative to the body.

14. The spring damper apparatus according to claim 13 , wherein the reservoir housing is indirectly or directly secured on the body and thereby immobile relative to the body.

15. The spring damper apparatus according to claim 8 , wherein the reservoir housing is immobile relative to the body.

16. The spring damper apparatus according to claim 15 , wherein the reservoir housing is indirectly or directly secured on the body and thereby immobile relative to the body.

17. The spring damper apparatus according to claim 1 , wherein the sliding element is arranged in the housing, so that, for the height adjustment of the body, by the sliding element, by shifting of the sliding element relative to the housing, the fluid column accommodated in the housing can be shifted relative to the housing.

18. The spring damper apparatus according to claim 1 , wherein the actuator is a self-locking threaded spindle.

19. The spring damper apparatus according to claim 1 , wherein the shifting of the sliding element relative to the housing is performed by the actuator via a piston rod coupled to the sliding element.

20. A vehicle with a body, with at least one wheel, and with at least one spring damper apparatus which comprises a hydropneumatic system, via which the wheel is braced spring-mounted and damped on the body, wherein the hydropneumatic system comprises:
a first chamber delimited at least partially by a partiti

Assignees

• Audi Ag

Inventors

• Schmidt Walter
• Gradl Michael

Classifications

• B60G17/08 Primary

  Characteristics of fluid dampers (adjusting fluid dampers in general F16F9/44 - F16F9/53) · CPC title

• B60G15/062

  the spring being arranged around the damper (B60G15/061, B60G15/067, B60G15/07 take precedence) · CPC title

• B60G2202/312

  The spring being a wound spring · CPC title

• B60G2204/40

  Auxiliary suspension parts; Adjustment of suspensions · CPC title

• B60G2206/41

  Dampers · CPC title