Pressure variation damper for a hydraulic vehicle brake system, and corresponding vehicle brake system

Patent metadata

Field	Value
Publication number	US-10399547-B2
Application number	US-201515520037-A
Country	US
Kind code	B2
Filing date	Oct 8, 2015
Priority date	Dec 4, 2014
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

A pressure variation damper for a slip-regulated, hydraulic vehicle brake system includes a damper housing and a tubular damper element. The damper element is disposed in the damper housing and configured for elastic deformation. The damper element is subjected on an inside and/or on an outside to a fluid. Possible pressure variations of the fluid are to be damped. The damper element comprises a corrugation on the outside and a corrugation on the inside configured to reduce a change in a wall thickness of the damper element owing to the corrugation on the outside.

First claim

The invention claimed is:

1. A pressure variation damper for a slip-regulated, hydraulic vehicle brake system, comprising:
a damper housing; and
a tubular damper element disposed in the damper housing, configured for elastic deformation, and defining a longitudinal axis,
wherein the damper element is subjected on an inside and/or on an outside to a fluid,
wherein possible pressure variations of the fluid are to be damped,
wherein the damper element comprises a corrugation on the outside and a corrugation on the inside configured to reduce a change in a wall thickness of the damper element owing to the corrugation on the outside,
wherein the corrugation on the outside defines first wave troughs and first wave peaks having a wavelength,
wherein the corrugation on the inside defines second wave troughs and second wave peaks, and
wherein the second wave troughs are offset along the longitudinal axis relative to the first wave peaks by less than half of the wavelength.

2. The pressure variation damper as claimed in claim 1 , wherein the damper element further comprises an open end and a closed end.

3. The pressure variation damper as claimed in claim 1 , wherein the damper element is thick-walled.

4. The pressure variation damper as claimed in claim 1 , wherein the wall thickness is non-uniform.

5. The pressure variation damper as claimed in claim 4 , wherein the wall thickness of the damper element in a region of the first wave peaks on the outside is greater than the wall thickness of the damper element in a region of the first wave troughs on the outside.

6. The pressure variation damper as claimed in claim 1 , wherein the wall thickness is elastically variable.

7. The pressure variation damper as claimed in claim 1 , wherein the damper element is deformation-damping.

8. The pressure variation damper as claimed in claim 1 , wherein the damper element further comprises an elastomer.

9. The pressure variation damper as claimed in claim 1 , wherein
the second wave troughs are aligned with the first wave peaks along the longitudinal axis.

10. The pressure variation damper as claimed in claim 9 , wherein the second wave peaks are aligned with the first wave troughs along the longitudinal axis.

11. A hydraulic vehicle brake system, comprising:
a pressure variation damper including:
a damper housing; and
a tubular damper element disposed in the damper housing, configured for elastic deformation, and defining a longitudinal axis,
wherein the damper element is subjected on an inside and/or on an outside to a fluid,
wherein possible pressure variations of the fluid are to be damped, and
wherein the damper element comprises a corrugation on the outside and a corrugation on the inside configured to reduce a change in a wall thickness of the damper element owing to the corrugation on the outside,
wherein the corrugation on the outside defines first wave troughs and first wave peaks having a wavelength,
wherein the corrugation on the inside defines second wave troughs and second wave peaks, and
wherein the second wave troughs are offset along the longitudinal axis relative to the first wave peaks by less than half of the wavelength.

12. The hydraulic vehicle brake system as claimed in claim 11 , further comprising:
a hydraulic pump.

13. The hydraulic vehicle brake system as claimed in claim 11 , wherein
the second wave troughs are aligned with the first wave peaks along the longitudinal axis.

14. The hydraulic vehicle brake system as claimed in claim 13 , wherein the second wave peaks are aligned with the first wave troughs along the longitudinal axis.

Assignees

• Bosch Gmbh Robert

Inventors

• Gaertner Oliver
• Geilfuss Alexander

Classifications

• B60T17/04

  Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses (traction couplings involving joints for supply lines, electric circuits, or the like B60D1/62; couplings peculiar to railway vehicles for, or combined with, couplings or connectors for fluid conduits or electric cables B61G5/06; pipes, cut-off valves, couplings, air hoses per se F16C, F16K, F16L) · CPC title

• B60T8/4872

  pump-back systems · CPC title

• B60T8/4068 Primary

  the additional fluid circuit comprising means for attenuating pressure pulsations · CPC title

• F16L55/053

  the gas in the reservoir being separated from the fluid in the pipe · CPC title

• B60T17/02 Primary

  Arrangements of pumps or compressors, or control devices therefor · CPC title