Hydraulic brake system

Patent metadata

Field	Value
Publication number	US-9758142-B2
Application number	US-201514736185-A
Country	US
Kind code	B2
Filing date	Jun 10, 2015
Priority date	Jun 13, 2014
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

Disclosed is a hydraulic brake system provided with a high pressure accumulator that reduces a pressure pulsation of brake oil being discharged through operation of a pump. The high pressure accumulator includes a damping member that is provided in a bore communicating with an inlet port and an outlet port of the high pressure accumulator respectively allowing brake oil to be introduced and discharged therethrough, and is provided with a bypass flow passage connecting the inlet port to the outlet port, and a reinforcing member installed at the damping member to improve durability of the damping member.

First claim

What is claimed is:

1. A hydraulic brake system provided with a high pressure accumulator that reduces a pressure pulsation of brake oil being discharged through operation of a pump, wherein the high pressure accumulator comprises:
a damping member that is provided in a bore communicating with an inlet port and an outlet port of the high pressure accumulator, respectively allowing brake oil to be introduced and discharged therethrough, and is provided with a bypass flow passage fluidly connecting the inlet port to the outlet port independently of brake oil pressure at the inlet port; and
a reinforcing member installed at the damping member to improve durability of the damping member,
wherein the bypass flow passage is formed by at least one groove that is formed in an outer circumferential surface of the damping member to communicate the inlet port with the outlet port, and
wherein at least a portion of the reinforcing member is disposed in a through hole of the damping member.

2. The hydraulic brake system of claim 1 , wherein the at least one groove is a plurality of grooves formed in a lengthwise direction of the damping member while spaced apart from each other.

3. The hydraulic brake system of claim 1 , wherein the damping member has a lower end spaced apart from a bottom surface of the bore.

4. The hydraulic brake system of claim 1 , wherein the reinforcing member comprises:
an insertion part that is inserted into a hollow part formed at the center of the damping member; and
a support part that is bentedly extending from one end of the insertion part and makes contact with one end of the damping member so as to be prevented from being separated from the damping member.

5. The hydraulic brake system of claim 4 , wherein the insertion part comprises a convex portion and a concave portion that are repeatedly formed in a lengthwise direction of the insertion part, so that a subsidiary damping space is formed between the damping member and the concave portion.

6. The hydraulic brake system of claim 1 , further comprising a cap member coupled to the damping member in a press fitting manner to close the bore.

7. The hydraulic brake system of claim 6 , wherein a coupling groove is formed in an inner surface of the cap member, and the damping member has a protrusion part combined with the coupling groove.

8. The hydraulic brake system of claim 1 , wherein the damping member includes rubber so as to be elastically deformable.

9. The hydraulic brake system of claim 1 , wherein the inlet port and the outlet port are disposed opposite to each other with respect to the bore.

10. The hydraulic brake system of claim 1 , wherein the reinforcing member comprises an insertion part that is inserted into a hollow part formed at the center of the damping member, wherein the hollow part includes the through hole extending through the damping member in a lengthwise direction such that an outer circumferential surface of the insertion part is surrounded by an inner circumferential surface of the damping member.

11. The hydraulic brake system of claim 10 , wherein the through hole extends from a first end of the damping member to a second end of the damping member in the lengthwise direction.

Assignees

• Mando Corp

Inventors

• Doh Yoon-Ho

Classifications

• B60T8/4872

  pump-back systems · CPC title

• B60T8/4068 Primary

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

• B60T13/14

  using accumulators or reservoirs {fed by pumps} · CPC title

• B60T13/148 Primary

  Arrangements for pressure supply · CPC title

• B60T13/12 Primary

  the fluid being liquid · CPC title