Brake apparatus for vehicle

Patent metadata

Field	Value
Publication number	US-11027714-B2
Application number	US-201816108162-A
Country	US
Kind code	B2
Filing date	Aug 22, 2018
Priority date	Aug 30, 2017
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

A brake apparatus for a vehicle may including: a cylinder including a supply flow path to supply working fluid of a reservoir and a hydraulic chamber connected to the supply flow path; a piston movably installed in the cylinder, and connected to a brake pedal; an elastic member installed in the hydraulic chamber so as to elastically support the piston; a sealing member installed on the outer surface of the piston so as to be in contact with the inner surface of the hydraulic chamber; and a communication flow path formed on the inner surface of the cylinder along the longitudinal direction of the cylinder, and guiding the working fluid of the hydraulic chamber to the opposite side of the moving direction of the piston, when the piston is moved.

First claim

What is claimed is:

1. A brake apparatus for a vehicle, comprising:
a cylinder comprising a supply flow path configured to supply working fluid of a reservoir and a hydraulic chamber connected to the supply flow path;
a piston movably installed in the cylinder, and connected to a brake pedal;
an elastic member installed in the hydraulic chamber so as to elastically support the piston;
a sealing member installed on the outer surface of the piston so as to be in contact with the inner surface of the hydraulic chamber; and
a communication flow path formed on the inner surface of the cylinder along the longitudinal direction of the cylinder, which guides the working fluid of the hydraulic chamber to the opposite side of the moving direction of the piston, when the piston is moved,
wherein:
the hydraulic chamber comprises:
a first hydraulic chamber accommodating an end portion of the piston, and having the communication flow path formed therein; and
a second hydraulic chamber having an inner diameter less than an inner diameter of the first hydraulic chamber, and connected to the supply flow path;

the sealing member has a larger size than the inner diameter of the first hydraulic chamber and the outer diameter of a division ring of the piston;
the sealing member divides the first hydraulic chamber into a first space and a second space when the piston is moved; and
the working fluid of the first hydraulic chamber flows to the first and second spaces through the communication flow path when the piston is pressurized and depressurized.

2. The brake apparatus of claim 1 , wherein, when the piston is pressurized by the brake pedal, the first space in the first hydraulic chamber is gradually decreased and the second space in the first hydraulic chamber is gradually increased.

3. The brake apparatus of claim 1 , wherein:
the piston comprises the division ring protruded from the end portion thereof; and
the sealing member is installed on the division ring.

4. The brake apparatus of claim 1 , wherein:
a first sealing cup is installed on the inner surface of the second hydraulic chamber between the supply flow path and the first hydraulic chamber;
the piston has a piston chamber that communicates with the first hydraulic chamber; and
the piston chamber has a cut-off hole that communicates with the supply flow path.

5. The brake apparatus of claim 4 , wherein the cut-off hole is formed in plurality along the circumferential direction of the piston chamber.

6. The brake apparatus of claim 4 , wherein the cut-off hole is configured to cause the working fluid of the piston chamber to flow toward the supply flow path in a section between the first sealing cup and the supply flow path.

7. The brake apparatus of claim 6 , further comprising a second sealing cup installed on the inner surface of the second hydraulic chamber at a side opposite that of the first sealing cup based on the supply flow path.

Assignees

• Hyundai Mobis Co Ltd

Inventors

• Kim Jong Sung

Classifications

• G05G5/03

  Means for enhancing the operator's awareness of arrival of the controlling member at a command or datum position; Providing feel, e.g. means for creating a counterforce (arrangements for indicating the position of the controlling member G05G1/015) · CPC title

• B60T11/236

  Piston sealing arrangements · CPC title

• B60T11/232 Primary

  Recuperation valves · CPC title

• B60T11/22 Primary

  characterised by being integral with reservoir · CPC title

• B60T7/06

  Disposition of pedal · CPC title