| 摘要 |
A hydraulic brake system includes: a master cylinder forming a braking hydraulic pressure according to an operation of a brake pedal; wheel brakes provided in front and rear wheels of a vehicle to receive the braking hydraulic pressure of the master cylinder and exert a braking force; a first hydraulic circuit controlling an oil pressure transmission by connecting a first port of the master cylinder and two wheel brakes; a second hydraulic circuit controlling an oil pressure transmission by connecting a second port of the master cylinder and remaining two wheel brakes; a hydraulic block communicating main passages of the first and second hydraulic circuits with each other, the hydraulic block being provided with a communication passage having one side opened, such that the first and second hydraulic circuits pass through the communication passage; a pump mounted on one side of each of the main passages, with reference to the hydraulic block, to discharge oil through the hydraulic block to the wheel brake side or the master cylinder side; an orifice mounted on each of the other side of the main passages, with reference to the hydraulic block; and a damper member including: a piston embedded into the hydraulic block and reciprocating the communication passage, the piston having stepped portions on both ends thereof; a cap sealing the opened side of the communication passage and mounted on the hydraulic block; and a spring mounted on each of the stepped portions to elastically support the piston between the cap and the closed side of the communication passage. Since the pressure pulsation generated by the driving of the pump is attenuated by the damper member, the overall operating noise during the brake control is reduced and the reliability of products is increased. |
