PRESSURE DAMPING DEVICE FOR BRAKE SYSTEM

摘要

Disclosed herein is a pressure damping device for a brake system which may reduce pressure pulsations generated by a piston pump. The pressure damping device is installed at a brake system having a hydraulic block provided with a first hydraulic circuit to control transfer of fluid pressures generated at a first port of a master cylinder and discharged from a first pump, and a second hydraulic circuit to control transfer of fluid pressures generated by a second port of the master cylinder and discharged from a second pump. The hydraulic block is provided with a bore connecting the master cylinder with a discharge outlet of each of the pumps and formed between main oil channels. The pressure damping device is provided in the bore, has a changeable volume, and includes a stopper member and a damping member. The damping member includes a ring-shaped elastic member and a plate.

主权项

1. A pressure damping device for a brake system having a hydraulic block provided with a first hydraulic circuit to control transfer of a fluid pressure generated at a first port of a master cylinder and a fluid pressure discharged from a first pump to at least one first wheel, and a second hydraulic circuit to control transfer of a fluid pressure generated by a second port of the master cylinder and a fluid pressure discharged from a second pump to at least one second wheel, the pressure damping device being installed at the brake system,
wherein the hydraulic block is provided with a bore connecting the master cylinder with a discharge outlet of each of the first and second pumps and formed between first and second main oil channels having an orifice to communicate with each of the first and second main oil channels, and the pressure damping device is provided in the bore and has a volume changed according to the fluid pressures discharged from the first and second pumps, the pressure damping device comprising: a stopper member provided therein with a oil passage to connect the first main oil channel with the second main oil channel, the stopper member being coupled to the bore; and a damping member provided between an inner cross section of the bore having an oil passage and a cross section of the stopper member having the oil passage to shut the first and second main oil channels such that the first and second main oil channels are not connected to each other, wherein the damping member comprises a ring-shaped elastic member and a plate coupled to the elastic member such that a center of the elastic member is closed.