Brake apparatus for vehicle

A brake system for a vehicle, comprising:

• a fluid storage unit including an oil reservoir and an accumulator;
• a fluid pressing unit including a master cylinder and a pump;
• a plurality of wheel brakes configured to apply a braking force to the vehicle;
• at least one wheel-side 3-way solenoid valve configured to selectively interconnect the fluid storage unit, the fluid pressing unit and the plurality of wheel brakes;
• and
• at least one pressing unit-side 3-way solenoid valve configured to selectively interconnect the master cylinder, an inlet of the pump and the wheel-side 3-way solenoid valve,
• wherein the at least one wheel-side 3-way solenoid valve comprises:
• first, second and third ports;
• an armature to which an electromagnetic force is applied;
• a first body having a first hollow and a portion facing the armature;
• a second body having a second hollow and having a portion facing the first body;
• a plunger having a portion extending into the first hollow of the first body and the second hollow of the second body, having a first end adjoining the armature, and configured to move when the first end is pressed by the armature;
• a first opening/closing flow passage configured to selectively allow a fluid flow between the first port and the second port;
• and
• a second opening/closing flow passage configured to selectively allow a fluid flow between the second port and the third port,
• wherein the first port is connected to the fluid storage unit, the second port is connected to one of the wheel brakes, and the third port is connected to an outlet of the fluid pressing unit,
• wherein the first opening/closing flow passage and the second opening/closing flow passage are configured to be opened or closed when a predetermined electromagnetic force is applied to the armature,
• wherein the at least one pressing unit-side 3-way solenoid valve is configured to control a flow path from the master cylinder to the at least one wheel-side 3-way solenoid valve, and to control a flow path from the master cylinder to the inlet of the pump when a predetermined electromagnetic force is applied to the armature.