Braking device for vehicle

A braking device for a vehicle comprising:

• a master cylinder that converts a required braking force to a fluid pressure, a wheel cylinder that applies, to a wheel of a vehicle, a braking force corresponding to an input fluid pressure;
• a differential pressure valve arranged between the master cylinder and the wheel cylinder to adjust a differential pressure between the master cylinder and the wheel cylinder;
• a holding valve arranged between the differential pressure valve and the wheel cylinder to adjust a communicating state of the differential pressure valve and the wheel cylinder, a reservoir that stores braking fluid
• a pressure reduction valve arranged between the wheel cylinder and the reservoir to adjust a communicating state of the wheel cylinder and the reservoir;
• an electric pump that ejects the braking fluid in the reservoir to a portion between the differential pressure valve and the holding valve;
• and
• a fluid path connected to the reservoir from a master cylinder side of the differential pressure valve,
• the braking device for the vehicle carrying out a control of the differential pressure valve, the holding valve, the pressure reduction valve, and the electric pump,
• the braking device for the vehicle comprising:
• a determining unit that determines execution of a state transition from a pressure increase mode of activating the electric pump with the differential pressure valve in a closed state and the holding valve in an open state to a pressure reduction mode of activating the electric pump with the holding valve in the closed state and the pressure reduction valve in the open state;
• and
• a control unit that carries out the control of any one or more of the differential pressure valve, the holding valve, the pressure reduction valve, and the electric pump as a result of the determination of the execution of the state transition by the determining unit, and reduces an amount of braking fluid to be accumulated in a path between the differential pressure valve and the holding valve.