ELECTRIC BRAKE APPARATUS AND CONTROL METHOD THEREOF
An electric brake apparatus of the present invention relates to an electronic brake apparatus that includes a pump unit driven based on driving of a motor and a plurality of wheel cylinders each of which receives a fluid pressure generated by the pump unit. The electric brake apparatus includes: a hydraulic circuit disposed between the pump unit and the wheel cylinders; a plurality of wheel valves that regulate a fluid flow between the hydraulic circuit and the wheel cylinders; and an electronic control unit that controls the wheel valves and the motor, wherein the electronic control unit controls the wheel valves and the motor on the basis of an input of a driver's pedaling of a brake pedal and a need for electronic stability control.
1 . An electric brake apparatus that includes a pump unit driven based on driving of a motor and a plurality of wheel cylinders, each of which receives a fluid pressure generated by the pump unit, the electric brake apparatus comprising:
a hydraulic circuit disposed between the pump unit and the wheel cylinders;
a plurality of wheel valves that regulate a fluid flow between the hydraulic circuit and the wheel cylinders; and
an electronic control unit that controls the wheel valves and the motor,
wherein the electronic control unit controls the wheel valves and the motor on the basis of an input of a driver stepping on a brake pedal and a need for electronic stability control.
2 . The electric brake apparatus of claim 1 , wherein the electronic control unit includes:
a braking determination device that determines a driver's braking intent on the basis of an output value of a stroke sensor that detects the driver's pedal operation;
an electronic stability control device that determines a need for the electric stability control of a vehicle on the basis of an output of at least one sensor installed in the vehicle;
a motor controller that controls the motor on the basis of an output of at least one of the braking determination device and the electronic stability control device; and
a wheel valve controller that controls the wheel valves on the basis of an output of at least one of the braking determination device and the electronic stability control device.
3 . The electric brake apparatus of claim 1 , wherein:
the hydraulic circuit includes a first hydraulic circuit that connects the pump unit to some of the wheel cylinders and a second hydraulic circuit that connects the pump unit to the other wheel cylinders; and
the electronic control unit controls to open the wheel valves of the wheel cylinders connected to the second hydraulic circuit when an input of a driver stepping on a brake pedal is detected while supplying a fluid to the wheel cylinders connected to the first hydraulic circuit for the electronic stability control of the vehicle.
4 . The electric brake apparatus of claim 1 , wherein:
the hydraulic circuit includes a first hydraulic circuit that connects the pump unit to some of the wheel cylinders and a second hydraulic circuit that connects the pump unit to the other wheel cylinders; and
the electronic control unit controls to open the wheel valves of the wheel cylinders connected to the second hydraulic circuit when electronic stability control is needed while supplying a fluid to the wheel cylinders connected to the first hydraulic circuit to brake a vehicle when an input of a driver stepping on a brake pedal is detected.
5 . A control method of an electric brake apparatus that includes a pump unit driven based on driving of a motor and a plurality of wheel cylinders, each of which receives a fluid pressure generated by the pump unit, the control method comprising:
detecting one of an input of a user braking and a need for electronic stability control of a vehicle;
driving the motor and discharging a fluid into a hydraulic circuit disposed between the pump unit and the wheel cylinders by an electronic control unit;
controlling a plurality of wheel valves disposed between the hydraulic circuit and the wheel cylinders by the electronic control unit; and
generating braking power for one of a plurality of wheels on the basis of the controlling of the plurality of wheel valves.
6 . The control method of claim 5 , wherein:
the hydraulic circuit includes a first hydraulic circuit that connects the pump unit to some of the wheel cylinders and a second hydraulic circuit that connects the pump unit to the other wheel cylinders; and
the electronic control unit controls to open the wheel valves of the wheel cylinders connected to the second hydraulic circuit when an input of a driver stepping on a brake pedal is detected while supplying a fluid to the wheel cylinders connected to the first hydraulic circuit for the electronic stability control of the vehicle.
7 . The control method of claim 5 , wherein:
the hydraulic circuit includes a first hydraulic circuit that connects between the pump unit and some of the wheel cylinders and a second hydraulic circuit that connects between the pump unit and the other wheel cylinders; and
the electronic control unit controls to open the wheel valves of the wheel cylinders connected to the second hydraulic circuit when electronic stability control is needed while supplying a fluid to the wheel cylinders connected to the first hydraulic circuit to brake a vehicle when an input of a driver stepping on a brake pedal is detected.
8 . The control method of claim 5 , wherein the detecting of the input of braking includes detecting a driver's braking intent by a stroke sensor that detects a driver's pedal operation.