ELECTRONICALLY CONTROLLABLE BRAKE BOOSTER

1 . An electronically controlled brake booster comprising a brake pedal sensor to detect a stroke of a brake pedal, a motor to transmit power required to generate a braking pressure, a cylinder pressure sensor to detect an internal pressure of a cylinder generated via the motor, and an electronic control unit which controls driving of the motor and which includes a target pressure setting element to set a target pressure using the detected brake pedal stroke information and a proportional-integral controller to perform proportional-integral compensation of an error between the target pressure and the pressure of the cylinder,

wherein the electronic control unit further includes a proportional-integral gain adjustor to adjust at least one of a proportional gain and an integral gain of the proportional-integral controller using the cylinder pressure information detected via the cylinder pressure sensor.

2 . The booster according to claim 1 , wherein the cylinder pressure sensor is mounted to the cylinder and feeds back the detected cylinder pressure information to the electronic control unit.

3 . The booster according to claim 1 , wherein the proportional-integral controller includes:

a proportional element to generate the proportional gain for implementation of proportional control;

an integral element to generate the integral gain for implementation of integral control; and

an adder to add an output signal of the proportional element to an output signal of the integral element.

4 . The booster according to claim 3 , wherein the electronic control unit further includes a control signal generator to generate a motor control signal using a proportional-integral signal received from the adder.

5 . The booster according to claim 4 , further comprising a motor drive unit to control driving of the motor based on the motor control signal received from the electronic control unit.