Braking system of an automobile having a variably exhausting pump unit

A braking system of an automobile having a variably exhausting pump unit, the braking system comprising:

• a brake pedal in the vicinity of a driver's seat;
• a master cylinder for generating hydraulic pressure when a force applied to the brake pedal is received;
• a variably exhausting pump unit for performing a pumping operation by the master cylinder, the variably exhausting pump unit comprising a body, an introduction port and an exhaust port defined in the body, a rotation shaft extending through a middle of the body, and a swash plate fixed to the rotation shaft;
• a control section for sensing a traveling state of the automobile and controlling such that a proper braking force is applied to a wheel of the automobile;
• a flow control valve for controlling the hydraulic pressure transferred from the variably exhausting pump unit so as to apply a reverse torque to the variably exhausting pump unit, thereby braking the wheel of the automobile;
• and
• wherein the rotation shaft has a first end connected to a differential gear of the automobile and a second end connected to a driving shaft following a rotation of the wheel, and a plurality of hydraulic cylinders and hydraulic pistons are fixed to an outer surface of the rotation shaft.