| 摘要 |
The present invention relates to an electronic control brake system. The present invention is directed to an electronic control brake system in which an oil pressure created in a master cylinder (1) is transferred to a wheel brake to apply a braking force thereto in response to the pedal depression or control of an electronic control unit. The electronic control brake system comprises a normal open solenoid valve (30) for selectively switching on or off the oil pressure created in the master cylinder (1), and a piezoelectric actuator (40) for regulating a magnitude of the oil pressure applied to the wheel brake through the solenoid valve (30). Thus, the electronic control brake system of the present invention can have a simplified structure enough to be easily manufactured, have a compact shape and perform the creation/removal of oil pressure in the wheel brake and the resultant precise braking force control only by adjusting the amount of electricity to be supplied thereto. Therefore, since a variety of functions ABS, TCS, ESP, EHB and EPB in which a precise braking control is required can be performed without additional components, there is an advantage in that the present invention has excellent applicability.
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