Patent ID: 9555789
Date: 2017-01-31
CPC Classifications: B60T

Claim:
1. An electronic brake system including a reservoir in which oil is stored, a master cylinder having a first oil pressure port and a second oil pressure port and coupled with the reservoir to receive the oil, a pedal displacement sensor configured to detect a displacement of a brake pedal, and a simulation device connected to the master cylinder and provided so that reaction is provided according to a pedal effort of the brake pedal, the electronic brake system comprising: a hydraulic pressure supply unit configured to output an electrical signal through the pedal displacement sensor to operate a motor when the brake pedal operates, and configured to convert rotatory power of the motor to rectilinear movement; an oil pressure control unit having a first oil pressure circuit and a second oil pressure circuit connected to the hydraulic pressure supply unit through a main oil pressure path, and each configured to control two wheels so that a hydraulic pressure is received using a force generated by the hydraulic pressure supply unit to perform braking; and an electronic control unit configured to control the motor and valves based on hydraulic pressure information and pedal displacement information, wherein the oil pressure control unit includes: a first inlet valve and a second inlet valve respectively disposed at upper streams of two wheel cylinders to control the two wheels provided in the first oil pressure circuit; a third inlet valve and a fourth inlet valve respectively disposed at upper streams of two wheel cylinders to control the two wheels provided in the second oil pressure circuit; a first balance valve configured to connect or disconnect the two wheel cylinders to which the first inlet valve and the second inlet valve are connected; a second balance valve configured to connect or disconnect the two wheel cylinders to which the third inlet valve and the fourth inlet valve are connected; a first dump valve connected to any one wheel cylinder among the two wheel cylinders provided in the first oil pressure circuit and configured to control a flow of oil discharged from the connected wheel cylinder; and a second dump valve connected to any one wheel cylinder among the two wheel cylinders provided in the second oil pressure circuit and configured to control a flow of oil discharged from the connected wheel cylinder.