Patent attributes
An electronic brake system is disclosed. The electronic brake system includes: a hydraulic pressure supply apparatus having a piston operated by an electrical signal corresponding to a displacement of a brake pedal and first and second pressure chambers provided at one side of the piston to be connected to one or more wheel cylinders so as to generate a hydraulic pressure; a first hydraulic passage communicating with the first pressure chamber; second and third hydraulic passages branched from the first hydraulic passage; a fourth hydraulic passage communicating with the second pressure chamber; a fifth hydraulic passage branched from the fourth hydraulic passage to join with the second hydraulic passage; a sixth hydraulic passage branched from the fourth hydraulic passage to join with the third hydraulic passage; a first control valve provided on the second hydraulic passage to control the flow of oil; a second control valve provided on the third hydraulic passage to control the flow of oil; a third control valve provided on the fifth hydraulic passage to control the flow of oil; a fourth control valve provided on the sixth hydraulic passage to control the flow of oil; a first hydraulic circuit configured such that the second hydraulic passage or the fifth hydraulic passage is connected to two wheel cylinders, respectively; and a second hydraulic circuit configured such that the third hydraulic passage or the sixth hydraulic passage is connected to two wheel cylinders, respectively, wherein the first control valve to the fourth control valve are provided as check valves.
