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Electric brake system

  • US 10,071,717 B2
  • Filed: 11/18/2016
  • Issued: 09/11/2018
  • Est. Priority Date: 11/19/2015
  • Status: Active Grant
First Claim
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1. An electric brake system comprising:

  • a hydraulic pressure supply device configured to generate hydraulic pressure using a piston which is operated by means of an electrical signal that is output corresponding to a displacement of a brake pedal, and including a first pressure chamber provided at one side of the piston being movably accommodated inside a cylinder block and connected to one or more wheel cylinders, and a second pressure chamber provided at the other side of the piston and connected to the one or more wheel cylinders;

    a first hydraulic flow path configured to communicate with the first pressure chamber and provide hydraulic pressure generated in the first pressure chamber to the one or more wheel cylinders;

    a second hydraulic flow path configured to communicate with the first pressure chamber and provide the hydraulic pressure generated in the first pressure chamber to the one or more wheel cylinders;

    a third hydraulic flow path configured to communicate with the second pressure chamber, branch at the middle of the third hydraulic flow path to be connected to each of the first hydraulic flow path and the second hydraulic flow path, and provide hydraulic pressure generated in the second pressure chamber to the one or more wheel cylinders;

    a sixth hydraulic flow path configured to communicate with the first pressure chamber, branch at the middle of the sixth hydraulic flow path to be connected to each of the first hydraulic flow path and the second hydraulic flow path, and deliver hydraulic pressure of the one or more wheel cylinders to the first pressure chamber;

    a seventh hydraulic flow path configured to connect the sixth hydraulic flow path to the third hydraulic flow path to deliver the hydraulic pressure of the one or more wheel cylinders to the second pressure chamber;

    a first control valve provided at the first hydraulic flow path and configured to control an oil flow;

    a second control valve provided at the second hydraulic flow path and configured to control an oil flow;

    a third control valve provided at the third hydraulic flow path and configured to control an oil flow;

    a seventh control valve provided at the sixth hydraulic flow path and configured to control an oil flow;

    an eighth control valve provided at the seventh hydraulic flow path and configured to control an oil flow;

    a first hydraulic circuit including first and second branching flow paths which branch from the first hydraulic flow path and are connected to two wheel cylinders, respectively, and first and second inlet valves which control the first and second branching flow paths, respectively; and

    a second hydraulic circuit including third and fourth branching flow paths which branch from the second hydraulic flow path and are connected to two wheel cylinders, respectively.

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