Electric brake system and method for controlling the same
First Claim
1. An electric brake system comprising:
- a master cylinder configured to generate hydraulic pressure corresponding to a displacement of a brake pedal;
a hydraulic circuit configured to transfer the hydraulic pressure generated by the master cylinder to at least one wheel;
an actuator connected to a passage connecting between the master cylinder and the hydraulic circuit and configured to generate hydraulic pressure using a piston operated by an electric signal generated in response to the displacement of the brake pedal, the actuator comprising a motor configured to drive the piston;
a sensing unit configured to sense driver'"'"'s braking intention; and
a controller configured to calculate a change amount of stroke of the piston of the actuator, connected to a passage connecting between the master cylinder and the hydraulic circuit, needed to output brake pressure corresponding to the driver'"'"'s braking intention, and control the motor of the actuator to change a torque generated by the motor of the actuator in response to the calculated change amount of the stroke of the piston of the actuator so as to boost pressure of each wheel at a predetermined slope so that the torque generated by the motor of the actuator reduces the difference between the brake pressure corresponding to the driver'"'"'s braking intention and the pressure of each wheel.
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Accused Products
Abstract
An electric brake system and a method for controlling the same are disclosed. The electric brake system includes a hydraulic control device, a sensing unit, and a controller. The hydraulic control device generates hydraulic pressure using a piston operated by an electric signal generated in response to a displacement of a brake pedal. The sensing unit detects driver'"'"'s braking intention. When an electronic stability control (ESC) of a vehicle operates, the controller calculates a change amount of stroke of the piston needed to output brake pressure corresponding to the driver'"'"'s braking intention, and acquires the calculated stroke change amount so as to boost pressure of each wheel at a predetermined slope.
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Citations
20 Claims
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1. An electric brake system comprising:
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a master cylinder configured to generate hydraulic pressure corresponding to a displacement of a brake pedal; a hydraulic circuit configured to transfer the hydraulic pressure generated by the master cylinder to at least one wheel; an actuator connected to a passage connecting between the master cylinder and the hydraulic circuit and configured to generate hydraulic pressure using a piston operated by an electric signal generated in response to the displacement of the brake pedal, the actuator comprising a motor configured to drive the piston; a sensing unit configured to sense driver'"'"'s braking intention; and a controller configured to calculate a change amount of stroke of the piston of the actuator, connected to a passage connecting between the master cylinder and the hydraulic circuit, needed to output brake pressure corresponding to the driver'"'"'s braking intention, and control the motor of the actuator to change a torque generated by the motor of the actuator in response to the calculated change amount of the stroke of the piston of the actuator so as to boost pressure of each wheel at a predetermined slope so that the torque generated by the motor of the actuator reduces the difference between the brake pressure corresponding to the driver'"'"'s braking intention and the pressure of each wheel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for controlling an electric brake system that includes a master cylinder configured to generate hydraulic pressure corresponding to a displacement of a brake pedal, a hydraulic circuit configured to transfer the hydraulic pressure generated by the master cylinder to at least one wheel, an actuator generating hydraulic pressure using a piston operated by a motor in response to an electric signal generated in response to the displacement of the brake pedal, the method comprising:
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sensing driver'"'"'s braking intention; and when an electronic stability control (ESC) of a vehicle operates, calculating a change amount of stroke of the piston of the actuator, connected to a passage connecting between the master cylinder and the hydraulic circuit, needed to output brake pressure corresponding to the driver'"'"'s braking intention, and controlling the motor of the actuator to change a torque generated by the motor of the actuator in response to the calculated change amount of the stroke of the piston of the actuator so as to boost pressure of each wheel at a predetermined slope so that the torque generated by the motor of the actuator reduces difference between the brake pressure corresponding to the driver'"'"'s braking intention and the pressure of each wheel. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification