ELECTRONIC BRAKE SYSTEM
First Claim
1. An electronic brake system, which includes a reservoir storing oil, a master cylinder having first and second hydraulic ports and coupled to the reservoir so as to receive the oil, a pedal displacement sensor measuring a displacement of a brake pedal, and a simulation device connected to the master cylinder to provide a reaction force corresponding to a pedal effort of the brake pedal, comprising:
- a hydraulic pressure supply device having a motor configured to be rotated by receiving an electrical signal from the pedal displacement sensor when the brake pedal is operated, a gear pump configured to discharge and suction a hydraulic pressure depending on a rotational force of the motor, and a power transmission unit configured to deliver the rotational force of the motor to the gear pump;
a hydraulic control unit having first and second hydraulic circuits configured to receive the hydraulic pressure by a force generated by the hydraulic pressure supply device to control hydraulic pressure flows delivered to wheel cylinders provided on wheels; and
an electronic control unit configured to control the motor and valves based on hydraulic pressure information and pedal displacement information,wherein the gear pump is connected to the first hydraulic circuit through a first hydraulic passage and to the second hydraulic circuit through a second hydraulic passage connected to a branch passage that is branched off from the first hydraulic passage, andthe electronic brake system further comprising;
a release valve provided on a passage connecting the branch passage with the reservoir and opened to discharge the hydraulic pressure to the reservoir through the first hydraulic passage and the second hydraulic passage, andwherein one end of the gear pump is connected to the reservoir and the other end of the pump is connected to the first hydraulic circuit to provide a common pressure to the first and second hydraulic circuits.
2 Assignments
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Accused Products
Abstract
An electronic brake system may be capable of providing a required hydraulic pressure continuously and constantly as well as a precise pressure control through a gear pump provided in a hydraulic pressure supply device. Also, the electronic brake system may be capable of minimizing a number of valves controlling hydraulic pressure flows to implement a simplified configuration and providing the braking by a pedal effort of a driver even when the brake system is abnormally operated.
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Citations
12 Claims
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1. An electronic brake system, which includes a reservoir storing oil, a master cylinder having first and second hydraulic ports and coupled to the reservoir so as to receive the oil, a pedal displacement sensor measuring a displacement of a brake pedal, and a simulation device connected to the master cylinder to provide a reaction force corresponding to a pedal effort of the brake pedal, comprising:
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a hydraulic pressure supply device having a motor configured to be rotated by receiving an electrical signal from the pedal displacement sensor when the brake pedal is operated, a gear pump configured to discharge and suction a hydraulic pressure depending on a rotational force of the motor, and a power transmission unit configured to deliver the rotational force of the motor to the gear pump; a hydraulic control unit having first and second hydraulic circuits configured to receive the hydraulic pressure by a force generated by the hydraulic pressure supply device to control hydraulic pressure flows delivered to wheel cylinders provided on wheels; and an electronic control unit configured to control the motor and valves based on hydraulic pressure information and pedal displacement information, wherein the gear pump is connected to the first hydraulic circuit through a first hydraulic passage and to the second hydraulic circuit through a second hydraulic passage connected to a branch passage that is branched off from the first hydraulic passage, and the electronic brake system further comprising; a release valve provided on a passage connecting the branch passage with the reservoir and opened to discharge the hydraulic pressure to the reservoir through the first hydraulic passage and the second hydraulic passage, and wherein one end of the gear pump is connected to the reservoir and the other end of the pump is connected to the first hydraulic circuit to provide a common pressure to the first and second hydraulic circuits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification