Electronic hydraulic brake device

摘要

Exemplary embodiments of the present invention relate to an electronic hydraulic brake device, including: a pedal cylinder configured to generate an oil pressure by a pressure of a pedal; a master cylinder configured to generate the oil pressure by sensing the pedal; wheel cylinders configured to be each mounted at a plurality of wheels and provide a braking force to the wheels; a storage configured to store a fluid; a mixing circuit configured to connect the pedal cylinder to some of the wheel cylinders, and communicate with the storage and the master cylinder; a master circuit configured to connect the master cylinder to the wheel cylinder and communicate with the storage; and a hydraulic compartment configured to connect the mixing circuit to the master circuit and limit a movement of the fluid.

主权项

1. An electronic hydraulic brake system, comprising:
a pedal cylinder configured to generate an oil pressure in response to movement of a brake pedal; a master cylinder comprising a first fluid compartment and a second fluid compartment divided by a master piston such that each of the first and second fluid compartments have a volume that varies as the master piston moves within the master cylinder; a piston driving mechanism configured to move the master piston within the master cylinder in a first direction to make the volume of the first fluid compartment smaller; a controller configured to generate control signals for controlling the piston driving mechanism in accordance with movement of the brake pedal; a plurality of wheel cylinders configured to provide a braking force to be applied to wheels, the plurality of wheel cylinders comprising a first wheel cylinder in fluid communication with the first fluid compartment of the master cylinder such that a fluid pressure within the first fluid compartment is transmitted to the first wheel cylinder; and a mixing circuit configured to selectively connect and disconnect between the pedal cylinder and the second fluid compartment of the master cylinder; wherein when the control signals for controlling the piston driving mechanism are available, the mixing circuit disconnects the second fluid compartment from the pedal cylinder, and the first wheel cylinder is driven by the master piston's movement in the first direction with operation of the piston driving mechanism based on the control signals, wherein when the control signals are not available, the mixing circuit connects the pedal cylinder to the second fluid compartment such that the pedal cylinder and the second fluid compartment are in fluid communication, and the oil pressure generated in the pedal cylinder is transmitted to the second fluid compartment to move the master piston in the first direction, whereby the first wheel cylinder is driven by the oil pressure of the pedal cylinder without operation of the piston driving mechanism.