Patent ID: 7987950

Claim:
A single motor electro wedge brake system that uses a solenoid of a solenoid mechanism to implement additional functions, the single motor electro wedge brake system comprising: an electric pedal that is operated by a driver to brake a vehicle; an ECU that generates control signals by using information measured in the vehicle during braking of the vehicle; a plurality of wedge actuator assemblies, wherein each wedge actuator assembly comprises: a wedge caliper including inner and outer pad assemblies that cover a disk rotating together with a wheel and provided on opposing sides of the disk to press on the disk, and a torque member for performing an interlocking operation so that the outer pad assembly provided on the opposite side to the inner pad assembly is also moved toward the disk when the inner pad assembly is moved toward the disk; each wedge actuator assembly converting a torque, which is generated by a motor driven in normal and reverse directions by the ECU, into an axial motion to move the inner pad assembly toward the disk, thereby generating a self-energizing braking force by using a force applied to the disk caused by a movement of a wedge roller, and implementing a function for maintaining a set clearance between the inner and outer pad assemblies and the disk, and a Fail-Safe function, by using the forward movement of a push rod shaft screwed using a NSL (Non-Self Locking) type screw that is restrained or released on the basis of ON/OFF control of the solenoid mechanism interlocked with the motor controlled by the ECU; and a corresponding housing that receives a corresponding wedge actuator assembly and is fixed to the side of a corresponding wedge caliper, wherein an auxiliary power supply circuit comprises an auxiliary battery in the ECU, the motor of the corresponding wedge actuator assembly, and the solenoid.