초록 ▼

The electric brake including a pad clearance adjusting mechanism comprises: ignition switch detecting member for detecting that an ignition key has been switched from its off position to its on position; brake instruction detecting member; a parking brake detecting member; a brake control device; a

The electric brake including a pad clearance adjusting mechanism comprises: ignition switch detecting member for detecting that an ignition key has been switched from its off position to its on position; brake instruction detecting member; a parking brake detecting member; a brake control device; a piston position sensor; and, an electric actuator. In the brake control device, if the ignition switch detecting member detects that the ignition key has been switched from its off position to its on position, then actuates the electric actuator to thereby cause the present electric brake to generate a slight brake torque, the current position of a piston is set as the initial position of the piston, a position to which the piston is moved back from the initial position by an amount corresponding to a previously set pad clearance is set as the adjusted position of the piston, after then, if a brake instruction is issued by operating a brake pedal, then the electric brake can be operated and, if the brake instruction is retracted, then the electric actuator can be driven to thereby move the piston back to the piston adjusted position, thereby being able to obtain a constant pad clearance.

대표청구항 ▼

[ What is claimed is:] [1.] An electric brake including a pad clearance adjusting mechanism, said electric brake comprising:a main body (10);a piston (1a) movable within said main body (10) for pressing a friction pad (1b);ignition switch detecting member (7) for detecting that an ignition key has b

[ What is claimed is:] [1.] An electric brake including a pad clearance adjusting mechanism, said electric brake comprising:a main body (10);a piston (1a) movable within said main body (10) for pressing a friction pad (1b);ignition switch detecting member (7) for detecting that an ignition key has been switched from its off position to its on position;brake instruction detecting member (5) for detecting an operational condition of a brake pedal (3);a parking brake detecting member (6) for detecting an operational condition of a parking brake (4);a piston position sensor (1d) for detecting a position of said piston within said main body (10) of said electric brake (1),an electric actuator (1c) for actuating said piston (1a) within said main body; anda brake control device (2) for automatically adjusting a pad clearance, wherein said brake control devicegenerates a slight brake torque of said electric brake by operating said electric actuator so as to move said piston onto an initial position, when said ignition switch is turned from its off position to its on position,sets a piston adjusted position of said piston by moving back said piston from said initial position by an amount corresponding to a previously set pad clearance, andmoves back said piston to said piston adjusted position when a brake instruction is issued by operating said brake pedal and then said brake instruction is retracted.