Electric brake including a pad clearance adjusting mechanism and

Details Electric brake including a pad clearance adjusting mechanism and Electric brake including a pad clearance adjusting mechanism and

1997-12-24

1999-09-28

Butler, Douglas C.

Brakes

Wheel

Axially movable brake element or housing therefor

188 111L, 188181T, 188 718, 188158, 188196R, 188162, 303 20, 303112, 303155, 303 3, B60T 1374, B60T 1358

Patent

active

059572469

ABSTRACT:
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.

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