| 摘要 |
PURPOSE:To provide excellent heat resistance, and to be scarcely affected by heat even if brake oil becomes a high temperature by molding a rod as a drive source for regulating the volume of a volume regulating member of a supermagnetostrictive material. CONSTITUTION:When wheels start to lock, a wheel speed sensor senses it, an ABS controller conducts a magnetic field regulating coil 11 of a volume regulating member 9 and varies a conducting amount, thereby regulating the intensity of a magnetic field to be applied to a supermagnetostrictive rod 10. Thus, brake oil flowing volume in a cylinder chamber 3 is increased, an inner pressure in the chamber 3 is reduced, pressing forces for pressing frictional pads 6, 7 to both sides 2A, 2B of a disc 2 are reduced to reduce a braking force, thereby eliminating locking of the wheels. If the rotating speed of the wheels is increased, conduction of the coil 11 is stopped, the volume of the member 9 is increased to raise the inner pressure in the chamber 3, pressing forces for pressing the pads 6, 7 to both sides 2A, 2B of the disc 2 are increased to increase a braking force. |
