The present invention relates to a
piston valve
assembly which is used in a continuous damping control
damper using
magneto-rheological fluid. The
piston valve
assembly is coupled with an end of the
piston rod, and a stopper having a flat upper surface which is surface-contacted with an upper plate is disposed between a core
assembly and the upper plate, thereby properly dispersing a force applied to the
piston rod.According to the present invention, the reliability and stability in the
coupling between the
piston rod and the piston valve assembly can be increased, thereby stably controlling the damping force of the
damper. Further, the slot is formed in the core of the piston valve assembly so as to reduce the damping force in the lower speed range, thereby considerably improving the driving comport of a vehicle.