Patent ID: 7090311

Claim:
A brake traction control valve, comprising: a valve core having an inlet to allow inside and outside of the valve core to communicate with each other, and a valve seat provided with an orifice therein; a shell having a dome plus cylinder shape, the shell being coupled to the valve core to cover one end of the valve core; an armature placed in the shell to move forward or backward; an exciting coil placed around the shell to cause the armature to move forward or backward; a plunger placed in the valve core to move forward or backward to open or close the orifice of the valve seat while moving forward or backward by an operation of the armature, the plunger consisting of: a first body brought into contact with the armature and provided with a stopper groove on the inside surface thereof; a second body connected to a lower end of the first body to move forward or backward so as to open or close the orifice of the valve seat, the second body having: an upper part provided for being at least partly inserted in the lower end of the first body and having a stopper protrusion provided for cooperating with the stopper groove; and a lower part having a spring support; and a relief spring arranged outside of the first body around a portion of the upper part of the second body, between the lower end of the first body and the spring support of the lower part of the second body, so that the second body is pushed by oil pressure when the oil pressure increases above a predetermined pressure, thereby opening the orifice, and a return spring to return the plunger and the armature to open the orifice of the valve seat.