SOLENOID ACTUATED HYDRAULIC VALVE FOR USE IN AN AUTOMATIC TRANSMISSION

摘要

A hydraulic valve assembly (10) including a valve body (12) having a valve bore (16) and valve member (18) movably supported in the valve body (12) to control hydraulic pressure. The hydraulic valve assembly also includes a solenoid assembly (14) including a solenoid coil (56) supported in a housing (54). An armature (66) is operatively connected to the valve member (18) and a pole piece (68) is fixedly supported in the housing (54). The pole piece (68) has a castellated shunt portion (70) that faces the armature (66). The armature (66) is movable toward the pole piece (68) under the influence of an electromagnetic flux generated by current flowing through the solenoid coil (56) thereby controlling the valve body.