Patent ID: 8100388

Claim:
An electromagnetic active engine mount apparatus comprising: a main rubber, into which a center bolt is inserted and coupled; a main pipe, one end of which is coupled to the main rubber; a diaphragm coupled to the other end of the main pipe; a damping chamber defined by coupling of the main rubber, main pipe and diaphragm so as to be air-tightly filled therein with a working fluid; and an orifice section and a vibrating member mounted in the damping chamber, the vibrating member being operated by an electromagnetic drive so as to generate vibration to reduce vibration of an engine; wherein the damping chamber is partitioned into an upper liquid chamber and a lower liquid chamber by the orifice section and vibrating member; wherein the lower liquid chamber is partitioned into first and second auxiliary liquid chambers by the electromagnetic drive, the first auxiliary liquid chamber being formed by the vibrating member and the electromagnetic drive and the second auxiliary liquid chamber being formed by the electromagnetic drive and the diaphragm; wherein the electromagnetic drive includes a sub-channel passing along a central portion thereof such that the first and second auxiliary chambers communicate with each other; wherein the electromagnetic drive includes a solenoid section generating an electromagnetic force, and an armature coupled with the vibrating member on one side thereof such that the vibrating member generates the vibration, and moving up and down by means of the electromagnetic force of the solenoid section; wherein the sub-channel vertically passes along the central portions of the solenoid section and armature; wherein the solenoid section includes a coil wound in a ring shape, a yoke enclosing the coil, a core to and from which the armature is repeatedly attached and detached by the electromagnetic force, and a case enclosing the yoke and core; wherein the sub-channel passes through central portions of the core and case; and wherein the case includes a sealing member in order to prevent the working fluid from flowing from the sub-channel to the yoke through a gap occurring when the armature is detached from the core.