Orifice plate for engine mount filled with magnetorheological fluid

Abstract

The invention provides an orifice plate apparatus for an engine mount filled with magnetorheological (MR) fluid which may include a coil assembly having a coil wound thereon and being annular in shape, a core assembly unit housing the coil assembly, formed in a discoid shape, and defining a flow path of which an upper passage may be disposed in a top surface of the core assembly unit, and a lower passage may be disposed in a bottom surface of the core assembly unit, wherein the flow path may be formed annularly along a perimeter of the coil assembly, and a flow path separator installed between the upper passage and the lower passage, such that only a unidirectional circulation may be enabled for the magnetorheological MR fluid passing through the flow path.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2011-0076418 filed on Aug. 1, 2011, the entire contents of which are hereby incorporated by reference for all purposes. technical field [0003] The present invention relates to an orifice plate installed inside the base of a hydraulic engine using a magneto-rheological (MR) fluid, and more particularly to an orifice plate formed such that the magnetic field interacts with the flow path through which the MR fluid passes. The flow direction of the MR fluid on all areas of the flow) is aligned vertically and such that the flow paths only allow unidirectional flow along the perimeter of the coil pack inside and outside of the coil pack, respectively. Background technique [0004] In order to suppress engine vibration, an engine of a vehicle is installed in an engine room of a vehicle body through an engine mount. Commonly used engine mounts are rubber...

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Problems solved by technology

[0013] However, in the related art method, although the magnetic field is aligned perpendicular to the flow direction of the MR fluid in the region "A" and the region "C" in the structure in which the coil is arranged at a certain distance from the side of the flow path, in the region "A" The magnetic field in B" is formed in a direction parallel (to the flow direction of the MR fluid) and does not pass through the MR fluid, which therefore reduces the control efficiency

[0014] Although the reduced control efficiency can be recovered by increasing the value of current applied to the coil or by creating a longer flow path, this involves a limitation of size increase (which increases the heat generated)

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