Fluid-filled cylindrical vibration-damping device

A fluid-filled cylindrical vibration-damping device comprising:

• an intermediate cylinder member disposed about an outer peripheral side of an inner shaft member, while being linked with the inner shaft member by a main rubber elastic body;
• a pair of pocket portions provided to the main rubber elastic body and situated to either diametrical side of the inner shaft member, while respectively opening onto an outer peripheral face through window portions provided in the intermediate cylinder member;
• an outer cylindrical member affixed externally onto the intermediate cylinder member while covering the pair of pocket portions thereby defining a pair of fluid chambers filled with a non-compressible fluid;
• and
• an orifice member disposed extending in a circumferential direction along an inner peripheral face of the outer cylindrical member to form orifice passages extending in the circumferential direction between the orifice member and the outer cylindrical member, wherein:
• base wall portions of either of the pair of pocket portions are constituted by the main rubber elastic body so as to actively give rise to opposing positive/negative pressure fluctuations in the pair of fluid chambers at times of vibration input across the inner shaft member and the outer cylindrical member in an axis-perpendicular direction;
• the orifice passages includes a low-frequency orifice passage tuned to a low-frequency range and a high-frequency orifice passage tuned to a high-frequency range;
• and
• the high-frequency orifice passage is provided in an aperture section thereof leading to at least one of the pair of fluid chambers with a moveable film adapted to limit fluid flow through the high-frequency orifice passage on the basis of deformation thereof.