# US 2014/0197585 A1 · Hydraulically damped drive train mounts > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197585 A1 - Document ID: US20140197585A1 - Status: Published application - Kind: A1 - Application number: 13/261,778 - Filed: 2011-05-18 - Published: 2014-07-17 - Earliest claimed: 2011-05-18 - Assignees: Hydac Electronic GmbH - Inventors: Michael Casimir; Benjamin Röder - Web page: https://patentgrep.com/patent/US20140197585A1 ## CPC - F16F 13/08: the plastics spring forming at least a part of the wall of the fluid chamber of the damper (F16F13/20 - F16F13/24 take precedence) - F16F 13/10: the wall being at least in part formed by a flexible membrane or the like (F16F13/14 - F16F13/18 take precedence) - F16F 13/26: characterised by adjusting or regulating devices responsive to exterior conditions {(F16F13/101 takes precedence)} - F16F 13/268: {comprising means for acting dynamically on the walls bounding an equilibration chamber (F16F13/264 take precedence)} - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION ## Abstract The invention relates to a hydraulically damped drive train mount (1), in particular for a motor vehicle, comprising a mount housing (2) in which an elastic mount body (3) is arranged in a partially movable manner, the elastic mount body at least partially enclosing a first fluid chamber (4), and comprising a fluid-filled equalization chamber (6) sealed by a sealing element (5) that can be moved in the mount housing (2), wherein a membrane (7) arranged in the mount housing (2) separates the first fluid chamber (4) from the equalization chamber (6). The invention is characterized in that the pressure in the equalization chamber (6) can be adjusted by means of the sealing element (5) that is formed as an axially movable piston (8). ## Claims ### Claim 1 A hydraulically damped drive train mount (1), in particular for a motor vehicle having a mount housing (2), in which an elastic mount body (3) is disposed such that it is partially displaceable, the elastic mount body at least partially enclosing a first fluid chamber (4), having a fluid-filled equalization chamber (6), which is sealed by a sealing element (5) that can be displaced in the mount housing (2), wherein a membrane (7) disposed in the mount housing (2) separates the first fluid chamber (4) from the equalization chamber (6), characterized in that the pressure in the equalization chamber (6) can be adjusted by means of the sealing element (5), which is formed as an axially displaceable piston (8). ### Claim 2 (depends on 1) The drive train mount according to claim 1, characterized in that the membrane (7) is provided with an annular bead (9). ### Claim 3 (depends on 1, 2) The drive train mount according to claim 1 or 2, characterized in that the sealing element (5), disposed in the mount housing (2) as a piston (8) such that it is axially displaceable, is pressurized by a pressurized fluid or gaseous medium (10). ### Claim 4 (depends on 3) The drive train mount according to claim 3, characterized in that the fluid or gaseous medium (10) is enclosed in a second fluid chamber (11) in the mount housing (2), which lies opposite the equalization chamber (6) with respect to the sealing element (5). ### Claim 5 (depends on 1, 2, 3, 4) The drive train mount according to one of the claims 1 to 4, characterized in that the first fluid chamber (4) is filled with a mixture of water and glycol. ### Claim 6 (depends on 1, 2, 3, 4, 5) The drive train mount according to one of the claims 1 to 5, characterized in that the equalization chamber (6) is filled with a low-viscosity hydraulic oil. ### Claim 7 (depends on 4, 5, 6) The drive train mount according to one of the claims 4 to 6, characterized in that the fluid or gaseous medium (10) in the equalization chamber (6) is preloaded by a pressure transmitter (12). ### Claim 8 (depends on 7) The drive train mount according to claim 7, characterized in that the medium (10) in the second fluid chamber (11) is hydraulic oil, which is pressurized by a high-pressure piston (13) of the pressure transmitter (12). ### Claim 9 (depends on 4, 5, 6, 7, 8) The drive train mount according to one of the claims 4 to 8, characterized in that the fluid or gaseous medium (10) can be pressurized by a pressurizing medium source (14) and a pressure-control valve (15) with pressure at defined frequencies or is connected to an unpressurized return line with these frequencies. ### Claim 10 (depends on 9) The drive train mount according to claim 9, characterized in that the pressure-control valve (15) is actuated electrically and can be controlled by digital circuitry (16). ### Claim 11 (depends on 10) The drive train mount according to claim 10, characterized in that the digital circuitry (16) is part of an electronic control unit (ECU) of a motor vehicle, wherein the control unit (ECU) determines at least the accelerations at the drive train (17) mounted by means of the drive train mount (1) and body of the motor vehicle, and actively counteracts the movement and vibrations in the drive train by means of the appropriate pressure control in the second fluid chamber (11). ### Claim 12 (depends on 9, 10, 11) The drive train mount according to one of the claims 9 to 11, characterized in that the pressure-control valve (15) is controlled by a pulse-width modulated digital signal. ### Claim 13 (depends on 9, 10, 11, 12) The drive train mount according to one of the claims 9 to 12, characterized in that a stop valve (18) is disposed between the drive train mount (1) and the pressure-control valve (15). ### Claim 14 (depends on 9, 10, 11, 12, 13) The drive train mount according to one of the claims 9 to 13, characterized in that the pressurizing medium source (14) comprises a hydraulic pump (19) and a pressure accumulator (20). ### Claim 15 (depends on 9, 10, 11, 12, 13, 14) The drive train mount according to one of the claims 9 to 14, characterized in that the pressure of the pressurizing medium source (14) can be adjusted by a pressure control valve (21). ### Claim 16 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15) The drive train mount according to one of the claims 1 to 15, characterized in that the mount housing (2) is subdivided in an axial direction into a plurality of segments (22, 22′, 22″, 22′″) and a first segment (22) is rigidly connected to the first elastic mount body (3). ### Claim 17 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16) The hydraulically damped drive train mount according to one of the claims 1 to 16, characterized in that the membrane (7) is fixed between the first segment (22) and a second segment (22′) of the mount housing (2). ### Claim 18 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17) The drive train mount according to one of the claims 1 to 17, characterized in that the sealing element (5), which is formed as a piston (8), is guided in a third segment (22″) of the mount housing (2) such that it is axially displaceable. ### Claim 19 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18) The drive train mount according to one of the claims 1 to 18, characterized in that the pressure transmitter (12) and the pressure-control valve (15) are disposed in a fourth segment (22′″) of the mount housing (2), wherein the segments (22, 22′, 22″, 22′″) of the mount housing (2) are connected to one another by means of a positive locking releasable connection. ### Claim 20 (depends on 19) The drive train mount according to claim 19, characterized in that the positive locking releasable connection is formed by threaded fasteners (24), which extend through at least the first and fourth segment (22, 22′″) of the mount housing (2).