# US 10,309,484 B2 · Device for damping torsional oscillations > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,484 B2 - Document ID: US10309484B2 - Status: Granted - Kind: B2 - Application number: 15/202,813 - Filed: 2016-07-06 - Published: 2017-01-12 - Granted: 2019-06-04 - Earliest claimed: 2015-07-06 - Assignees: Valeo Embrayages - Applicants: Valeo Embrayages - Inventors: Roel Verhoog - Web page: https://patentgrep.com/patent/US10309484B2 ## CPC - F16F 15/145: {Masses mounted with play with respect to driving means thus enabling free movement over a limited range} - F02B 75/18: Multi-cylinder engines (scavenging aspects F02B25/00) - F02B 2075/1808: {two} - F02B 2075/1812: {three} - F02B 2075/1816: {four} - F16D 2300/22: Vibration damping - F16H 45/02: with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) - F16H 2045/0263: {the damper comprising a pendulum} - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - F16H: GEARING ## Abstract A device for damping torsional oscillations comprises a support rotatable around an axis. At least one pendulum body is movable with respect to the support. At least one bearing member interacts with at least one raceway integral with the support and with at least one raceway integral with the pendulum body. The bearing member rolls along each raceway around an inactive raceway position. The first region is shaped to filter a first order value of the torsional oscillations by the pendulum body when the bearing member rolls along that first region. Two second regions are beyond an end of the first region. Each second region is shaped to filter a second order value of the torsional oscillations by the pendulum body when the bearing member rolls along one of those second regions. The second order value is strictly lower than the first order value. ## Claims ### Claim 1 A device (1) for damping torsional oscillations, comprising: a support (2) capable of moving rotationally around an axis (X); at least one pendulum body (3) movable with respect to the support (2); and at least one bearing member (11) interacting with at least one raceway (12) integral with the support (2), and with at least one raceway (13) integral with the pendulum body (3), so as to guide the movement of the pendulum body (3) with respect to the support (2), the bearing member (11) rolling along each raceway (12, 13) around an inactive position (P0) on said raceway, at least one of those raceways (12, 13) extending between two ends (P2, P2′) and comprising: a first region (30) extending at least on one side of the inactive position (P0) on said raceway (12, 13), that first region (30) having a shape allowing filtering of a first order value of the torsional oscillations by the pendulum body (3) when the bearing member (11) rolls along that first region (30), and two second regions (31) each arranged beyond an end (P1, P1′) of the first region (30), each second region (31) having a shape allowing filtering of a second order value of the torsional oscillations by the pendulum body (3) when the bearing member (11) rolls along one of those second regions (31), the second order value being strictly lower than the first order value, the length of the first region (30), the length of each second region (31), the first order value, and the second order value being selected in such a way that the pendulum body (3) filters a third order value strictly comprised between the first and the second order value upon a maximum deflection of that pendulum body (3). ### Claim 2 (depends on 1) The device according to claim 1, the first region (30) extending on both sides of the inactive position (P0) on said raceway (12, 13). ### Claim 3 (depends on 1) The device according to claim 1, the raceway (13) integral with the pendulum body (3) and the raceway (12) integral with the support (2) each comprising: a first region (30) extending at least on one side of the inactive position (P0) on said raceway, in particular on both sides of that inactive position (P0), that first region (30) having a shape allowing filtering of a first order value of the torsional oscillations by the pendulum body (3) when the bearing member rolls along that first region (30); and two second regions (31) each arranged beyond an end of the first region (30), each second region (31) having a shape allowing filtering of a second order value of the torsional oscillations by the pendulum body (3) when the bearing member (11) rolls along one of those second regions (31), the second order value being strictly lower than the first order value, the length of the first region (30), the length of each second region (31), the first order value, and the second order value being selected in such a way that the pendulum body (3) filters a third order value strictly comprised between the first and the second order value upon a maximum deflection of that pendulum body. ### Claim 4 (depends on 1) The device according to claim 1, the third order value being strictly lower than 2. ### Claim 5 (depends on 4) The device according to claim 4, the first order value being equal to 2 and the third order value being equal to 1 or to 1.5, or the first order value being equal to 1.5 and the third order value being equal to 1. ### Claim 6 (depends on 1) The device according to claim 1, the length of the first region (30) being between 5% and 15%, in particular being equal to 10%, of the length of the raceway (12, 13), that length of that raceway (12, 13) being measured between the two ends (P2, P2′) of that raceway (12, 13). ### Claim 7 (depends on 1) The device according claim 1, the pendulum body (3) comprising a first (5) and a second pendulum mass (5), spaced axially with respect to one another and movable with respect to the support (2), the first pendulum mass (5) being arranged axially on a first side (4) of the support (2) and the second pendulum mass (5) being arranged axially on a second side (4) of the support (2), and at least one connecting member (6) between the first (5) and the second pendulum mass (5) pairing said pendulum masses (5). ### Claim 8 (depends on 7) The device according to claim 7, the raceway (13) integral with the pendulum body (3) being defined by the connecting member (6). ### Claim 9 (depends on 7) The device according to claim 7, comprising two raceways (13) integral with the pendulum body (3), one of those raceways (13) being defined in the first pendulum mass (5) and the other of those raceways (13) being defined by the second pendulum mass (5). ### Claim 10 (depends on 1) A component for a transmission system of a motor vehicle, the component being in particular a dual mass flywheel, a hydrodynamic torque converter, or a friction clutch disk, or a dry or wet dual clutch or a wet single clutch or a flywheel integral with a crankshaft, comprising a damping device (1) according to claim 1. ### Claim 11 (depends on 10) A drive train for a motor vehicle, comprising: a combustion engine, in particular having two, three, or four cylinders; and a component according to claim 10, the third order value being determined as a function of the excitation order of that combustion engine, in particular being equal to the excitation order of that combustion engine. ### Claim 12 (depends on 2) The device according to claim 2, the raceway (13) integral with the pendulum body (3) and the raceway (12) integral with the support (2) each comprising: a first region (30) extending at least on one side of the inactive position (P0) on said raceway, in particular on both sides of that inactive position (P0), that first region (30) having a shape allowing filtering of a first order value of the torsional oscillations by the pendulum body (3) when the bearing member rolls along that first region (30); and two second regions (31) each arranged beyond an end of the first region (30), each second region (31) having a shape allowing filtering of a second order value of the torsional oscillations by the pendulum body (3) when the bearing member (11) rolls along one of those second regions (31), the second order value being strictly lower than the first order value, the length of the first region (30), the length of each second region (31), the first order value, and the second order value being selected in such a way that the pendulum body (3) filters a third order value strictly comprised between the first and the second order value upon a maximum deflection of that pendulum body. ### Claim 13 (depends on 2) The device according to claim 2, the third order value being strictly lower than 2. ### Claim 14 (depends on 3) The device according to claim 3, the third order value being strictly lower than 2. ### Claim 15 (depends on 2) The device according to claim 2, the length of the first region (30) being between 5% and 15%, in particular being equal to 10%, of the length of the raceway (12, 13), that length of that raceway (12, 13) being measured between the two ends (P2, P2′) of that raceway (12, 13). ### Claim 16 (depends on 3) The device according to claim 3, the length of the first region (30) being between 5% and 15%, in particular being equal to 10%, of the length of the raceway (12, 13), that length of that raceway (12, 13) being measured between the two ends (P2, P2′) of that raceway (12, 13). ### Claim 17 (depends on 4) The device according to claim 4, the length of the first region (30) being between 5% and 15%, in particular being equal to 10%, of the length of the raceway (12, 13), that length of that raceway (12, 13) being measured between the two ends (P2, P2′) of that raceway (12, 13). ### Claim 18 (depends on 5) The device according to claim 5, the length of the first region (30) being between 5% and 15%, in particular being equal to 10%, of the length of the raceway (12, 13), that length of that raceway (12, 13) being measured between the two ends (P2, P2′) of that raceway (12, 13).