# US 9,752,666 B2 · Torque converter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,666 B2 - Document ID: US9752666B2 - Status: Granted - Kind: B2 - Application number: 14/057,804 - Filed: 2013-10-18 - Published: 2014-02-13 - Granted: 2017-09-05 - Earliest claimed: 2011-04-21 - Assignees: Schaeffler Technologies AG & Co. KG - Applicants: Schaeffler Technologies AG & Co. KG - Inventors: Benjamin Voegtle; Benjamin Daniel; Thorsten Krause - Web page: https://patentgrep.com/patent/US9752666B2 ## CPC - F16H 45/00: Combinations of fluid gearings for conveying rotary motion with couplings or clutches (gearing systems consisting of a plurality of hydrokinetic units operating alternatively F16H41/22) - F16F 15/12366: {acting on multiple sets of springs} - F16H 45/02: with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) - F16F 15/145: {Masses mounted with play with respect to driving means thus enabling free movement over a limited range} - F16H 2045/0231: {arranged in series} - F16H 2045/0247: {having a turbine with hydrodynamic damping means} - F16H 2045/0263: {the damper comprising a pendulum} - F16H: GEARING - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION ## Abstract A torque converter for transferring torque from an input shaft to an output shaft, having a turbine wheel, an impeller connected to the input shaft to drive the turbine wheel hydrodynamically, a centrifugal force pendulum connected to the turbine wheel to damp torsional vibrations, a first torsion damper to drive the output shaft by means of the turbine wheel, and a converter clutch and a second torsion damper for selective torsionally damped coupling of the input shaft with the turbine wheel. One of the torsion dampers in this case includes two torsion damper elements, which are arranged in series with each other. ## Claims ### Claim 1 A torque converter for transferring a torque from an input shaft to an output shaft, comprising: a turbine wheel; an impeller connected to the input shaft and arranged to hydrodynamically connect to the turbine wheel through a hydraulic clutch; a centrifugal force pendulum connected to the turbine wheel to damp torsional vibrations; a first torsion damper, including: a first input part connected to the turbine wheel; and, a first output part connected to the output shaft; and, a second torsion damper, including: a second input part arranged to connect to the input shaft through a lockup clutch; and, a second output part connected to the turbine wheel, wherein at least one of the torsion dampers includes two torsion damper elements, which are arranged in series with each other. ### Claim 2 (depends on 1) The torque converter as recited in claim 1, wherein the torsion damper that does not include the two torsion damper elements includes an additional torsion damper element. ### Claim 3 (depends on 1) The torque converter as recited in claim 1, wherein the first torsion damper includes a first torsion damper element and the second torsion damper includes a second and a third torsion damper element. ### Claim 4 (depends on 3) The torque converter as recited in claim 3, wherein one of the torsion damper elements of the second torsion damper includes a stop to bridge the torsion damping above a predetermined transmitted torque. ### Claim 5 (depends on 4) The torque converter as recited in claim 4, wherein the stop is provided on a torsion damper element that is rigidly connected to the turbine wheel. ### Claim 6 (depends on 3) The torque converter as recited in claim 3, wherein one of the torsion damper elements of the second torsion damper includes a frictional element to reduce the torsion damping as a function of a transmitted torque. ### Claim 7 (depends on 6) The torque converter as recited in claim 6, wherein the frictional element is set up to reduce the torsion damping only above a predetermined transmitted torque. ### Claim 8 (depends on 6) The torque converter as recited in claim 6, wherein the frictional element is provided on a torsion damper element that is rigidly connected to the turbine wheel. ### Claim 9 A torque converter for transferring a torque from an input shaft to an output shaft, comprising: a turbine wheel; an impeller connected to the input shaft and arranged to hydrodynamically connect to the turbine wheel; a centrifugal force pendulum connected to the turbine wheel to damp torsional vibrations; a first torsion damper, including: a first input part connected to the turbine wheel; and, a first output part connected to the output shaft; and, a second torsion damper, including: a second input part arranged to connect to the impeller; and, a second output part connected to the turbine wheel, wherein at least one of the torsion dampers includes two torsion damper elements, which are arranged in series with each other. ### Claim 10 (depends on 9) The torque converter as recited in claim 9, wherein at least one of the torsion dampers includes an additional torsion damper element. ### Claim 11 (depends on 9) The torque converter as recited in claim 9, wherein the first torsion damper includes a first torsion damper element and the second torsion damper includes a second and a third torsion damper element. ### Claim 12 (depends on 11) The torque converter as recited in claim 11, wherein one of the torsion damper elements of the second torsion damper includes a stop to bridge the torsion damping above a predetermined transmitted torque. ### Claim 13 (depends on 12) The torque converter as recited in claim 12, wherein the stop is provided on a torsion damper element that is rigidly connected to the turbine wheel. ### Claim 14 (depends on 11) The torque converter as recited in claim 11, wherein one of the torsion damper elements of the second torsion damper includes a frictional element to reduce the torsion damping as a function of a transmitted torque. ### Claim 15 (depends on 14) The torque converter as recited in claim 14, wherein the frictional element is set up to reduce the torsion damping only above a predetermined transmitted torque. ### Claim 16 (depends on 14) The torque converter as recited in claim 14, wherein the frictional element is provided on a torsion damper element that is rigidly connected to the turbine wheel. ### Claim 17 (depends on 9) The torque converter as recited in claim 9, wherein the impeller is arranged to hydrodynamically connect to the turbine wheel through a hydraulic clutch. ### Claim 18 (depends on 9) The torque converter as recited in claim 9, wherein the second input part is arranged to non-rotatably connect to the input shaft through a clutch converter.