# US 2019/0376568 A1 · Selectable One-Way Clutch with Damper Springs > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0376568 A1 - Document ID: US20190376568A1 - Status: Published application - Kind: A1 - Application number: 16/001,744 - Filed: 2018-06-06 - Published: 2019-12-12 - Earliest claimed: 2018-06-06 - Assignees: GM Global Technology Operations LLC - Applicants: GM Global Technology Operations LLC - Inventors: Farzad Samie; Derek F. Lahr; Chunhao J. Lee - Web page: https://patentgrep.com/patent/US20190376568A1 ## CPC - F16D 41/084: {the intermediate coupling members wedging by pivoting or rocking} - F16D 41/14: the effective stroke of the pawl being adjustable - F16D 41/069: the intermediate members wedging by pivoting or rocking, e.g. sprags (F16D41/061 takes precedence) - F16D 2041/0605: {Spring details} - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract A selectable one-way clutch can be equipped in a vehicle powertrain assembly. The selectable one-way clutch can include a notch plate and a pocket plate. The pocket plate has a pocket, and the notch plate has a notch. A coupling mechanism is disposed in the pocket and is moveable in the pocket. The coupling mechanism is used to bring about engagement between the notch and pocket plates and, in an example, is a strut-type coupling mechanism. A pair of damper springs is disposed in the pocket. A selector plate is situated between the pocket plate and the notch plate. The selector plate includes a window. ## Claims ### Claim 1 A selectable one-way clutch, comprising: a notch plate and a pocket plate, the notch plate having a notch and the pocket plate having a pocket; a coupling mechanism movably disposed in the pocket, the coupling mechanism effecting engagement between the notch plate and the pocket plate; a first damper spring disposed in the pocket and exerting a first spring load to the coupling mechanism, and a second damper spring disposed in the pocket and exerting a second spring load to the coupling mechanism; and a selector plate situated between the notch plate and the pocket plate, the selector plate including a window; wherein, during use of the selectable one-way clutch, when the coupling mechanism is used to effect engagement between the notch plate and the pocket plate, the first and second damper springs compress and expand in response to movement of the coupling mechanism within the pocket. ### Claim 2 (depends on 1) The selectable one-way clutch of claim 1, wherein the first damper spring exerts the first spring load to the coupling mechanism in a first circumferential direction relative to the pocket plate, and the second damper spring exerts the second spring load to the coupling mechanism in a second circumferential direction relative to the pocket plate, the second circumferential direction being opposite to the first circumferential direction. ### Claim 3 (depends on 2) The selectable one-way clutch of claim 2, wherein the first circumferential direction is generally opposite in direction to a first load applied to the coupling mechanism when the notch plate and pocket plate are being engaged, and the second circumferential direction is generally opposite in direction to a second load applied to the coupling mechanism when the notch plate and pocket plate are being engaged. ### Claim 4 (depends on 1) The selectable one-way clutch of claim 1, wherein the coupling mechanism includes a strut housing disposed movably in the pocket, and includes a strut coupled to the strut housing and extendable from the strut housing via a biasing member that biases the strut toward the notch plate. ### Claim 5 (depends on 1) The selectable one-way clutch of claim 1, wherein the pocket plate includes a first spring bore and a second spring bore, the first damper spring being received in the first spring bore and the second damper spring being received in the second spring bore. ### Claim 6 (depends on 1) The selectable one-way clutch of claim 1, wherein the coupling mechanism is moveable reciprocatively within the pocket in response to loads applied to the coupling mechanism during use of the selectable one-way clutch. ### Claim 7 (depends on 1) The selectable one-way clutch of claim 1, wherein the pocket plate includes a shoulder adjacent the pocket, the shoulder arresting movement of the coupling mechanism via abutment between the shoulder and the coupling mechanism. ### Claim 8 (depends on 1) The selectable one-way clutch of claim 1, wherein the first damper spring is of the helical compression spring type, and the second damper spring is of the helical compression spring type. ### Claim 9 (depends on 1) The selectable one-way clutch of claim 1, wherein the first spring load is a variable spring load, the second spring load is a variable spring load, or both of the first and second spring loads are variable spring loads. ### Claim 10 (depends on 1) A vehicle powertrain assembly comprising the selectable one-way clutch of claim 1. ### Claim 11 A selectable one-way clutch, comprising: a notch plate and a pocket plate, the notch plate having a notch, and the pocket plate having a pocket, a first spring bore, and a second spring bore; a coupling mechanism disposed in the pocket, the coupling mechanism effecting engagement between the notch plate and the pocket plate; a first damper spring received in the first spring bore; a second damper spring received in the second spring bore; and a selector plate situated between the notch plate and the pocket plate, the selector plate including a window; wherein, during use of the selectable one-way clutch, when the coupling mechanism is used to effect engagement between the notch plate and the pocket plate, the first damper spring or the second damper spring yields to a load applied at engagement. ### Claim 12 (depends on 11) The selectable one-way clutch of claim 11, wherein the coupling mechanism is moveable within the pocket and moves in response to the load being applied at engagement between the notch plate and the pocket plate. ### Claim 13 (depends on 12) The selectable one-way clutch of claim 12, wherein the coupling mechanism includes a strut housing and a strut, the strut being extendable from the strut housing. ### Claim 14 (depends on 11) The selectable one-way clutch of claim 11, wherein the first damper spring exerts a first spring load to the coupling mechanism in a first circumferential direction relative to the pocket plate, and the second damper spring exerts a second spring load to the coupling mechanism in a second circumferential direction relative to the pocket plate, the second circumferential direction being opposite to the first circumferential direction. ### Claim 15 (depends on 11) The selectable one-way clutch of claim 11, wherein the first spring bore is open to the pocket, and the second spring bore is open to the pocket. ### Claim 16 (depends on 11) The selectable one-way clutch of claim 11, wherein the first damper spring is of the helical compression spring type, and the second damper spring is of the helical compression spring type. ### Claim 17 (depends on 11) The selectable one-way clutch of claim 11, wherein the first spring load is a variable spring load, the second spring load is a variable spring load, or both of the first and second spring loads are variable spring loads. ### Claim 18 A selectable one-way clutch, comprising: a notch plate having a notch; a pocket plate having a pocket, a first spring bore, and a second spring bore; a strut housing disposed in the pocket and being moveable in the pocket; a strut supported in the strut housing and extendable from the strut housing via a biasing member; a first damper spring received in the first spring bore and exerting a first spring load to the strut housing; a second damper spring received in the second spring bore and exerting a second spring load to the strut housing; and a selector plate situated between the notch plate and the pocket plate, the selector plate having a window; wherein, during use of the selectable one-way clutch, when the window is generally in-line with the notch and with the strut housing, the strut extends from the strut housing and through the window and is received in the notch; and wherein, when the strut is received in the notch, a load applied to the strut causes compression of the first damper spring and concomitant movement of the strut housing. ### Claim 19 (depends on 18) The selectable one-way clutch of claim 18, wherein the first damper spring is of the helical compression spring type, and the second damper spring is of the helical compression spring type. ### Claim 20 (depends on 18) A vehicle powertrain assembly comprising the selectable one-way clutch of claim 18.