Selectable torque transmitting device

An assembly for transmitting a torque in a rotational direction, the assembly comprising:

• a first member;
• a second member including a surface that defines an annular bore having a decreasing diameter in an axial direction;
• a selectable one-way clutch disposed within the annular bore and including a first race rotationally coupled to the first member and a second race opposing the first race and adjacent to the second member, the one-way clutch having a predetermined torque limit and the second race having a surface that opposes the surface of the second member, wherein the surface of the second race has about the decreasing diameter in the axial direction, and wherein the selectable one-way clutch selectively transmits the torque in the rotational direction;
• and
• a biasing element that biases the second race of the selectable one-way clutch against the second member with a predetermined force, and
• wherein the predetermined force contributes to a predetermined holding torque between the surface of the second race of the one-way clutch and the surface of the second member that is less than the predetermined torque limit of the one-way clutch, and wherein the second race rotates with respect to the second member when the torque exceeds the predetermined holding torque.

An assembly disposed in a vehicle transmission for transmitting a torque in a rotational direction, the assembly comprising:

• a gear member of a planetary gear set;
• a female cone member that is one of a portion of a transmission case and a stationary member that is rotatably coupled to a transmission case in a vehicle transmission, the female member including a surface that circumscribes the gear member and defines an annular bore having a substantially conical shape;
• a selectable one-way clutch disposed within the annular bore and including a first race rotationally coupled to the gear member and a second race opposing the first race and adjacent to the female cone member, the one-way clutch having a predetermined torque limit and the second race having a surface that opposes the surface of the female cone member and has about the conical shape in the axial direction, wherein the selectable one-way clutch selectively transmits the torque in the rotational direction;
• a selector plate disposed between the first race and the second race of the selectable one-way clutch and rotatable by an electric motor, the selector plate having at least one stop with the one-way clutch;
• and
• a disc spring that biases the second race of the selectable one-way clutch in the axial direction and against the female cone member with a predetermined force, and
• wherein the predetermined force contributes to a predetermined holding torque between the surface of the second race of the one-way clutch and the surface of the female cone member that is less than the predetermined torque limit of the one-way clutch, and wherein the second race rotates with respect to the female cone member when the torque exceeds the predetermined holding torque, and wherein the stops rotate the selector plate and the selector plate overruns the electric motor when the second race rotates with respect to the transmission case.