Automatic transmission with configurable dynamic turbine damper

摘要

A transmission includes a torque converter including a pump and a turbine, and an input hub. A pump lock-up clutch selectively connects the pump and the input hub for directly communicating torque therebetween when the lock-up clutch is engaged. A first pump damper interconnects the pump lock-up clutch and the input hub for damping torsional vibration between the pump and the input hub when the pump-lock up clutch is engaged. A turbine damper interconnects the turbine and either the pump or the input hub. The turbine damper is operable to dampen torsional vibration between the turbine and ether the pump or the input hub when the pump lock-up clutch is engaged. A turbine lock-up clutch selectively connects the turbine and either the input hub or the pump for directly communicating torque between the turbine and the one of either the input hub or the pump.

主权项

1. A transmission comprising:
a torque converter including a pump and a turbine; an input hub; a pump lock-up clutch selectively connecting the pump and the input hub for directly communicating torque therebetween, wherein the pump lock-up clutch is moveable between an engaged position and a disengaged position; a first pump damper interconnecting the pump lock-up clutch and the input hub; a turbine damper interconnecting the turbine and the input hub; and a turbine lock-up clutch selectively connecting the turbine and the input hub, and moveable between an engaged position and a disengaged position; wherein the transmission is operable in a first mode with the pump lock-up clutch disposed in the engaged position and the turbine lock-up clutch disposed in the disengaged position, and in a second mode with the pump lock-up clutch disposed in the engaged position and the turbine lock-up clutch disposed in the engaged position, wherein the first mode of operation allows the turbine and the turbine damper to cooperate with the pump damper to dampen torsional vibration at the input hub at a first frequency, and wherein the second mode of operation prevents the turbine damper from damping torsional vibration between the turbine and the input hub, and allows only the first pump damper to dampen torsional vibration at the input hub at second frequency.