Clutch slip recovery system and method

摘要

A system and method for transferring torque from a prime mover to a transmission includes a coupling device, a hydraulic control system and a control module. The coupling device includes a torque converter clutch (TCC), where the coupling device is located between an output of the prime mover and an input of the transmission. The TCC is actuated between a fully engaged position, a slip mode where slip occurs, and a fully disengaged position. The hydraulic control system includes a controller device that communicates an actuation pressure to the TCC. The actuation pressure actuates the TCC between the fully engaged position, the slip mode, and the fully disengaged position. The controller is in communication with the TCC, the output of the prime mover, the input of the transmission, and the controller device of the hydraulic control system. The controller regulates the actuation pressure.

主权项

1. A system for transferring torque from an output of a prime mover to an input of a transmission, comprising:
a coupling device including a torque converter clutch (TCC) where the coupling device is located between the output of the prime mover and the input of the transmission, wherein the TCC is actuated between a fully engaged position, a slip mode where slip occurs, and a fully disengaged position; a hydraulic control system including a controller device that communicates an actuation pressure to the TCC, wherein the actuation pressure actuates the TCC between the fully engaged position, the slip mode, and the fully disengaged position; and a controller in communication with the TCC, the output of the prime mover, the input of the transmission, and the controller device of the hydraulic control system, wherein the controller regulates the actuation pressure, the controller comprising:
a first control logic for monitoring the rotational speed of the output of the prime mover and the input of the transmission;a second control logic for determining slip, wherein slip is the difference between a rotational speed of the output of the engine and a rotational speed of the input of the transmission;a third control logic for determining if the slip of the TCC is below a threshold value;a fourth control logic for adjusting the actuation pressure to a first pressure level if the slip of the TCC is below the threshold value of the third control logic, wherein the first pressure level causes the slip of the TCC to increase;a fifth control logic for holding the controller device to the first pressure for a predetermined amount of time; anda sixth control logic for switching the actuation pressure from the first pressure level to a second pressure level, wherein the first pressure level is less than the second pressure level and the second pressure level causes the slip of the TCC to decrease.