Patent ID: 6991585
Filing Date: 2006-01-31
Classification: F16D,Y10T

Abstract:
1. A method for controlling operation of a hydraulically-actuated input clutch in an automotive vehicle driveline that includes an internal combustion engine for transmitting input torque to the clutch and having a throttle that is controlled by a displaceable accelerator pedal, and a transmission for producing multiple gear ratios between the clutch and an output, the clutch having a variable torque capacity, slip and clutch pressure, the method comprising the steps of: determining the current magnitude of input torque transmitted to the clutch by the engine; monitoring slip speed at the input clutch; determining a magnitude of clutch pressure that would produce a torque capacity of the input clutch equal to the current magnitude of input torque; monitoring the position of the accelerator pedal to determine whether a transient condition occurs; if no transient condition occurs, pressurizing the clutch at a magnitude of pressure that produces a predetermined slip of the input clutch at the current magnitude of input torque; and if a transient condition occurs, reducing said determined magnitude of input clutch pressure to a predetermined magnitude such that slip occurs at the input clutch.