DETERMINING METHOD OF FILLING TIME OF CLUTCH

摘要

PROBLEM TO BE SOLVED: To provide a method for determining when a clutch of an automatic transmission substantially fills with fluid. SOLUTION: The shift control of transmission can reliably be performed if it is accurately determined when a clutch fills with fluid. This method determines when an on-coming speed clutch substantially fills with fluid, in response to determing when an off-going speed clutch releases. Further, it is determined when an on-coming direction clutch substantially fills with fluid, in response to determining when the torque converter output torque suddenly changes.