Patent ID: 6645121
Filing Date: 2003-11-11
Classification: F16H,Y10T

Abstract:
A vehicle transmission system, comprising:an input chive shaft configured to be driven by an engine; an output drive shaft configured to drive a drive mechanism; a plurality of torque-transmitting devices connecting said input drive shaft to said output drive shaft and configured to engage and disengage to provide a transition between a plurality of operating ratios of said input drive shaft and said output drive shaft; a control module configured to calculate a temperature of said plurality of torque-transmitting devices based at least in part upon a shifting status of said plurality of torque-transmitting devices, said control module further configured to conduct at least a first modification of the operation of said plurality of torque-transmitting devices if said temperature is at least equal to a first predetermined temperature and a second modification of the operation of said plurality of torque-transmitting devices if said temperature is at least about equal to a second predetermined temperature; and wherein said control module is configured to cease said second modification of the operation of said plurality of torque-transmitting devices if said temperature is less than said second predetermined temperature.