METHOD OF DETECTING CLUTCH TIE-UP DURING TRANSMISSION SHIFTING

摘要

The disengagement of the off-going clutch C1-C5 is monitored to determine as early as possible if there is a clutch tie-up due to failure to disengage. Beginning at the initial clutch release command, the turbine speed Nt and output speed No are used to determine if clutch slip has occurred and a pass signal is given if slip occurs in several consecutive control loops. Beginning a preset time after the command to exhaust fully the clutch C1-C5, the number of no-slip conditions are counted. A fail signal is given when a set number of no-slip conditions are counted.