Method of detecting clutch tie-up during transmission shifting

Details Method of detecting clutch tie-up during transmission shifting Method of detecting clutch tie-up during transmission shifting

G - Physics

08

B

340/124

G08B 21/00 (2006.01) F16H 61/06 (2006.01) F16H 59/38 (2006.01) F16H 59/68 (2006.01) F16H 61/00 (2006.01)

Patent

CA 2026480

METHOD OF DETECTING CLUTCH TIE-UP DURING TRANSMISSION SHIFTING ABSTRACT OF THE DISCLOSURE The disengagement of the off-going clutch 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 and output speed 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 fully exhaust the clutch, the number of no-slip conditions are counted. A fail signal is given when a set number of no-slip conditions are counted.

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