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

1990-01-11

1991-09-03

Cangialosi, Salvatore

Boots, shoes, and leggings

74866, B06K 4108, G60F 1550

Patent

active

050461753

ABSTRACT:
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.

REFERENCES:
patent: 4494423 (1985-01-01), McCarthy et al.
patent: 4707789 (1987-11-01), Downs et al.
patent: 4785689 (1988-11-01), Iwatsuki et al.
patent: 4843551 (1989-06-01), Milunas
patent: 4940122 (1990-07-01), Fujieda

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