Failsafe system in automatic transmission

Details Failsafe system in automatic transmission Failsafe system in automatic transmission

1986-12-23

1988-11-22

Braun, Leslie A.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74867, 192 30W, B60K 4106

Patent

active

047856890

ABSTRACT:
A failsafe system in an automatic transmission includes: a device for detecting rotary speed of an output shaft of the automatic transmission; a device for detecting either rotary speed of a rotary member other than the output shaft of the automatic transmission or engine rotary speed. When a correlation between the output shaft rotary speed and either the rotary speed of the rotary member or the engine rotary speed is abnormal, control oil pressure in a hydraulic control device of the automatic transmission is increased, whereby slippage in frictionally engaging devices in the hydraulic control device of the automatic transmission during non-shift are effectively eliminated.

REFERENCES:
patent: 3937108 (1976-02-01), Will
patent: 4331046 (1982-05-01), Leonard et al.
patent: 4393732 (1983-07-01), Suzuki et al.
patent: 4414863 (1983-11-01), Heino
patent: 4506564 (1985-03-01), Coutant

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