Fail-safe gear-shifting control system for an automatic transmis

Details Fail-safe gear-shifting control system for an automatic transmis Fail-safe gear-shifting control system for an automatic transmis

1986-04-23

1987-05-26

Herrmann, Allan D.

Machine element or mechanism

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

Preselected indexed position

3644241, B60K 4106

Patent

active

046675418

ABSTRACT:
In a gear-shifting control system for an automatic transmission, gear-shifting is normally controlled according to main gear-shifting characteristics in which gear-shifting points are determined using the turbine rpm as a parameter. On the other hand, gear-shifting is effected according to backup gear-shifting characteristics which are determined using the vehicle speed as a parameter in case of failure of the part for detecting the turbine rpm.

REFERENCES:
patent: 4523281 (1985-06-01), Noda et al.
patent: 4561055 (1985-12-01), McKee
patent: 4584906 (1986-04-01), Nagaoka et al.

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