Shift control system for automatic transmission

Details Shift control system for automatic transmission Shift control system for automatic transmission

1994-08-30

1996-06-04

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477152, B60K 4106, F16H 6116

Patent

active

055227791

ABSTRACT:
A shift control system is provided for an automatic transmission having, connected in series, a secondary shifting unit, capable of being shifted between a high speed stage and a low speed stage, and a primary shifting unit which provides plural speed stages including a reverse speed stage. The secondary shifting unit can be set to the high speed stage upon a shift into reverse. The shift control system is equipped with a reverse range detector for detecting a shift from neutral to reverse range, a vehicle stop detector for detecting that vehicle is stopped, and a high speed stage command device for setting the secondary shifting unit at the high speed stage when, subsequent to a shift of the primary shifting unit into reverse, the vehicle is determined by a signal from the vehicle stop detector to have substantially stopped.

REFERENCES:
patent: 4829853 (1989-05-01), Sakaguchi
patent: 4984485 (1991-01-01), Kojima et al.
patent: 5074168 (1991-12-01), Ishikawa et al.

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