Shift control method for an automatic transmission

Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine

Reexamination Certificate

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Details

C074S366000

Reexamination Certificate

active

06884200

ABSTRACT:
An automatic transmission in which a plurality of gear trains is shifted by a shift mechanism which has at least two stages, including stronger and weaker operational force stages. Shift operation of the shift mechanism is started with the weaker operation force, and is switched to the stronger operation force when the movement of the shift mechanism is detected. Ratio of rotating speeds of input and output shafts is controlled by a clutch variably controlling the transmitted torque. Shift operation of the shift mechanism is switched to the stronger operation force when the ratio of rotating speeds of input and output shafts is close to the rotating speed of the gear being selected.

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