Shift control device for automatic transmission

Details Shift control device for automatic transmission Shift control device for automatic transmission

1997-12-22

1999-05-11

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

475126, 475292, 477130, F16H61/08

Patent

active

059022132

ABSTRACT:
In an automatic transmission including a gear unit with a second brake connected in series with a one-way clutch and a first brake that is not connected with a one-way clutch, the second brake and the first brake are controlled by linear solenoid valves individually. A vehicle load is detected, and when the vehicle is in a high load state, at first the second brake performs an engagement control, then after input rotation to the gear unit is synchronized with output rotation of the gear unit, the first brake performs an engagement control. When the vehicle is in a low load state, at first the first brake performs an engagement control, then after input rotation to the gear unit is synchronized with output rotation of the gear unit, the second brake performs an engagement control.

REFERENCES:
patent: 4485695 (1984-12-01), Kawamoto
patent: 4881429 (1989-11-01), Kobayashi et al.
patent: 5505673 (1996-04-01), Tsukamoto et al.

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