Hydraulic control system for automatic transmission

Details Hydraulic control system for automatic transmission Hydraulic control system for automatic transmission

2007-03-29

2010-11-30

Le, David D (Department: 3655)

192 clutches and power-stop control

Transmission control and clutch control

Common control

Reexamination Certificate

active

07841455

ABSTRACT:
In clutch-to-clutch upshifting, the occurrence of inertia shock is suppressed while racing of the engine is prevented. Corresponding to a first sweep control in which an engaging-side pressure sweeps up toward a target hydraulic pressure PTA, a releasing-side hydraulic pressure PBsweeps down as an initial control. When the releasing-side hydraulic pressure PBbecomes a minute torque capacity [fPB(0)+PKEEP+PLS2T], a hold control, which has a very low gradient δPB, is started so that the pressure is substantially held, and, after a rotation change is started, the pressure sweeps down with a low gradient δPE2until release.

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