Aisin Aw Co., Ltd.

Yoshinori Maki

Hiroshi Tsutsui

Masatake Ichikawa

Hitoshi Asano

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 P, a releasing-side hydraulic pressure Psweeps down as an initial control. When the releasing-side hydraulic pressure Pbecomes a minute torque capacity [fP(0)+P+P], a hold control, which has a very low gradient &#x3b4;P, is started so that the pressure is substantially held, and, after a rotation change is started, the pressure sweeps down with a low gradient &#x3b4;Puntil release.

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Anjo, Japan

Yoshinori Maki