Patent ID: 9574656
Date: 2017-02-21
CPC Classifications: B60Y,F16H

Claim:
1. A control apparatus for an automatic transmission, the automatic transmission including: an input shaft to which a driving force is input; an output member; a plurality of planetary gear mechanisms configured to transmit the driving force input to the input shaft to the output member; and a plurality of engaging mechanisms capable of establishing a plurality of gear ranges by switching a transmission path of the driving force in the plurality of planetary gear mechanisms, wherein the plurality of engaging mechanisms include: a mechanical engaging mechanism configured to function as a brake; and a plurality of hydraulic friction engaging mechanisms, the mechanical engaging mechanism can be switched between a first state in which rotation of a predetermined rotational element, out of a plurality of rotational elements included in the plurality of planetary gear mechanisms, is restricted only in one direction and a second state in which the rotation of the predetermined rotational element is restricted in both directions, the control apparatus comprising: a detection unit configured to detect a vehicle speed; and a control unit configured to control the plurality of engaging mechanisms, wherein the control unit executes switching control to switch the mechanical engaging mechanism from the first state to the second state when a predetermined switching condition is met, in the switching control, after engagement control for setting a plurality of hydraulic friction engaging mechanisms selected from the plurality of hydraulic friction engaging mechanisms in an engaging state, the mechanical engaging mechanism is switched from the first state to the second state, and in the engagement control, if a speed detection result is not more than a threshold, oil pressure supply control for completing the engagement in a time shorter that in a case in which the speed detection result exceeds the threshold is performed.