Control device of vehicular automatic transmission

In relation to an automatic transmission which has a plurality of friction engagement devices that are engaged when supplied with an oil pressure and which establishes a first speed change step by engaging a first friction engagement device of the plurality of friction engagement devices and releasing a second friction engagement device of the plurality of friction engagement devices, and establishes a second speed change step by releasing the first friction engagement device and engaging the second friction engagement device, a control device of a vehicular automatic transmission that switches between the first speed change step and the second speed change step in accordance with a predetermined shift rule, comprising

• a controller which changes the shift rule to an air discharge-purpose shift rule that is set so as to provide a higher probability of switching to the first speed change step than the shift rule in order to discharge air that has intruded in a hydraulic circuit of the first friction engagement device, and which causes switching between the speed change steps in accordance with the air discharge-purpose shift rule.

A control device of a vehicular automatic transmission which has an electric oil pump that generates oil pressure, and a plurality of friction engagement devices that are engaged when supplied with the oil pressure, and which establishes a plurality of speed change steps in accordance with an engaged state and a released state of the plurality of friction engagement devices, comprising:

• a vehicle driving end determination device that determines that an ending operation of ending a driving of a vehicle has been performed;
• and
• an air discharge device that discharges air that has intruded in a hydraulic circuit of a predetermined friction engagement device of the plurality of friction engagement devices by driving the electric oil pump so as to supply oil pressure to the predetermined friction engagement device, if it is determined by the vehicle driving end determination device that the ending operation has been performed.