F16H2061/2846

POSITION SWITCHING DEVICE
20220135341 · 2022-05-05 ·

A position switching device includes a rotating body, a drive unit, and a plurality of position switching rods. The rotating body has, on a surface, a plurality of position switching groove groups each defining a plurality of switching positions and rotates about one shaft as a rotation axis. The drive unit rotationally drives the rotating body in a first rotation direction or a second rotation direction opposite to the first rotation direction. The plurality of position switching rods each has one end engaged with corresponding one of the plurality of the position switching groove groups and the other end engaged with corresponding one of a plurality of position switching mechanisms.

CONTROL DEVICE FOR AUTOMATIC TRANSMISSION

A control device executes, when a jump-down shifting is executed, shifting control in which, after engaging elements establishing a pre-shifting gear position are released, an intermediate gear position that is a gear position between the pre-shifting gear position and a post-shifting gear position is established, and after the intermediate gear position is established, the post-shifting gear position is established. When an engaging element able to reduce a rotation speed difference between two rotating bodies connected by engaging elements establishing the intermediate gear position is regarded as a speed difference reducing element, the control device executes a pre-engaging process for generating a torque capacity in the speed difference reducing element while the shifting control is being executed and before establishing the intermediate gear position.

Control device for automatic transmission

A control device executes, when a jump-down shifting is executed, shifting control in which, after engaging elements establishing a pre-shifting gear position are released, an intermediate gear position that is a gear position between the pre-shifting gear position and a post-shifting gear position is established, and after the intermediate gear position is established, the post-shifting gear position is established. When an engaging element able to reduce a rotation speed difference between two rotating bodies connected by engaging elements establishing the intermediate gear position is regarded as a speed difference reducing element, the control device executes a pre-engaging process for generating a torque capacity in the speed difference reducing element while the shifting control is being executed and before establishing the intermediate gear position.

Controller for automatic transmission

When there is a request for a skip downshift that transitionally establishes an intermediate speed position, a surge hydraulic pressure at the start of a torque phase during shift control toward the intermediate speed position is set so as to be lower than a surge hydraulic pressure at the start of a torque phase during shift control toward a required speed position.

Controller for Automatic Transmission

When there is a request for a skip downshift that transitionally establishes an intermediate speed position, a surge hydraulic pressure at the start of a torque phase during shift control toward the intermediate speed position is set so as to be lower than a surge hydraulic pressure at the start of a torque phase during shift control toward a required speed position.