Patent ID: 7912614
Filing Date: 2011-03-22
Classification: F16H,Y02T,Y10T

Abstract:
1. An automatic transmission control apparatus for an automatic transmission comprising: a target value setting section that sets a target rotational speed value for at least one of a first frictional engaging element that is engaged for achieving a low speed gear range before execution of a power-off upshifting and a second frictional engaging element that is engaged for achieving a high speed gear range after the power-off upshifting when the automatic transmission is executing the power-off upshifting, and that sets the target rotational speed value for the first frictional engaging element when in a non-shifting, power-off state before the power-off upshifting is executed; a total torque capacity calculating section configured to calculate a total torque capacity required of the first and second frictional engaging elements to obtain the target rotational speed value set by the target value setting section; a distribution ratio setting section that sets a distribution ratio for distributing portions of the total torque capacity between the first and second frictional engaging elements when the automatic transmission is executing the power-off upshifting; an individual torque capacity calculating section configured to calculate an individual torque capacity for each of the first and second frictional engaging elements based on the total torque capacity calculated by the total torque capacity calculating section and the distribution ratio set by the distribution ratio setting section, the individual torque capacity calculating section executing additively correction of the individual torque capacities of the first and second frictional engaging elements by adding a prescribed torque capacity amount to each of the individual torque capacities when the automatic transmission is in an inertia phase in which a compensation is executed for inertia related to changing from a pre-shift gear ratio to a post-shift gear ratio; and a connection control section that controls a connection state of each of the first and second frictional engaging elements in accordance with the individual torque capacities calculated by the individual torque capacity calculating section when the power-off upshifting is executed to shift from a pre-shift gear ratio to a post-shift gear ratio.