Patent ID: 7325665
Filing Date: 2008-02-05
Classification: F16H,Y10T

Abstract:
1. A control apparatus for an automatic transmission including an engaging element that is engaged when a vehicle starts to run, comprising: a first detector which detects braking force of a braking device of the vehicle; a second detector which detects the braking force of the braking device; and a controller which performs neutral control for placing the engaging element in a half-engaged state or a released state, when a vehicle state satisfies a predetermined condition and the vehicle stops while a forward running position is selected, the controller performing control for returning from the neutral control to normal control based on a signal from a switch that serves as the second detector and that detects whether the braking device is operating, when an abnormality has occurred in the first detector, wherein, when the first detector is operating normally, the controller sets a returning mode in which control returns from the neutral control to the normal control based on a releasing mode in which the braking device is released, the releasing mode being determined based on the braking force of the braking device detected by the first detector and the signal from the switch, and the controller performs the control for returning from the neutral control to the normal control based on the set returning mode, wherein the controller determines first release timing at which the braking device is released, based on the braking force detected by the first detector, determines second release timing at which the braking device is released, based on the braking force detected by the second detector, sets the returning mode based on a speed at which the braking device is released, the speed being calculated based on the first release timing and the second release timing, and performs the control for returning from the neutral control to the normal control based on the set returning mode.