Patent ID: 8589041
Filing Date: 2013-11-19
Classification: F16H

Abstract:
1. A control device for a vehicle equipped with an automatic transmission that forms a shift stage after a down shift in such a manner that a first frictional engagement element in a disengaged state is engaged while a second frictional engagement element in an engaged state is disengaged by a hydraulic pressure supplied based on a command value outputted to a hydraulic circuit, said control device comprising: a degree detection unit that detects a degree of pressing down an accelerator; a rotation speed detection unit that detects a turbine rotation speed of said automatic transmission; and a control unit that is connected to said degree detection unit and said rotation speed detection unit, wherein said control unit determines whether or not a condition indicating delay of shift is established, based on said degree of pressing down an accelerator and said turbine rotation speed, after increase of a degree of pressing down an accelerator causes start of formation of the shift stage after said down shift, when said condition is established, said control unit outputs a command value corresponding to the hydraulic pressure to be supplied to said first frictional engagement element such that the command value increases at a first rate of change which is determined in advance with a predetermined value being defined as an initial value, when the degree of pressing down the accelerator increases while said control unit outputs the command value such that the command value increases at said first rate of change, said control unit outputs a command value such that the command value increases at a second rate of change which is determined in advance and is different from said first rate of change until an absolute value of a difference between the turbine rotation speed and a synchronized turbine rotation speed corresponding to the shift stage after said down shift decreases to a predetermined value or less, and said second rate of change is higher than said first of change.