Patent ID: 8725375
Filing Date: 2014-05-13
Classification: B60W,Y10T

Abstract:
1. A hydraulic control apparatus for controlling an engagement hydraulic pressure provided to a frictional engagement element that is arranged between a driving source and a driving wheel and that connects/disconnects a torque transmitted between the driving source and the driving wheel in a vehicle, the hydraulic control apparatus comprising: a target engagement hydraulic pressure calculation section configured to calculate a target engagement hydraulic pressure of the frictional engagement element; a slip control section configured to control the frictional engagement element such that a revolution speed at a driving source side of the frictional engagement element is a higher revolution speed than a revolution speed at a driving wheel side of the frictional engagement element; a command current output section configured to output a command current to a solenoid valve that controls the engagement hydraulic pressure provided to the frictional engagement element based on a map that has a relationship between the target engagement hydraulic pressure and the command current; a hydraulic pressure decrease section that, when a vehicle speed is equal to or less than a predetermined vehicle speed at which the vehicle is judged to be at a vehicle stop during execution of slip control, is configured to decrease the engagement hydraulic pressure provided to the frictional engagement element; and a correction section that, when the hydraulic pressure decrease section decreases the engagement hydraulic pressure, is configured to correct the map such that a variation of the command current with respect to a variation of the target engagement hydraulic pressure is smaller than a prior-to-correction variation of the command current with respect to a prior-to correction variation of the target engagement hydraulic pressure.