DEVICE AND METHOD FOR CONTROLLING OIL PRESSURE OF VEHICLE

An assessment of 'base neutral ' is made when the difference between a command oil pressure and the actual oil pressure of a hydraulic clutch is within a prescribed microvalue range, and when the difference is outside of the microvalue range, an assessment of 'raise base' is made if the command oil pressure is greater than the actual oil pressure, and an assessment of 'lower base' is made if the command oil pressure is less than the actual oil pressure. An assessment of 'raise sub' is made when the command torque processed using a low-pass filter tends to be positive for at least a prescribed time, an assessment of 'lower sub' is made when the command torque tends to be negative for at least a prescribed time, and the tendency of the command torque to increase or decrease is assessed. When the assessment is 'raise base', the command oil pressure corresponding to the command torque is determined using a pressurization characteristic in hysteresis characteristics, and when the assessment is 'lower base ', the c