Engagement pressure control apparatus of the starting frictional element at the time of the idle stop control of the vehicle

A devise how to give the starting frictional element engagement pressure command value, the required discharge capacity of the electric oil pump is reduced, allowing miniaturization. An t1 engine idle stop OFF command is restarted, increases and the speed change control hydraulic pressure working oil from engine driven oil pump, the torque by the shift control hydraulic pressure reaches the set pressure value t2 down unnecessary determination idle stop release of the engine control is permitted by this optionally be increased at a predetermined gradient ΔTe1 toward the driving operation corresponding value of the engine torque Te from the torque-down value, the idle stop control including during the idle stop release time control among, the (hard to drain smaller than the normal control drain port opening of the clutch hydraulic control valve for controlling the maximum value (clutch hydraulic pressure (engagement pressure) command value a command value of the starting frictional element engagement pressure Ps). Therefore, when controlling the starting frictional element engagement pressure Ps by receiving this command value, it decided not to drain the hydraulic oil from the electric oil pump Ri, the electric oil pump is not required to discharge hydraulic oil drain minute, it is possible to miniaturize. .Field