Hydraulic control system for vehicle

A hydraulic control system for a vehicle comprising a continuously variable transmission in which a torque transmitting capacity thereof is changed hydraulically, and an engagement device which is connected to the continuously variable transmission in series and in which a torque transmitting capacity thereof is changed hydraulically, comprising:

• an electronic control unit including a ROM for storing predetermined calculation formulas and maps, a RAM for temporarily storing detection signals from sensors and calculation values, and a CPU for carrying out a calculation,
• the control unit configured to select a command pattern for setting an engagement pressure of the engagement device out of a plurality of patterns based on first and second line pressures of an oil passage of the system, where the first pressure is an initial pressure detected by at least one of the sensors, and the second pressure is a predetermined steady pressure corresponding to normal operation of the vehicle, and the electronic control unit is configured to select the command pattern for setting the engagement pressure of the engagement device out of the plurality of patterns when the initial pressure is lower than the steady pressure;
• and
• wherein the control unit is further configured to select the command pattern in such a manner that the torque transmitting capacity of the engagement device does not exceed the torque transmitting capacity of the continuously variable transmission, when the initial pressure is lower than the steady pressure, and does not exceed a rotational speed of the continuously variable transmission.