Hydraulic control device and method for controlling the same

A control method for a hydraulic control device for controlling hydraulic pressure supplied to a continuously variable transmission configured by stretching a power transmission member between a first pulley and a second pulley, wherein

• the hydraulic control device includes:
• a pressure regulating valve including an input port to which line pressure is input, an output port, a drain port, and a spool, the output port being configured to supply an oil chamber of the second pulley with a second pulley pressure, the drain port being configured to discharge the second pulley pressure from the oil chamber, the spool moving according to pilot pressure to regulate the second pulley pressure;
• and
• a solenoid valve configured to control the pilot pressure, wherein
• the control method controls the line pressure on the basis of the second pulley pressure and first pulley pressure of the first pulley, the control method temporarily changing the pilot pressure from set pressure to configure the line pressure identical to the second pulley pressure.

A hydraulic control device for controlling hydraulic pressure supplied to a continuously variable transmission configured by stretching a power transmission member between a first pulley and a second pulley, the hydraulic control device comprising:

• a pressure regulating valve that includes an input port to which line pressure is input, an output port, a drain port, and a spool, the output port being configured to supply an oil chamber of the second pulley with a second pulley pressure, the drain port being configured to discharge the second pulley pressure from the oil chamber, the spool moving according to pilot pressure to regulate the second pulley pressure;
• a solenoid valve configured to control the pilot pressure;
• line pressure control means for controlling the line pressure on the basis of the second pulley pressure and first pulley pressure of the first pulley;
• and
• hydraulic control means for temporarily changing the pilot pressure from set pressure to configure the line pressure identical to the second pulley pressure.