Oil pump system of hybrid vehicle and method for controlling the same

A method for controlling an oil pump system of a hybrid vehicle which supplies operating hydraulic pressure to a transmission of the hybrid vehicle, the method comprising:

• setting driving modes of an electric oil pump based on data detected by a data detector;
• determining a basic flow rate of the set driving modes;
• determining a final flow rate based on the basic flow rate;
• determining a speed command of the electric oil pump based on target hydraulic pressure, an oil temperature, and the final flow rate;
• and
• controlling by a controller, drive of the electric oil pump based on the determined speed command,
• wherein the oil pump system comprises:
• the electric oil pump which supplies the operating hydraulic pressure to the transmission based on the speed command;
• the data detector which detects the data for controlling the electric oil pump;
• and
• the controller which sets the driving modes of the electric oil pump based on the data detected by the data detector, determines the basic flow rate of the set driving modes, determines the final flow rate by compensating for the basic flow rate, and applies the speed command to the electric oil pump,
• wherein the operating hydraulic pressure is supplied to the transmission only by the electric oil pump, and
• wherein the electric oil pump is continuously operated from when the hybrid vehicle starts to when the hybrid vehicle is turned off.