Transmission, method for controlling transmission, and non-transitory computer- readable medium

A method for controlling a transmission, the transmission including a primary pulley, a secondary pulley, a transmission member wound around the primary pulley and the secondary pulley, an oil pump configured to supply oil, and a hydraulic control circuit configured to adjust a pressure of the oil supplied from the oil pump to a line pressure which is a source pressure of a primary pulley pressure supplied to the primary pulley and a secondary pulley pressure supplied to the secondary pulley, the method comprising:

• detecting the line pressure;
• and
• selecting, as a target pulley pressure, a higher one of a target value of the primary pulley pressure and a target value of the secondary pulley pressure, variably setting, according to an oil temperature, a target differential pressure including a detection variation of the line pressure detection unit that varies according to the oil temperature, setting a target line pressure which is a target value of the line pressure to a total pressure of the target pulley pressure and the target differential pressure, and controlling the hydraulic control circuit such that the detected line pressure is adjusted to the target line pressure.

A non-transitory computer-readable medium storing a program for controlling a transmission, the transmission including a primary pulley, a secondary pulley, a transmission member wound around the primary pulley and the secondary pulley, an oil pump configured to supply oil, and a hydraulic control circuit configured to adjust a pressure of the oil supplied from the oil pump to a line pressure which is a source pressure of a primary pulley pressure supplied to the primary pulley and a secondary pulley pressure supplied to the secondary pulley, the program causing a computer to execute:

• a line pressure detection procedure of detecting the line pressure;
• and
• a control procedure of selecting, as a target pulley pressure, a higher one of a target value of the primary pulley pressure and a target value of the secondary pulley pressure, variably setting, according to an oil temperature, a target differential pressure including a detection variation of the line pressure detection unit that varies according to the oil temperature, setting a target line pressure which is a target value of the line pressure to a total pressure of the target pulley pressure and the target differential pressure, and controlling the hydraulic control circuit such that the detected line pressure is adjusted to the target line pressure.