Patent ID: 8012051

Claim:
An oil pressure control apparatus comprising: a belt-driven continuously variable transmission in which a belt is clamped with oil pressure to transmit motive power, and a gear ratio is changed by changing a belt hanging radius; a line oil pressure control valve that regulates a line oil pressure that becomes a source pressure of oil pressure of various parts; a gear oil pressure control valve that supplies a gear oil pressure that controls the gear ratio of the belt-driven continuously variable transmission to a driving-side pulley of the belt-driven continuously variable transmission; and a switching means that is connected between the gear oil pressure control valve and the driving-side pulley, and is capable of switching the oil pressure supplied to the driving-side pulley between the gear oil pressure and the line oil pressure; wherein when the gear oil pressure control valve or an electromagnetic valve that controls the gear oil pressure control valve fails, the switching means is switched so as to supply the line oil pressure to the driving-side pulley, and other than during such the gear oil pressure control valve's failure or the electromagnetic valve's failure, the switching means is switched so as to supply the gear oil pressure to the driving-side pulley.