Patent ID: 8845488
Filing Date: 2014-09-30
Classification: B60W,F16H,Y10T

Abstract:
1. A hydraulic control apparatus, comprising: a high hydraulic pressure supplied portion which includes a continuously variable transmission mounted in a vehicle, and to which a relatively high hydraulic pressure is supplied from an electrical hydraulic pump that is driven by a motor; a low hydraulic pressure supplied portion to which a hydraulic pressure that is lower than the hydraulic pressure supplied from the electrical hydraulic pump is supplied from a mechanical hydraulic pump that is driven by an engine; a malfunction detection unit that determines whether the electrical hydraulic pump malfunctions; a discharge pressure increasing unit that increases a volume of hydraulic fluid that is discharged from the mechanical hydraulic pump and increases the hydraulic pressure that is generated by the mechanical hydraulic pump, if the malfunction detection unit determines that the electrical hydraulic pump malfunctions; and an oil supply passage through which, when the hydraulic pressure that is generated by the mechanical hydraulic pump is increased to a relatively high hydraulic pressure by the discharge pressure increasing unit, at least part of the hydraulic fluid of which the hydraulic pressure is increased to the relatively high hydraulic pressure is supplied to the high hydraulic pressure supplied portion the hydraulic control apparatus further comprising: an input torque limiting unit that calculates an upper limit input torque which is an upper limit of a torque that is allowed to be input in the high hydraulic pressure supplied portion based on a volume or a hydraulic pressure of hydraulic fluid that is allowed to be supplied to the high hydraulic pressure supplied portion and that limits a torque that is input from the engine to the high hydraulic pressure supplied portion, if the malfunction detection unit determines that the electrical hydraulic pump malfunctions.