Patent ID: 9382953
Filing Date: 2016-07-05
CPC Classification: F16D,Y02T,Y10T

Claim Text:
1. A hydraulic control circuit for a drive line, the hydraulic control circuit comprising: a first switching valve configured to be alternatively switched by a switching hydraulic pressure so as to alternatively connect a first port and a second port, or the first port and a third port, the first port of the first switching valve being connected to a hydraulic actuator; a second switching valve configured to be alternatively switched by the switching hydraulic pressure so as to alternatively connect a first port and a second port, or the first port and a third port, the first port of the second switching valve being connected to the second port of the first switching valve; a first solenoid valve provided in parallel connection to the first switching valve and the second switching valve, the first solenoid valve being configured to supply the switching hydraulic pressure to the first switching valve and the second switching valve; and a second solenoid valve configured to regulate a hydraulic pressure as a control hydraulic pressure, the hydraulic pressure being supplied to the hydraulic actuator, any one of three oil paths operably communicating hydraulic pressure with the hydraulic actuator by supplying the control hydraulic pressure from the second solenoid valve to the hydraulic actuator via any one of the third port of the first switching valve the second port of the second switching valve and the third port of the second switching valve and supplying the switching hydraulic pressure from the first solenoid valve to at least one of the first switching valve or the second switching valve.