Hydraulic circuit

A hydraulic circuit comprising:

• a torque converter control valve configured to control oil supplied to a torque converter;
• and
• a lock-up control valve configured to control oil supplied to a piston oil chamber of the torque converter,
• the hydraulic circuit further comprising:
• a second oil passage through which oil supplied from the torque converter control valve to the torque converter flows;
• and
• a third oil passage through which oil discharged from the torque converter flows, wherein
• the lock-up control valve includes
• a valve body that is displaceable in an axial direction,
• an actuator that causes the valve body to displace toward a first valve position on one side in the axial direction,
• an urging member that causes the valve body to displace toward a second valve position on the other side in the axial direction,
• a first port to which oil having a line pressure as a source pressure is supplied,
• a second port that communicates with a first oil passage connected to the piston oil chamber,
• a third port that communicates with the first oil passage, and
• a drain port,
• the valve body is displaceable between the first valve position and the second valve position, the first valve position allowing the first port and the second port to communicate with each other, the second valve position allowing the second port and the drain port to communicate with each other,
• oil flowing in from the third port urges the valve body toward the second valve position,
• the torque converter control valve includes
• a valve body that is displaceable in an axial direction,
• an elastic member that causes the valve body of the torque converter control valve to displace toward a third valve position on one side in the axial direction,
• a sixth port to which the oil having the line pressure as a source pressure is supplied,
• a seventh port that communicates with the first oil passage,
• an eleventh port that communicates with the second oil passage, and
• a twelfth port that communicates with the third oil passage,
• oil flowing in from the seventh port urges the valve body of the torque converter control valve toward the third valve position, and
• oil flowing in from the eleventh port and oil flowing in from the twelfth port urge the valve body toward a fourth valve position on the other side in the axial direction.