Hydraulic circuit

Abstract

A hydraulic circuit including: a torque converter control valve, and a lock-up control valve, in which 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, and oil flowing in from the third port urges the valve body toward the second valve position.