Abstract: A lock shaft and a shaft member (a plunger and a permanent magnet) of a magnetic locking device are arranged such that a moving direction thereof is orthogonal to a moving direction of a piston rod of a hydraulic actuator. In a parking lock released state, when the coil is not energized, the lock shaft and the shaft member are locked by an attracting force between the permanent magnet and a flange of a yoke so as not to move back from the piston rod, and, when the coil is energized, the attracting force between the permanent magnet and the flange is canceled, so that the lock shaft and the shaft member are allowed to move back from the piston rod.

Abstract: A hydraulic controller that includes a first oil passage that communicates two ports of a plurality of solenoid valves having a plurality of ports with each other; a second oil passage that communicates two ports of a plurality of valves having a plurality of ports with each other; and a third oil passage provided in a third region provided in an overlapping manner between a first region in which the first oil passage is arranged and a second region in which the second oil passage is arranged, the third oil passage being orthogonal to an overlapping direction of the first region and the second region, wherein the third oil passage communicates any one port out of the ports of the solenoid valves and any one port out of the ports of the valves with each other.

Abstract: A hydraulic control device for an automatic transmission, the hydraulic control device including: a first layer having a first parting surface and a plurality of first grooves formed in the first parting surface; and a second layer that has a second parting surface and a plurality of second grooves formed in the second parting surface and facing the plurality of first grooves, and that is stacked on the first layer in a stacking direction with the second parting surface facing the first parting surface of the first layer, so that the plurality of first grooves and the plurality of second grooves form a plurality of first oil passages.

Abstract: A hydraulic control device for a vehicle drive device that includes a first layer having a first opposing surface, a first groove formed in the first opposing surface, and a first bonding formed on the first opposing surface and surrounding the first groove; and a second layer having a second opposing surface facing the first opposing surface, a second groove facing the first groove and formed in the second opposing surface, and a second bonding facing the first bonding, surrounding the second groove, and bonded to the first bonding, the second opposing surface being placed on, and bonded to, the first opposing surface, so that the first groove and the second groove form a first oil passage.

Abstract: A valve part that includes a body and a spool housing, wherein the spool housing has: a main body that has a hole that slidably houses a spool, a port formed in a wall surface of the hole of the main body and configured to vary a state of communication between an inside and an outside of the main body in accordance with a position of the spool, a communication hole that extends from the port toward a radially outer side, a first projection in which the communication hole is formed and which is formed so as to project from an outside surface of the main body toward the radially outer side, and a first opening at which the communication hole opens at a distal end of the first projection.

Abstract: A hydraulic control device that includes a first layer including a first surface, a first groove having a semicircular cross-sectional shape and formed in the first surface, and a first oil passage having a circular cross-sectional shape, communicating with an end of the first groove, extending in a direction orthogonal to the first surface, and open to the first groove; a second layer including a second surface, and a second groove having a semicircular cross-sectional shape and formed in the second surface to face the first groove, the second layer being stacked on the first layer, with the second surface joined to the first surface; and a second oil passage having a circular cross-sectional shape, defined by the first groove in the first surface and the second groove in the second surface, and communicating with the first oil passage.

Abstract: A hydraulic control device that includes a hole that houses a spool of a valve so as to be movable in an axial direction of the spool, and that has a first port opening in an inner peripheral surface of the hole; a first communication oil passage that extends from the first port toward an outer side in a radial direction of the spool; and a first oil passage that has an opening that communicates with the first communication oil passage.

Abstract: A device includes a switching valve that performs switching between a first state of supplying a line pressure to an oil chamber defined by a case and a piston and a second state of discharging (draining) hydraulic oil in the oil chamber. The device also includes a drain check valve that closes (prohibits the hydraulic oil in the oil chamber from being discharged) when the line pressure is supplied to the oil chamber, and opens (allows the hydraulic oil in the oil chamber to be discharged) when the line pressure is not supplied to the oil chamber. The hydraulic oil is discharged from the oil chamber through the switching valve and the drain check valve.

Abstract: A device includes a switching valve that performs switching between a first state of supplying a line pressure to an oil chamber defined by a case and a piston and a second state of discharging (draining) hydraulic oil in the oil chamber. The device also includes a drain check valve that closes (prohibits the hydraulic oil in the oil chamber from being discharged) when the line pressure is supplied to the oil chamber, and opens (allows the hydraulic oil in the oil chamber to be discharged) when the line pressure is not supplied to the oil chamber. The hydraulic oil is discharged from the oil chamber through the switching valve and the drain check valve.

Abstract: A lock shaft and a shaft member (a plunger and a permanent magnet) of a magnetic locking device are arranged such that a moving direction thereof is orthogonal to a moving direction of a piston rod of a hydraulic actuator. In a parking lock released state, when the coil is not energized, the lock shaft and the shaft member are locked by an attracting force between the permanent magnet and a flange of a yoke so as not to move back from the piston rod, and, when the coil is energized, the attracting force between the permanent magnet and the flange is canceled, so that the lock shaft and the shaft member are allowed to move back from the piston rod.

Abstract: A fluid temperature adjustment device that includes a circulation flow path that circulates the cooling water in one direction between the engine and the radiator; a first flow path branched from the circulation flow path at a location downstream of the engine and upstream of the radiator; a second flow path branched from the circulation flow path at a location downstream of the radiator and upstream of the engine; a third flow path that communicates with a cooling water outlet of the heat exchanger and that is merged with the circulation flow path at a location downstream of the radiator and upstream of the engine; and a switching valve that selectively communicates between one of the first and second flow paths and a cooling water inlet of the heat exchanger.