Abstract: A housing is placed at an inside space of a case to be installed on a vehicle. The housing includes: a housing plate portion configured to contact a case plate portion of the case; and a receiving space located on one side of the housing plate portion which is opposite to the case plate portion. An electric motor is placed at the receiving space and is configured to output a torque. The housing includes: a housing ventilation hole that extends through the housing plate portion and communicates between an outside space of the housing and the receiving space; and a breathable filter that is placed on a side of the housing ventilation hole, at which the case plate portion is placed, to cover the housing ventilation hole, while the breathable filter is configured to perm it a gas to pass through the breathable filter.

Abstract: A first-type passage switching valve is in an oil supply line connecting a friction element to an N/H type pressure control valve and a second-type passage switching valve is in another oil supply line connecting another friction element to an N/L type pressure control valve. A working-pressure output valve outputs a hydraulic working pressure to each of the first-type and the second-type passage switching valves. The first-type passage switching valve changes communication condition from a first state connecting the friction element and the pressure control valve with each other to a second state connecting the friction element and a drain side with each other, or vice versa. The second-type passage switching valve changes communication condition from a first state connecting the friction element and the pressure control valve with each other to a third state connecting the friction element and a hydraulic pressure source with each other, or vice versa.

Abstract: A first-type passage switching valve is provided in an oil supply line connecting a friction element to an N/H type pressure control valve and a second-type passage switching valve is provided in another oil supply line connecting another friction element to an N/L type pressure control valve. A working-pressure output valve outputs a hydraulic working pressure to each of the first-type and the second-type passage switching valves. The first-type passage switching valve changes its communication condition from a first communication state connecting the friction element and the pressure control valve with each other to a second communication state connecting the friction element and a drain side with each other, or vice versa.

Abstract: A main locking mechanism locks a phase at a main locking phase, at which an intake valve is closed at timing later than a bottom dead center, by inserting a main locking member into a main locking hole. A sub locking mechanism locks a phase at a sub locking phase advanced more than the main locking phase by inserting a sub locking member into a sub locking hole. A movable body disposed in the main locking hole reciprocates between an open position and a blocking position of the main locking hole. During a warm start of an engine, a driving source maintains the movable body at the open position at which the inserting of the main locking member into the main locking hole is maintained. In contrast, during a cold start of the engine, the driving source drives the movable body to the blocking position at which the main locking member is removed from the main locking hole.