Methods and systems are provided for operating a driveline of a four wheel drive vehicle that includes a high gear ratio and a low gear ratio. The driveline may be operated to shift between the high gear ratio and the low gear ratio while the four wheel drive vehicle is moving. In one example, a clutch is opened during shifting from the high gear ratio to the low gear ratio, which allows the vehicle to continue traveling during the gear ratio change.

A control device with an electronic control unit that is configured to perform specific supply control, the specific supply control driving at least one of the rotating electrical machine and the internal combustion engine in a neutral state, and supplying hydraulic pressure to an engagement operating part of a target engagement device with at least one of the rotating electrical machine and the internal combustion engine being driven, the automatic transmission not transmitting power in the neutral state, and the target engagement device being one of the plurality of transmission engagement devices.

Described herein are latching devices where relative speed of movement between members is in part controlled or reduced via eddy current formation and in part controlled or relative motion stopped via a latch arrangement. Various embodiments are described, one being use of a conductive member; at least one magnetic field and a latch member that, prior to latching, moves independently to the at least one conductive member. A kinematic relationship exists between the conductive member and at least one magnetic field that enables the conductive member to move at a different speed relative to the magnetic field on application of an energizing force, thereby inducing an eddy current drag force by relative movement of the conductive member in the magnetic field. The eddy current drag force resulting causes movement of the conductive member causing the conductive member to engage the latch member thereby halting movement between the at least one conductive member and the at least one latch member.

A vehicle drive device includes: an electric motor; a multi-plate clutch including a plurality of clutch plates; a pressing mechanism configured to press the multi-plate clutch; an output rotary member to which a drive force of the electric motor is transferred through the multi-plate clutch; and a control device configured to control the electric motor and the pressing mechanism. The control device is configured to control the pressing mechanism using information on the result of test operation performed while the vehicle is stationary.

An apparatus and a method for controlling a hybrid vehicle are provided. The apparatus includes an engine that generates power by combusting fuel and a drive motor that supplements the power from the engine and operates selectively as an electric generator to produce electrical energy. A clutch is disposed between the engine and the drive motor and a battery supplies electrical energy to the drive motor and is charged with the electrical energy produced by the drive motor. Multiple electric superchargers are installed in multiple intake lines through which outside air to be supplied into a combustion chamber of the engine flows. A controller determines an operation mode of the multiple electric superchargers based on required power of a driver and a state of charge (SOC) of the battery and adjusts the power output from the engine and the power output from the drive motor.

Provided is a vehicle in which an internal combustion engine can be suitably assisted by a rotating electrical machine. The vehicle is provided with an internal combustion engine, a rotating electrical machine, a transmission, a clutch placed between the transmission and the combination of the internal combustion engine and rotating electrical machine, and a motive power control device that controls the motive power of the internal combustion engine and the rotating electrical machine. The motive power control device calculates additional motive power for the rotating electrical machine on the basis of the difference between the motive-power-transmitting capacity of the clutch and the motive power of the internal combustion engine.

A control apparatus for a drive-force transmitting apparatus that defines a first drive-force transmitting path that is to be established by engagements of a first frictional engagement device and a dog clutch and a second drive-force transmitting path in which a lower gear ratio is provided than in the first drive-force transmitting path. In a second running mode with the second drive-force transmitting path being established, the control apparatus places the dog clutch in a released state when a vehicle running speed is higher than a first speed value, and places the dog clutch in an engaged state when the running speed is not higher than the first speed value. Further, in the second running mode, the control apparatus inhibits the dog clutch from being switched to the released state when an accumulated heat quantity in a synchromesh mechanism of the dog clutch is larger than a first quantity value.

A control device for a vehicle having: an engine; a torque converter having a lock-up clutch; an engagement element disposed downstream of the torque converter; a drive shaft disposed downstream of the engagement element; and an electric motor disposed downstream of the engagement element, and connected to the drive shaft includes a control portion adapted to: in a case where an electric travel mode in which the lock-up clutch and the engagement element are disengaged is switched to an engine travel mode in which the lock-up clutch is disengaged and the engagement element is engaged, decrease driving torque of the electric motor after engagement of the engagement element; and gradually decrease the driving torque of the electric motor while gradually increasing driving torque of the engine after the driving torque of the electric motor is decreased.

Methods and systems are provided for operating a driveline of a four wheel drive vehicle that includes a high gear ratio and a low gear ratio. The driveline may be operated to shift between the high gear ratio and the low gear ratio while the four wheel drive vehicle is moving. In one example, a clutch is opened during shifting from the high gear ratio to the low gear ratio, which allows the vehicle to continue traveling during the gear ratio change.

Provided is a power transmission control device capable of reliably performing engagement between an engagement member and a target engagement member, by operating the engagement member to slide by an actuator having an elastic member deformed by transmitting a load received by the engagement member. An actuator has an elastic member, and a control unit calculates the differential rotation between an engagement member and target engagement members on the basis of the detected rotation speeds of a first rotation shaft and a second rotation shaft, and makes differential rotation coincide with a predetermined differential rotation by adjusting the rotation speed of power sources. After the differential rotation coincides with the predetermined differential rotation, in establishing the engagement, the predetermined differential rotation sets the differential rotation on the basis of a natural frequency generated in conjunction between the actuator and the engagement member by the elastic member.