Abstract: A drive device capable of suppressing the complication of the device configuration in order to realize a plurality of operation modes is provided. A drive device includes a drive source, a first differential mechanism, a second differential mechanism, a switching mechanism, and a casing. The differential mechanism includes a first side gear connected to a left wheel, a first case connected to the drive source, and a second side gear. The second differential mechanism includes a third side gear connected to a right wheel, a second case, and a fourth side gear connected to the second side gear. The switching mechanism switches the casing, the first case, the second side gear, and the fourth side gear to a connection state and a non-connection state.

Abstract: A vehicle includes a main drive unit, a sub drive unit, and a control unit. The main drive unit includes a main drive rotary electric machine. The sub drive unit includes a sub drive rotary electric machine. The control unit includes a driving force distribution ratio setting unit configured to set a driving force distribution ratio between the main driving force and the sub driving force and is configured to control the outputs of the main drive unit and the sub drive unit so that the main driving force and the sub driving force have the driving force distribution ratio set by the driving force distribution ratio setting unit. The driving force distribution ratio setting unit is configured to set the driving force distribution ratio to minimize electric power loss of the vehicle based on a vehicle speed of the vehicle and a required driving force of the vehicle.

Abstract: A vehicle includes a main drive unit, a sub drive unit, and a control unit. The control unit includes a driving force distribution ratio setting unit and is configured to control the main drive unit and the sub drive unit. A drive mode of the main drive unit includes an electric power drive mode and an engine drive mode. The driving force distribution ratio setting unit is configured to set the driving force distribution ratio based on a vehicle speed, a required driving force, and the drive mode. When the drive mode is the engine drive mode, the driving force distribution ratio setting unit is configured to set the driving force distribution ratio so that a distribution ratio of the main driving force is 90% or more.

Abstract: A boat includes: a hull; a float that supports the hull; a suspension that is disposed between the hull and the float and absorbs vibration transmitted from the float to the hull; a sensor that detects an interval between the hull and the float in a vertical direction; a control unit that generates a control signal in accordance with the interval; a battery that is charged or discharged in accordance with the control signal; and a motor that generates electric power by utilizing relative movement between the hull and the float in the vertical direction, charges the battery with the generated electric power in accordance with the control signal, and drives the suspension using the electric power discharged from the battery in accordance with the control signal.

Abstract: A boat includes: a hull; a float that supports the hull; a suspension that is disposed between the hull and the float and absorbs a vibration transmitted from the float to the hull; and a conversion mechanism that converts an energy generated in accordance with a relative movement of the hull and the float in a vertical direction, wherein the conversion mechanism is arranged so as to sandwich a center of gravity of the hull in a forward-rearward direction.

Abstract: A propulsion device for a hydrofoil craft includes: a hydrofoil configured to be disposed in water; and a water jet thruster that is disposed in front of the hydrofoil and ejects a water flow rearward from an ejection port, wherein an upper surface of a rear portion of the hydrofoil is slanted downward toward rear, and the hydrofoil and the water jet thruster are configured such that at least part of the water flow passes above the rear portion of the hydrofoil.

Abstract: A vehicle includes a main drive unit, a sub drive unit, and a control unit. The control unit includes a driving force distribution ratio setting unit and is configured to control the main drive unit and the sub drive unit. A drive mode of the main drive unit includes an electric power drive mode and an engine drive mode. The driving force distribution ratio setting unit is configured to set the driving force distribution ratio based on a vehicle speed, a required driving force, and the drive mode. When the drive mode is the engine drive mode, the driving force distribution ratio setting unit is configured to set the driving force distribution ratio so that a distribution ratio of the main driving force is 90% or more.

Abstract: A vehicle includes a main drive unit, a sub drive unit, and a control unit. The main drive unit includes a main drive rotary electric machine. The sub drive unit includes a sub drive rotary electric machine. The control unit includes a driving force distribution ratio setting unit configured to set a driving force distribution ratio between the main driving force and the sub driving force and is configured to control the outputs of the main drive unit and the sub drive unit so that the main driving force and the sub driving force have the driving force distribution ratio set by the driving force distribution ratio setting unit. The driving force distribution ratio setting unit is configured to set the driving force distribution ratio to minimize electric power loss of the vehicle based on a vehicle speed of the vehicle and a required driving force of the vehicle.