A vessel propulsion apparatus includes a first transmission path that transmits the power of an engine to a propeller shaft, a second transmission path that transmits the power of a motor to the propeller shaft, and a controller. A first clutch cuts off the power transmission of the first transmission path in a first disconnection state, and permits the power transmission of the first transmission path in a first connection state. A second clutch cuts off the power transmission of the second transmission path in a second disconnection state, and permits the power transmission of the second transmission path in a second connection state. The controller executes tuning control of both the engine and the motor when the first clutch is switched between the first disconnection state and the first connection state and when the second clutch is switched between the second connection state and the second disconnection state.

In a marine hybrid system which includes an engine, an electric motor, a thrust generation device, and a clutch mechanism configured to be able to switch connection states therebetween, if it is determined that the engine is in an overload condition, the clutch mechanism is controlled such that a load of the engine is reduced.

In a marine hybrid system which includes an engine, an electric motor, a thrust generation device, and a clutch mechanism configured to be able to switch connection states therebetween, if it is determined that the engine is in an overload condition, the clutch mechanism is controlled such that a load of the engine is reduced.

A marine vessel, system, and process provides for reducing or eliminating fuel consumption and emissions of marine vessels. System and method for charging an electricity storage element of an energy storage system of a floating marine vessel may include applying a power source from a marine platform to an electrical power bus of the floating vessel to charge the electricity storage element. A power generator of the marine vessel configured to supply electrical power to the power bus may be configured from an ON state to an OFF state.

A watercraft propulsion system includes an engine, a propeller to be driven by the engine, a generator to be driven by the engine, a rectifier regulator connected to the generator, and a charging controller configured or programmed to control charging of a battery with power generated by the rectifier regulator such that an inductive voltage of the generator approaches one half an inter-terminal voltage of the battery.

A watercraft propulsion system includes an engine, a propeller to be driven by the engine, a generator to be driven by the engine, a rectifier regulator connected to the generator, and a charging controller configured or programmed to control charging of a battery with power generated by the rectifier regulator such that an inductive voltage of the generator approaches one half an inter-terminal voltage of the battery.

A ship propulsion system provides a first power transmission device that transmits power from an internal combustion engine to a propeller, a second power transmission device that transmits power from an electric motor to a propeller and that is mounted to the hull so as to be able to turn up and down independently from the first power transmission device, an actuator for causing the second power transmission device to turn up and down, and a control device. The control device is configured so as to be able to select a first drive mode in which the internal combustion engine is driven and the electric motor is not driven, and a second drive mode in which the internal combustion engine is not driven and the electric motor is driven. When the first drive mode is selected, the actuator is operated so that the second power transmission device turns up.

A ship propulsion system provides a first power transmission device that transmits power from an internal combustion engine to a propeller, a second power transmission device that transmits power from an electric motor to a propeller and that is mounted to the hull so as to be able to turn up and down independently from the first power transmission device, an actuator for causing the second power transmission device to turn up and down, and a control device. The control device is configured so as to be able to select a first drive mode in which the internal combustion engine is driven and the electric motor is not driven, and a second drive mode in which the internal combustion engine is not driven and the electric motor is driven. When the first drive mode is selected, the actuator is operated so that the second power transmission device turns up.

A propulsion system includes at least a first propeller and a second propeller. The propulsion system further includes a first engine configured to directly driving the first propeller and a second engine configured to directly driving the second propeller. The propulsion system further includes a first electric motor provided between the first engine and the first propeller, and a second electric motor provided between the second engine and the second propeller. When the first engine is stopped, the first propeller is configured to be driven by the first electric motor that rotates by power generated by the second electric motor.

A propulsion system includes at least a first propeller and a second propeller. The propulsion system further includes a first engine configured to directly driving the first propeller and a second engine configured to directly driving the second propeller. The propulsion system further includes a first electric motor provided between the first engine and the first propeller, and a second electric motor provided between the second engine and the second propeller. When the first engine is stopped, the first propeller is configured to be driven by the first electric motor that rotates by power generated by the second electric motor.