The present invention relates to a propulsion and braking system using a clutch, the system comprising: a device that has, embedded therein, a clutch operation pressure-regulating valve, and a clutch and gears for controlling a driven body in the same and opposite rotational direction of a driving body; and a control unit for regulating the rotational speed of the driven body so as to enable a continuous operation at a speed that is lower than a rated rotational speed by using the slip of the clutch, and controlling so that the engagement timing control of the clutch and engagement of same are sustained if the driven body requires operation at the rated rotational speed or higher, wherein, when a braking signal is inputted into the control unit during propulsion of the driven body, the control unit removes the operation pressure of the clutch embedded in the device that is in operation, activates the clutch for controlling the rotational direction of the driven body to the reverse rotational direction, and then regulates the operation pressure of the clutch by means of the valve so as to enable the control of the braking of the propulsive body. The propulsion and braking system using a clutch, according to the present invention, is related to all equipment requiring propulsion and braking.

The present invention relates to a propulsion and braking system using a clutch, the system comprising: a device that has, embedded therein, a clutch operation pressure-regulating valve, and a clutch and gears for controlling a driven body in the same and opposite rotational direction of a driving body; and a control unit for regulating the rotational speed of the driven body so as to enable a continuous operation at a speed that is lower than a rated rotational speed by using the slip of the clutch, and controlling so that the engagement timing control of the clutch and engagement of same are sustained if the driven body requires operation at the rated rotational speed or higher, wherein, when a braking signal is inputted into the control unit during propulsion of the driven body, the control unit removes the operation pressure of the clutch embedded in the device that is in operation, activates the clutch for controlling the rotational direction of the driven body to the reverse rotational direction, and then regulates the operation pressure of the clutch by means of the valve so as to enable the control of the braking of the propulsive body. The propulsion and braking system using a clutch, according to the present invention, is related to all equipment requiring propulsion and braking.

A method for controlling a marine propulsion system (MPS) in an imminent crash reversal maneuver is disclosed. The method comprises the steps of: configuring a shift protection type (SPT) to be a Basic Crash Reversal (BCR) or an Advanced Crash Reversal (ACR); configuring parameters for the ACR, including: configuring an Acceleration Time (AT) and a Deceleration Time (DT); configuring a Shift Protection Hold Time (SPHT); configuring an ACR Shift Out of Gear Time (SOGT) and an ACR Shift To Neutral Time (STNT); executing, via a control processor, an Advanced Shift Protection Activation phase, a Shift Request phase, a Slow Vessel Movement Shift Protection phase, a Crash Reversal phase, a Neutral Hold phase, an Engine Recovery phase, and a Normal Shift Protection phase; and restoring a throttle and a gear control to an operator upon completion of a crash reversal maneuver.

An outboard motor includes: an outboard motor body, and a mounting mechanism provided in front of the outboard motor body and mounts the outboard motor body on a boat. The outboard motor body includes: a motor; a drive shaft; a first transmission mechanism transmits rotation of the motor to the drive shaft; a propeller shaft in which a propeller is provided; and a second transmission mechanism transmits rotation of the drive shaft to the propeller shaft. The first transmission mechanism is disposed so that a front part thereof is positioned above a mounting mechanism and a rear part thereof is positioned above the motor.

An outboard motor includes: an outboard motor body, and a mounting mechanism provided in front of the outboard motor body and mounts the outboard motor body on a boat. The outboard motor body includes: a motor; a drive shaft; a first transmission mechanism transmits rotation of the motor to the drive shaft; a propeller shaft in which a propeller is provided; and a second transmission mechanism transmits rotation of the drive shaft to the propeller shaft. The first transmission mechanism is disposed so that a front part thereof is positioned above a mounting mechanism and a rear part thereof is positioned above the motor.

[Problem] In a reduction and reversing gear unit in which hydraulic oil is supplied to a generator motor or the like as cooling oil by a hydraulic pump driven by an electric motor, which is separate from the generator motor, a problem of a noise generated by fully driving the hydraulic pump and the electric motor at all time is solved by assuming a high hydraulic oil temperature when a maximum load acts on the generator motor. [Solution] A reduction and reversing gear unit of the present invention includes an oil cooler disposed in a cooling oil passage that supplies hydraulic oil from an oil tank to a generator motor as cooling oil, a refrigerant pump disposed in a refrigerant piping caused to communicate with the oil cooler, an electric motor that drives the refrigerant pump, and a control unit that controls drive of the electric motor such that a discharge amount of the refrigerant pump is changed in accordance with a load detection value It of a load detection unit that detects a load acting on the generator motor.

[Problem] In a reduction and reversing gear unit in which hydraulic oil is supplied to a generator motor or the like as cooling oil by a hydraulic pump driven by an electric motor, which is separate from the generator motor, a problem of a noise generated by fully driving the hydraulic pump and the electric motor at all time is solved by assuming a high hydraulic oil temperature when a maximum load acts on the generator motor. [Solution] A reduction and reversing gear unit of the present invention includes an oil cooler disposed in a cooling oil passage that supplies hydraulic oil from an oil tank to a generator motor as cooling oil, a refrigerant pump disposed in a refrigerant piping caused to communicate with the oil cooler, an electric motor that drives the refrigerant pump, and a control unit that controls drive of the electric motor such that a discharge amount of the refrigerant pump is changed in accordance with a load detection value It of a load detection unit that detects a load acting on the generator motor.