Patent ID: 8882550
Filing Date: 2014-11-11
Classification: B63H,F02D,F16D,Y10T

Abstract:
1. A ship propulsion device comprising: a propeller configured to propel a ship; an engine configured to rotate the propeller; a clutch configured to transmit revolutions of the engine to the propeller; an input means configured to input a state of the clutch; a rotational speed detection means configured to detect a rotational speed of the propeller; and a control means configured to control operational speed of the engine and the state of the clutch, wherein the control means operates the engine at a first engine speed when the clutch is an a disengaged state; the control means, based on the input of the input means, changes the state of the clutch from the disengaged state to a partially engaged state and operates the engine at a second engine speed that is higher than the first engine speed; the control means, based on a detected rotational speed of the propeller by the rotational speed detection means, operates the engine at an engine speed that is lower than the second engine speed; and the control means, based on the input of the input means, changes the state of the clutch from the partially engaged state to an engaged state.