How to control the number of revolutions of a marine engine

摘要

PROBLEM TO BE SOLVED: To provide a marine engine rotation speed control method which enables a marine engine to perform complete combustion by curbing an excessive fuel supply.SOLUTION: In a marine engine rotation speed control method, an engine is operated in a manner that: determines presence or absence of disturbance and a characteristic thereof on the basis of magnitude of pitch of a vessel body; adjusts a rotation speed to a target rotation speed with a normal control characteristic when determining the absence of the disturbance; and manipulates a proportional gain, in a case of PID control for example, so as to keep the engine in an allowable rotation speed fluctuation range and allowable torque fluctuation range when determining the presence of cyclic disturbance.SELECTED DRAWING: Figure 1