Engine control method, engine control system, and ship

Abstract

The present invention addresses the problem of providing an engine control method and an engine control system that improve engine performance using feedforward control, and a ship in which the engine control system is installed. The following are executed: an engine model setting step S1 for setting an engine model 41; a set speed acquisition step S2 for acquiring a set speed nsp of an engine 10; a parameter acquisition step S3 for acquiring parameters that are for predicting fluctuation in the load on the engine 10; a status observation step S4 for applying the parameters to the engine model 41 and observing the status including the fluctuation in the load on the engine 10; a control parameter derivation step S5 for deriving feedforward control parameters that are for controlling the engine 10 on the basis of the result obtained from predicting the load fluctuation and the established speed nsp; and an engine control step S6 for applying the feedforward control parameters to controlling the engine 10.

Description

technical field [0001] The present invention relates to an engine control method, an engine control system and a ship capable of improving engine performance. Background technique [0002] According to EEDI (Energy Efficiency Design Index: Energy Efficiency Design Index) rules, CO 2 Due to the strengthening of emission regulations, marine engines tend to be downsized compared to the size of ships. With the further development of miniaturization of the engine, it is impossible to avoid the adverse effect on the engine of the propeller load fluctuation in the actual sea area only by the current rotational speed feedback control by the governor. [0003] In the past, according to the size of the load fluctuation, the gain of the governor is changed to control or the preset speed is lowered in advance, but it is impossible to achieve the best fuel consumption control by reducing the influence of the propeller load fluctuation on the engine . [0004] Here, Patent Document 1 d...

AI Technical Summary

Problems solved by technology

With the further development of engine miniaturization, it is impossible to avoid adverse effects on the engine due to propeller load fluctuations in actual sea areas only through the current rotational speed feedback control by the governor

[0003] In the past, according to the size of the load fluctuation, the gain of the governor is changed to control or the preset speed is lowered in advance, but it is impossible to achieve the best fuel consumption control by reducing the influence of the propeller load fluctuation on the engine

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