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Ship engine control system

A technology for control systems and ships, applied in engine control, machines/engines, motor-driven engines, etc., can solve problems such as engine failure and failure to obtain response performance, and achieve the effect of improving fuel efficiency

Inactive Publication Date: 2013-03-13
MITSUI ENG & SHIPBUILDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in bad weather, since the load torque generated by the propeller changes rapidly, sufficient responsiveness cannot be obtained in the PID control using the speed-up that assumes sailing under normal weather conditions, and engine failure due to overspeed may occur. danger

Method used

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Embodiment Construction

[0035] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0036] figure 1 It is a block diagram showing the overall configuration of the marine engine control system according to the first embodiment of the present invention.

[0037] The marine engine control system 10 of the present embodiment has a hull 11 , a main engine 12 , a main shaft 13 , a propeller 14 and the like as control objects S, and fuel is supplied from a fuel injection device (actuator) 15 of a control device C to the main engine 12 . On the main shaft 13 that connects main frame 12 and propeller 14, be provided with and detect the actual rotating speed N of main shaft 13 or main frame 12 E (or the angular velocity ω E ) of an existing known rotational speed (angular velocity) sensor (not shown).

[0038] The control system 10 uses the spindle speed (or engine speed) as a speed command (target value) to perform, for example, PID control, and the actual s...

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Abstract

A main engine is operated at an efficient rotational frequency to match fluctuations in propeller inflow velocity, and fuel efficiency is increased. The divergence between a rotational frequency command and measured variations in rotational frequency (NE) of a main axle (13) or the main engine (12) is inputted into a proportional-integral-derivative (PID) computation unit (16), and feedback control is performed on the quantity of fuel supplied from a fuel injection device (15) to the main engine (12). The propeller inflow velocity of a propeller (14) is detected and inputted into a computation unit (17). The rotational frequency command is adjusted such that the control point moves along an efficiency curve in response to fluctuations in propeller inflow velocity.

Description

technical field [0001] The invention relates to a control system of a marine engine, in particular to the speed control of the marine engine. Background technique [0002] In the control of a marine engine, PID (proportional-integral-derivative) control is performed so that there is no difference between a set target rotational speed and an actual rotational speed. However, in bad weather, since the load torque generated by the propeller changes rapidly, sufficient responsiveness cannot be obtained in the PID control using the speed-up that assumes sailing under normal weather conditions, and engine failure due to overspeed may occur. danger. In response to such a problem, it has been proposed to predict a change in the rotational speed of the propeller due to disturbance and change the configuration of the PID control acceleration (Patent Document 1). [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 8-200131 Contents of the invention [0004] (The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D29/02B63H5/07B63H21/12
CPCB63H21/14F02D29/02B63H5/07B63H21/12
Inventor 稻见昭一宫田淳也
Owner MITSUI ENG & SHIPBUILDING CO LTD
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