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Showing posts with label remote automatic control. Show all posts
Showing posts with label remote automatic control. Show all posts

24/06/2024

The main engine does not start. Troubleshooting

Greetings! Today we have a problem with starting the main engine; the engine cannot be started with air by the telegraph command “Forward” and setting a certain speed (the telegraph and the speed controller are not one common device here).

The main engine does not start. Troubleshooting

In the article we will find out what the problem is and what you should pay attention to during routine maintenance of the main engine control unit.

04/05/2024

UPS fail. Main engine automatic backup does not work. Kongsberg Troubleshooting

The UPS fail error occurred and the final system for protecting the main engine against automatic power failure failed. A BMS AC220V UPS FAIL alarm appeared on the alarm monitoring system in the ECR. BMS - Bridge maneuvering system.

BMS AC220V UPS FAIL
BMS AC220V UPS FAIL

In simple words, the uninterruptible power supply (UPS), which is designed for the normal operation of the automatic control system of the main engine during the transition of the ship's electrical station from main to emergency power, has stopped working.

19/07/2023

Failure of the remote automatic control of the main engine. Actions of the ETO. Kongsberg Troubleshooting

Greetings! In this article, we will consider the actions of the ETO in case of failure of the remote automatic control of the main engine (real situation).

Failure of the remote automatic control of the main engine. Actions of the ETO

The vessel is equipped with the AutoChief C20 Propulsion Control System, which is very often used for fixed-pitch MAN MC engines. Produced by Kongsberg Maritime.

10/01/2013

Main Engine Control System for Internal Combustion Marine Diesel Engines

Main engine control system is used for automatic remote control and protection of main ship's diesels. It permits to change direction and speed rotation of propeller directly from the bridge by navigators. The system consists of the equipment installed on the bridge, engine control room (ECR) locally mounted near the engine.

Main Engine Control System for Internal Combustion Marine Diesel Engines

The set of Engine Remote Control equipment in ECR essentially consists of a panel fitted up with the various signalling, alarm and control facilities, in addition to the electronic modules (both logic and analog).

Electronic Control Modules Rack comprises:
a) Engine starting and reversal logic module, with LED display (direction of rotation indicator) of logic status and starting set-point adjust potentiometer status;
b) Digital/analog engine RPM converter with cut-in thresholds and LED display of the status of the thresholds and thresholds adjusting potentiometers.
c) Engine control programmer with LED display of stand-by, RPM reduction, emergency, etc. and acceleration gradient adjusting potentiometer.
d) RPM controller with potentiometers for variables and operating limits adjustment.
e) Torque lirniter, with limit indicator.

Locally Mounted Equipment comprises electro-hydraulic type actuator, for remote control of the fuel linkages; the said actuator is continuously linked mechanically to the lever and is therefore driven by the manual handwheel when it is deenergized.

The equipment also comprises induction type pick-ups to monitor the number of RPM's and rotating direction, as well as a five-position servo-motor, complete with four devices to position the engine local control lever for reversing gears and starting air distributors for engine stop, running ahead, starting ahead, running astern, starting astern. Equipment on Bridge comprises:

1. Engine telegraph.
2. Automatic control panel. It has the following items mounted on panel front:
a) Manual power limiter.
b) Engine speed fine adjustment potentiometer.
c) Illuminated push-button for bridge control demand.
d) "Control transfer inhibited" signal display.
e) "Control on the bridge/ECR" signal display.
f) Direction of engine rotation indicator (LED).
g) Engine RPM indicator.
h) Fuel oil lever actuator position indicator.
3. Shield push-button for emergency stop and emergency manoeuvring.

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