Ship systems and machinery require constant control, whether they work or not, for economical, continuous, efficient, safe, secure and environmentally operation. Shift Engineer should investigate the reason if has any doubts about the system or machine performance, or if observes an abnormality on the operating values. A well-designed ERS with the right algorithms is a very useful tool for training on this subject. Comperative analysis of Diesel engine cylinders pressures is given as an example with figure below to illustrate the importance of this issue. Main propulsion power Diesel engine performance is important for a ship. OOW wants to get information about machine performance, like given in table below, by measuring the pressure of each cylinder with the stand-alone system given in figure below. Although there are many types of this instrument, they all measure the same parameters.

Measurement of cylinder pressures

Cylinder pressure measurement

Action

Command element

Reason

Click on

I/O push button

Turn on the measuring device

Mark

Cylinder on the list

To control

Click on 

Measurement button

To start measuring

See

On the screen

Indicator diagram curve

Injector needle value lift curve Combustion rate curve

Click on

Data transfer button

To make analysis on the recorded data

Read

On the screen

Mean effective pressure (Pi)

Maximum combustion pressure (Pz)

Compression pressure (Pc)

Timing angle (φpz)

Angle of combustion start (φign)

 

Last modified: Wednesday, 3 May 2023, 1:27 PM