Propeller system
56
Load indication on MAN Monitoring
Diagnosis System (MMDS) display
The relative engine load can be shown on the
Monitoring and Diagnosis System display as a %.
The term "load" describes the torque of an engine
that is required at a certain rpm.
The display in the figure shows an engine speed of
1200 rpm and a relative load of 80% (example).
Relative load means the percent of the max.
possible torque (full load) currently requested,
which can be delivered by the engine at a certain
rpm.
The engine always delivers as much torque as the
propeller can take at that moment.
Note:
This is calculated at a certain rpm
delivered torque from the diesel injection
quantity.
By comparing it to the max. possible diesel
injection quantity 100% (this is stored in
the control unit) the relative value can be
calculated.
À
Full load torque curve = 100%
Á
Torque takeup from propeller, static
Â
Power reserve of engine at 75% of its rated
speed (100% − 37% = 63%)
40
50
60
70
80
90
100
110
120
Rpmin%
T
orque
1
2
100%
37%
3
Summary of Contents for V12-1800
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Page 12: ...Planning of engine installation 10 V12 1800 1 2 3 4 5 V8 1200 6 7 8 9 4 10 11...
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