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
 Power reserve of engine at 75% of its rated
speed (100% − 37% = 63%)
40 50 60 70 80 90 100 110 120
Rpmin%
Torque
1
2
100%
37%
3
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