10.22 Special running condition: Cylinder cut out
The engine is designed to run with all its cylinders working. If a cylinder stops working, it must be
repaired as soon as possible. However, if it is impossible to repair the not working cylinder, then
the engine can still be run as long as only 1 or 2 cylinders are not working. This is called cylinder
cut out operation and it is considered a special running condition.
WARNING
The special running condition of the cylinder cut out is only available in diesel mode.
WARNING
Running the engine under a special running condition will impact the following parameters
negatively:
•
Increase of Thermal load
•
Increase of exhaust temperature
•
Increase of torsional vibrations
•
Increase of stress on the Crankshaft
•
Reduction of engine revolutions
•
Reduction of load limit
•
Occurance of Surging
WARNING
If 2 or more cylinders are misfiring, Contact WinGD immediately.
WARNING
Running the engine under special running conditions for more than 2-5 days can damage
the engine. If the engine is run under special running conditions for more than that, contact
the engine builder to obtain advice.
NOTE: If only the fuel for the respective cylinders is cut off, while the same time, the starting air
connections remain intact, then the engine remains fully maneuverable.
NOTE: If the starting air supply is cut off to some cylinders, the engine might not start from all
crankshaft positions. This can be resolved by starting the engine in reverse it or by using
the turning gear to change the starting position.
There are 5 different procedures of cutting a single cylinder out of operation. If it is needed, each
procedure can be repeated to cut of a second cylinder. The correct procedure depends on the
circumstances of under which the cylinder is underperforming, so chose the procedure best fitting
for the circumstances. The 5 procedures are:
•
A.) Cylinder cut out while the piston and exhaust valve are still working and the compression
is still on
•
B.) Cylinder cut out while the piston and exhaust valve are still working and the compression
is off
•
C.) Cylinder cut out while the piston is still moving but the exhaust valve is closed and the
compression is on
X72-B
AA00-0000-00AAA-100A-A
Operation Manual Special running condition: Cylinder cut out
Winterthur Gas & Diesel Ltd.
- 476 - Issue 003 2021-12
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