WinGD X72 - General

Operation
9308−1/A1
Winterthur Gas & Diesel Ltd.
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Intelligent Combustion Control
1. General 1..........................................................
2. Function 1.........................................................
2.1 Pressure Transducers 2.......................................
2.2 In-cylinder Pressure Evaluation 3..............................
2.3 ICC - Installation and Control 3................................
1. General
The Intelligent Combustion Control (ICC) permanently monitors and automatically
controls the combustion process.
The ICC system adjusts the common injection time, which makes sure that the engine
performance relates to the shop test results.
The ICC calculates the best engine control parameters for operation, which balances
the compression and firing pressures in the engine (e.g. injection time offsets and
exhaust valve closing time for each cylinder).
2. Function
The ICC, as part of the engine control system, adjusts the maximum peak firing
pressure of the engine related to the shop test protocol and NO
x
Technical File. All
ICC modifications of the engine control parameters obey the IMO regulations and are
related to the IMO certificate of the vessel.
The ICC keeps the pressure increase in the limits during the combustion process. As
a result, the ICC system:
D Decreases the excessive wear of engine components
D Decreases the risk of an engine overload
D Prevents manual adjustment failures (only possible during open-loop control).
In the engine control system (ECS), it is possible to set to on or off each individual
function of the ICC system (see 4002-2 Local Control Panel / Local Display Unit,
paragraph 3).
The ICC adjusts the value of the firing pressure to its corrected set-point value. The
system balances the firing pressure of all units and balances the compression
pressure. The cylinder pressure and the firing pressure are balanced in an operation
range that is more than the operation range of the auxiliary blowers (i.e. the auxiliary
blowers are set to off). When all ICC functions are set to off, the engine operates in a
conventional open-loop control mode.
Note: If there are large differences in the values (injection time or exhaust valve
operation) for a cylinder that shows possible wear or damage, monitor
the related cylinder. If necessary, replace the defective parts.
2014