3.1.3
Fuel sharing mode
The optional fuel sharing mode enables an increased fuel flexibility. You can use liquid fuel
(HFO, MDO, or MGO) and at the same time gas fuel. The fuel sharing mode has the limits that
follow:
•
The engine must operate in ahead direction.
•
The engine power must be more than 50% of CMCR.
•
The maximum ratio of liquid fuel to gas is 50%.
•
The minimum quantity of liquid fuel is 5% related to the total energy input.
You have to select the fuel sharing mode and the ratio of liquid fuel to gas (fuel sharing ratio)
manually.
The gas admission valves (GAV) supply the gas into the combustion chamber. The injection
valves supply the specified quantity of liquid fuel. The gas and the liquid fuel combust at the
same time. The speed governor controls the quantity of the two fuels to the selected ratio.
3.1.4
Dynamic Combustion Control
Dynamic Combustion Control (DCC) enables full power output for gas mixtures with a methane
number of 65 and higher, independent of ambient condition and engine rating.
While DCC is active in combustion stabilising mode, a small amount of liquid fuel is injected by
the main injectors. This increases the speed of the turbochargers. Thus the engine gets
sufficient combustion air to keep the intended gas-air mixture (lambda).
NOTE:
While DCC is active in gas mode the engine remains IMO Tier III compliant related to
NO
x
limits.
X92DF
AA00-0000-00AAA-020B-A
Operation Manual
Short description of the DF engine
Winterthur Gas & Diesel Ltd.
- 67 -
Issue 002 2020-08
Содержание X92DF
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