WÄRTSILÄ Vasa R22, Instruction Manual

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Other pressures (bar)
Firing pressure See test records
Opening pressure of safety
valve on lube oil pump 6...8
Visual indicator and elec-
tronic transducer for high
pressure drop over lube oil fil-
ter and fuel filter 1.2...1.8
x)
See section 20.4, 8-cylinder engines
xx)
Depending on speed and installation
xxx)
Alarm limit for main engine = idling pressure - 0.3 bar
01.5 Reference conditions
Reference conditions according to ISO 3046/I:
Air pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 100kPa (1.0 bar)
Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . 298K (25°C)
Relative air humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 %
Cooling water temperature of charge air cooler . 298 K (25°C)
In case the engine power can be utilized under more difficult
conditions than those mentioned above it will be stated in the
sales documents. Otherwise, the engine manufacturer can give
advice about the correct output reduction. As a guideline addi-
tional reduction may be calculated as follows:
Reduction factor = (a + b + c) %
a = 0.5 % for every °C the ambient temperature exceeds
stated value in the sales document.
b = 1.0 % for every 100 m level difference above stated value
in the sales document.
c = 0.4 % for every °C the cooling water of the charge air
cooler exceeds stated value in the sales document.
01.6 General engine design
The engine is a turbocharged intercooled 4-stroke diesel engine
with direct fuel injection.
The engine block is cast in one piece. The main bearings are
hanging. The main bearing cap is supported by two hydraulically
tensioned main bearing screws and two horizontal side screws.
The camshaft bearing sites are integrated. The charge air receiver
is cast into the engine block as well as the cooling water headers.
The crankcase and camshaft covers, made of light metal, seal
against the engine block by means of O-rings. The lubricating oil
sump is welded.
01 Main Data, Operating Data and General Design 22-9601
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