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MAN B&W 18.02
PMI System, Type PT/S Off�line
On the ME�engines, the mechanical indicator system
<strong>is</strong> replaced by a Pressure Analyser System
for measurement of the cylinder combustion pressure.
The PMI pressure analyser systems measures the
engine’s main parameters, such as cylinder pressure,
scavenge air pressure, engine speed etc.
enabling the engineer to run the diesel engine at
its optimum performance.
<strong>Th<strong>is</strong></strong> system gets its data from a high performance
piezo�electric pressure transducer which <strong>is</strong> to be
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Fig. 18.02.01: PMI type PT/S off�line, 4 75 208
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mounted on the indicator valve. The transducer
<strong>is</strong> moved from one cylinder to another in order to
complete measurements on all cylinders.
The crankshaft position <strong>is</strong> determined by means
of the same trigger system as for the engine control
system.
The PMI system compensates automatically for
the tw<strong>is</strong>ting experienced by each <strong>section</strong> of the
crankshaft due to the torque generated at different
loads.
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178 59 57�7.0
MAN B&W ME/ME�C/ME�GI/ME-B engines 198 45 81�4.4
MAN Diesel