MAN B&W 18.02
Page 1 of 1
MAN Diesel
198 85 309.2
MAN B&W ME/ME-C/ME-B/-GI TII engines
PMI Auto-tuning System
Fig. 18.02.01: PMI Auto-tuning system, EoD: 4 75 216
178 62 453.1
PMI-DAU
Abbreviations:
TSA-A: Tacho System Amplifier
CJB: Calibration Junction Box
Cyl: Engine cylinder sensor
DAU: Data Acquisition Unit
Connector with
integrated
charge amplifier
Cyl. 1 Cyl. 2 Cyl. 3 Cyl. 4
Up to 14 cylinders
Scavenge air
pressure sensor
Trigger & TDC pulses from
crankshaft pickup sensors
24V DC
Power
Supply
CJB
Portable measuring unit
Handheld
calibration box
Pressure sensor
Engine control room
MOP B MOP-S
Engine control
& adjustment
Data logging,
monitoring & analysis
Engine
Control
System
(ECS)
VPN Router / Firewall & switch
TSAA
The PMI Auto-tuning system is an advanced cylin-
der pressure monitoring system that automatically
adjusts combustion pressures for optimum per-
formance. This system is specifi ed as standard,
EoD: 4 75 216, and completely replaces the PMI
Offl ine system.
The auto-tuning concept is based on the online
measurement of the combustion chamber pres-
sures from permanently mounted sensors.
The engine control system constantly monitors
and compares the measured combustion pres-
sures to a reference value. As such, the control
system automatically adjusts the fuel injection
and valve timing to reduce the deviation between
measured and reference values. This, in turn,
facilitates the optimal combustion pressures for
the next fi ring. Thus, the system ensures that the
engine is running at the desired maximum pres-
sure, p(max). Furthermore, the operator can press
a button on the touch panel display, causing the
system to automatically balance the engine.
Pressure measurements are presented in real time
in measurement curves on a PC, thereby eliminat-
ing the need for manual measurements. Key per-
formance values are continuously calculated and
displayed in tabular form. These measurements
may be stored for later analysis or transferred to
CoCoS-EDS for further processing.
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