PrimeServ-Academy Copenhagen Timing of fuel injection (corresponding to VIT adjustment on the MC engine).
Tuning of P,comp is made by adding an offset to the Compression Ratio here
A demand for additional balancing when running low load is supplied here.
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
Adjustment of maximum pressure
P,comp tuning is done by entering a Compression Ratio Offset:
C,Ratio=P,Comp / P,Scav.
C, = Ratio Offset
-1,1 / 3,62 = -0,3
(Reading from P.scav sensor is corrected to Absolute value by adding athmospheric pressure, 1 bar)
PrimeServ-Academy Copenhagen The purpose is to follow alterations in: the combustion conditions, the general cylinder condition, the general engine condition in order to discover any operational disturbances.
-0,27 bar
P(i) tuning: Offset (Highபைடு நூலகம்Load (+0,27/19,1)x100% =1,4%
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
Calculated values
PrimeServ-Academy Copenhagen High Load (MCR 6S70ME-C7: 18.660 kW)
PV diagram
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
Balanced plot, Pmax - Pcomp
PrimeServ-Academy Copenhagen 1,1bar -2,5bar
P,Max. Tuning is
done by entering
an offset
directely in bar
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
Balanced plot, Pi
PrimeServ-Academy Copenhagen 19,1 bar
PMI DAU
Pmax Feedback signals Cylinder pressures
MC/ME Engine
ME Engine - PMI (January 2010)
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
Fuel index adjustment
PrimeServ-Academy Copenhagen Index offset (P,i) at High Load in Percentage.
Index offset (P,i) at Low Load in Percentage.
© MAN Diesel
2010/01/01 < 21 >
ME PMI Auto-tuning
PrimeServ-Academy Copenhagen MOP-B
TCP/IP
Arcnet
MPC
Modbus
Remote I/O with I/P converters
Pmax adjustment signals
PMI / CoCoS-EDS PC
TCP/IP
DAU
MC Engine
ME Engine - PMI (January 2010)
Pmax Feedback signals Cylinder pressure
© MAN Diesel
2010/01/01
Auto tuning: ME & MC engines
Action:
Adjust engine continuously to best operating conditions
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
PMI system – ensures
PrimeServ-Academy Copenhagen To ensures Emissions according Technical File with: specified components >specified Performance<
Adjust Pmax
Identify Pcomp adjust
Adjust Pcomp
Identify MIP adjust
Adjust MIP
Manual offset adjustment
PMI Offline
ME Engine - PMI (January 2010)
© MAN Diesel
Two-stroke diesel engine
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01 < 6 >
PMI – Cylinder Pressure Analyser
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
PMI
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01 < 9 >
PT diagram
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
PT diagram - zoomed
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
MAN Diesel
Portable measuring unit
Junction Box
MOP B
24V
To Tacho System To Pscav sensor
AMS PC
*Optional
Connectors
Fixed Pressure Sensor
Up to 14 cylinders
ME Engine - PMI (January 2010)
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
PMI system – design
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
Limit Pmax Potential
Potential
Pure Pmax level increase Potential 5-10 bar At full as well as part loads
Balancing & Pmax level increase Potential additional 2-5 bar Gain even with engines already being operated within recommended limits
PMI offline
PrimeServ-Academy Copenhagen Pressure transducer PMI controller
Ecroonongmtirnoel
Psuopwpelyr
IOdnivrteifdrrmeeqreubdeoianxtcey
LinEdDicator
Cmofroacurnankntsekhdsahaftat pfftricekeuepnd
2010/01/01 < 20 >
PMI online 2nd generation
HUB
PrimeServ-Academy Copenhagen PMI/CoCoSEDS PC
Engine Control Room
Engine Room
PMI DAU Data Aqusition Unit
Junction box
PMI online – Auto tuning
PrimeServ-Academy Copenhagen Reduction in Fuel oil consumption / CO2 emission 1 bar increase in average Pmax => 0.20 - 0.25 g/kWh decrease in fuel oil consumption