Performance Evaluation on ME engine
Wontae, Cho
Technical Instructor
PrimeServ Academy Shanghai
MAN Diesel & Turbo Wontae Cho/CN-EAA Performance evaluation on ME engine ? ? ?? 31.08.2017<> 1
Learning Objectives
Upon completion of this module you
? Know the tolerance of estimated
engine load
? Know the tolerance of pressure
deviation
? Understand why estimated engine load
matters
? Understand the way of performance
evaluation
? Understand the limitation of
performance adjustment on MOP
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Performance evaluation on ME engine ? ? ?? 31.08.2017
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MAN PrimeServ Academy Shanghai
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Contents
1. Monthly performance report
2. Estimated engine load
3. Deviation of Pmax, Pcomp, Pi between cylinders
4. Pmax – Pcomp
5. Mechanical defects
6. Performance report form
7. Protect pressure sensors for PMI system
8. Summary
MAN Diesel & Turbo Wontae Cho/CN-EAA Performance evaluation on ME engine ? ? ?? 31.08.2017<> 3
Performance Evaluation on ME engine
Monthly performance report
? What do you want to say about this performance report?
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Performance evaluation on ME engine ? ? ?? 31.08.2017
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MAN PrimeServ Academy Shanghai
For training For training
purposes only purposes onlyPerformance Evaluation on ME engine
Contents
1. Monthly performance report
2. Estimated engine load
3. Deviation of Pmax, Pcomp, Pi between cylinders
4. Pmax – Pcomp
5. Mechanical defects
6. Performance report form
7. Protect pressure sensors for PMI system
8. Summary
MAN Diesel & Turbo Wontae Cho/CN-EAA Performance evaluation on ME engine ? ? ?? 31.08.2017<> 5
Performance Evaluation on ME engine
Estimated engine load
? It is necessary to keep the estimated engine load on MOP same as the engine load on PMI system/Shaft
Power Meter. The tolerance is within +/- 2%.
? Mismatch between internal and external load estimation can give rise to a wide range of problems.
Including, but not limited to, too restrictive fuel index limiters, wrong cylinder pressure and wrong cylinder
lube oil usage.
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Estimated engine load
? Is the estimated engine load on MOP acceptable or not?
MOP
Performance on PMI System
MAN Diesel & Turbo Wontae Cho/CN-EAA Performance evaluation on ME engine ? ? ?? 31.08.2017<> 7
Performance Evaluation on ME engine
Contents
1. Monthly performance report
2. Estimated engine load
3. Deviation of Pmax, Pcomp, Pi between cylinders
4. Pmax – Pcomp
5. Mechanical defects
6. Performance report form
7. Protect pressure sensors for PMI system
8. Summary
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MAN PrimeServ Academy Shanghai
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Deviation of Pmax, Pcomp, Pi
? Keep Pmax, Pcomp deviation between cylinders within +/- 3 bar
? Keep Pi deivation between cylinders within +/-0.5 bar (+/-0.7 bar for the performance measurement in bad
weather)
? Pmax is adjusted by changing fuel injection timing.
? Pcomp is adjusted by changing exhaust valve closing timing on ME engine.
? Pi is adjusted by changing fuel index (amount).
MAN Diesel & Turbo Wontae Cho/CN-EAA Performance evaluation on ME engine ? ? ?? 31.08.2017<> 9
Performance Evaluation on ME engine
Deviation of Pmax, Pcomp, Pi
? Is Pmax balanced?
? Is Pcomp balanced?
? Is Pi balanced?
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MAN PrimeServ Academy Shanghai
For training For training
purposes only purposes onlyPerformance Evaluation on ME engine
Deviation of Pmax, Pcomp, Pi
? Is Pmax balanced?
? Is Pcomp balanced?
? Is Pi balanced?
MAN Diesel & Turbo Wontae Cho/CN-EAA Performance evaluation on ME engine ? ? ?? 31.08.2017<> 11
Performance Evaluation on ME engine
Contents
1. Monthly performance report
2. Estimated engine load
3. Deviation of Pmax, Pcomp, Pi between cylinders
4. Pmax – Pcomp
5. Mechanical defects
6. Performance report form
7. Protect pressure sensors for PMI system
8. Summary
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MAN PrimeServ Academy Shanghai
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Pmax - Pcomp
? Pmax & Pcomp on MOP is the
target value.
? Compare the average Pmax &
Pcomp between MOP and
PMI system.
? The pressure rise Pmax – Pcomp must not exceed the specified limit.
? Necessary limit is described on the manual.
? Limit for Tier I engine: 35 bar
? Limit for Tier II engine: 40 bar
? If the pressure rise becomes too large, the piston rings will be exposed to very
high pressure shocks, which may result in ring collapse and broken piston rings.
MAN Diesel & Turbo Wontae Cho/CN-EAA Performance evaluation on ME engine ? ? ?? 31.08.2017<> 13
Performance Evaluation on ME engine
Pmax - Pcomp
? Is the average Pmax on PMI system acceptable?
Performance on PMI System
? Is the average Pcomp on PMI system acceptable?
MOP
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MAN PrimeServ Academy Shanghai
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Pmax - Pcomp
? Is the pressure rise Pmax - Pcomp acceptable?
MAN Diesel & Turbo Wontae Cho/CN-EAA Performance evaluation on ME engine ? ? ?? 31.08.2017<> 15
Performance Evaluation on ME engine
Contents
1. Monthly performance report
2. Estimated engine load
3. Deviation of Pmax, Pcomp, Pi between cylinders
4. Pmax – Pcomp
5. Mechanical defects
6. Performance report form
7. Protect pressure sensors for PMI system
8. Summary
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MAN PrimeServ Academy Shanghai
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Mechanical defects
? Performance adjustment on
MOP does not compensate an
excessive wear or damage on
mechanical parts. e.g. worn fuel
pump, leaking exhaust valve,
piston ring blow-by
? Pi must not be adjusted on the
basis of the exhaust gas
temperature after each exhaust
valve.
MAN Diesel & Turbo Wontae Cho/CN-EAA Performance evaluation on ME engine ? ? ?? 31.08.2017<> 17
Performance Evaluation on ME engine
Mechanical defects
? Note it is usually not
necessary to adjust
Pcomp.
? If Pcomp is unbalanced,
you may need to first
check the mechanical
defect before any
adjustment.
MAN Diesel & Turbo Wontae Cho/CN-EAA <> 18
Performance evaluation on ME engine ? ? ?? 31.08.2017
05/09/2017 For training purposes only – Subject may change without further notice! Page 9
MAN PrimeServ Academy Shanghai
For training For training
purposes only purposes onlyPerformance Evaluation on ME engine
Contents
1. Monthly performance report
2. Estimated engine load
3. Deviation of Pmax, Pcomp, Pi between cylinders
4. Pmax – Pcomp
5. Mechanical defects
6. Performance report form
7. Protect pressure sensors for PMI system
8. Summary
MAN Diesel & Turbo Wontae Cho/CN-EAA Performance evaluation on ME engine ? ? ?? 31.08.2017<> 19
Performance Evaluation on ME engine
Performance report form
? Use the excel sheet from MAN for performance recording to avoid any missing information.
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Performance evaluation on ME engine ? ? ?? 31.08.2017
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MAN PrimeServ Academy Shanghai
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Performance report form
? Read service letter SL2014-590 to see necessary readings for proper performance evaluation.
MAN Diesel & Turbo Wontae Cho/CN-EAA Performance evaluation on ME engine ? ? ?? 31.08.2017<> 21
Performance Evaluation on ME engine
Contents
1. Monthly performance report
2. Estimated engine load
3. Deviation of Pmax, Pcomp, Pi between cylinders
4. Pmax – Pcomp
5. Mechanical defects
6. Performance report form
7. Protect pressure sensors for PMI system
8. Summary
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MAN PrimeServ Academy Shanghai
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PMI sensors
ABB
Kistler
? Kistler sensor need calibration every 6-12
months.
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Performance Evaluation on ME engine
PMI sensors
? Service letter SL2016-621
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Performance evaluation on ME engine ? ? ?? 31.08.2017
05/09/2017 For training purposes only – Subject may change without further notice! Page 12
MAN PrimeServ Academy Shanghai
For training For training
purposes only purposes onlyPerformance Evaluation on ME engine
Contents
1. Monthly performance report
2. Estimated engine load
3. Deviation of Pmax, Pcomp, Pi between cylinders
4. Pmax – Pcomp
5. Mechanical defects
6. Performance report form
7. Protect pressure sensors for PMI system
8. Summary
MAN Diesel & Turbo Wontae Cho/CN-EAA Performance evaluation on ME engine ? ? ?? 31.08.2017<> 25
Performance Evaluation on ME engine
Summary
? Estimated engine load on MOP and PMI system should be same within +/-2%
deviation as it is key value to calculate others, e.g. fuel index limit, timing, cylinder
oil feedrate.
? Pmax, Pcomp deviation should be within +/-3 bar.
? Pi deviation should be within +/-0.5 bar.
? Pressure rise Pmax-Pcomp should be within 35 bar or 40 bar. Necessary
pressure rise should be checked on the manual in real life.
? Target value of average Pmax and Pcomp is shown on MOP screen.
? It is usually not necessary to adjust Pcomp. Check mechanical parts first if
deviation is too high.
? Do not adjust Pi (fuel index) due to exhaust gas deviation.
? Mechanical defects cannot be compensated by performance adjustment on MOP.
? Read service letter SL2016-621, SL2014-590.
? Use performance adjustment guide in USB.
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Performance evaluation on ME engine ? ? ?? 31.08.2017
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MAN PrimeServ Academy Shanghai
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purposes only purposes onlyDisclaimer
All data provided in this document is non-binding.
This data serves informational purposes only and is especially
not guaranteed in any way. Depending on the subsequent
specific individual projects, the relevant data may be subject
to changes and will be assessed and determined individually
for each project. This will depend on the particular
characteristics of each individual project, especially specific
site and operational conditions.
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Intellectual Property Rights
The intellectual property rights of this work are owned and managed by MAN
PrimeServ Academy and are protected both nationally and internationally
according to related laws such as copyright law.
? This content is for personal learning and non-commercial use only.
? You may not modify or reproduce it except for your personal use.
This work is the proprietary intellectual property of MAN PrimeServ Academy.
? MAN PrimeServ Academy owns all rights to this work and the lecture, and
this work is only offered by the instructor through the MAN PrimeServ
Academy.
? Any use of this work at will, without the consent of MAN PrimeServ
Academy, may cause legal problems. This work is provided for the
convenience of course participant, and it does not give intellectual property
rights to user.
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