View
218
Download
0
Category
Preview:
Citation preview
JACTest Monitoring Center
Test Monitoring CenterReport to the
Mack Test Surveillance PanelJune 17, 2002
Montreal
JACTest Monitoring Center
T-8/T-8E Reference Oil Testing Summary
• Test Activity– Moderately Low
• Currently Calibrated– 3 Labs– 7 Stands
• Current Alarms– None
JACTest Monitoring Center
T-8/T-8E Reference Oil Testing Summary
• Severity Trends (through April 2002 period)– VI38: 0.41 cSt mild– RV48: 0.12 rv units mild– RV2: no severity trend
• Precision– All three parameters
• Within historical levels
• Improving compared to recent periods
JACTest Monitoring Center
JACTest Monitoring Center
JACTest Monitoring Center
JACTest Monitoring Center
T-9 Reference Oil Testing Summary
• Test Activity– Very Low
• Currently Calibrated– 1 Lab– 2 Stands
• Current Alarms– None
JACTest Monitoring Center
T-9 Reference Oil Testing Summary
• Severity Trends (since January 1, 2000)– ALW: 2.1 microns mild– Delta PB: 5 ppm mild– TRWL: 14 mg severe
• Precision– No estimates or comparisons available due to low
activity
JACTest Monitoring Center
JACTest Monitoring Center
JACTest Monitoring Center
JACTest Monitoring Center
T-10 Reference Oil Testing Summary
• Test Activity– Moderately Low
• Currently Calibrated– 5 Labs– 12 Stands
• Current Alarms– CLW: Severity, Mild Direction– TRWL: Severity, Mild Direction
JACTest Monitoring Center
T-10 Reference Oil Testing Summary
• Severity Trends (since March 2002)– CLW: 3.8 microns mild– TRWL: 28 mg mild
• Precision– PB, PB2, OC: show improvement– CLW, TRWL: show degradation
JACTest Monitoring Center
JACTest Monitoring Center
JACTest Monitoring Center
JACTest Monitoring Center
JACTest Monitoring Center
JACTest Monitoring Center
T-10A Reference Oil Testing Summary
• Alarms– none
• Severity Trends (since January 1, 2002)– MRV: 151 cP severe
JACTest Monitoring Center
JACTest Monitoring Center
T-10Liner Wear and Top Ring Weight Loss
• Severity Issues– Noted in May during review of reference data for
target update– Investigated by TMC, Mack, and TEI
JACTest Monitoring Center
T-10Severity Investigation
• Issues Examined– Lab influences– Hardware batches– Reference oils– Liner measurements– Differences in operating parameters
JACTest Monitoring Center
T-10Severity Investigation
• General Observations– Hardware batches
• Change in batch from D to F
• Possible change in liner supplier, Mack to confirm
• Difference in liner surface finish significant, but no impact found on results
• Batch F hardware has been run at Labs A and G only
• T-9 results on same hardware do not confirm T-10 results
JACTest Monitoring Center
T-10Severity Investigation
• General Observations– Liner measurements
• Labs A and G switch from Talysurf to PDI
• Differences seen in results– Lab A: 32.3 Talysurf 29.6 PDI
– Lab G: 34.4 Talysurf 25.9 PDI
• Lab G switch coincides with batch F
• Round robin at same time shows good agreement in measurements throughout industry
JACTest Monitoring Center
T-10Severity Investigation
• General Observations– Differences in operating parameters
• Blowby– Lab G extremely low compared to industry
– Unknown if difference is real or measurement problem
– Potential impacts??
• Humidity– Lab D extremely high compared to industry
– Unknown if difference is real or measurement problem
– Potential impacts??
JACTest Monitoring Center
T-10Severity Investigation
• Cylinder Liner Wear– Lab Influence
• Lab G mild
– Hardware Batch• No effect found
– Reference Oil• No effect found
JACTest Monitoring Center
T-10Severity Investigation
• Cylinder Liner Wear– Liner Measurements
• Effect not likely
• Next round robin to confirm
– Operating Differences• Effect unknown but not likely
– Differences existed prior to severity changes
JACTest Monitoring Center
T-10Severity Investigation
• Cylinder Liner Wear– Conclusion
• Most likely cause of mild shift is Lab G
JACTest Monitoring Center
T-10Severity Investigation
• Top Ring Weight Loss– Lab Influence
• Labs A and G mild
– Hardware Batch• Labs A and G: Batch F
• Labs B, D, and F: Batch D
• Batch F results are mild
– Reference Oil• No effect found
JACTest Monitoring Center
T-10Severity Investigation
• Top Ring Weight Loss– Operating Differences
• Effect unknown but not likely– Differences existed prior to severity changes
JACTest Monitoring Center
T-10Severity Investigation
• Top Ring Weight Loss– Conclusions
• Hardware batch may be driving mild shift
• Lab effects unknown
JACTest Monitoring Center
T-10Severity Investigation
• Proposed Actions– Update Test Targets
• 12 or 13 tests?
• Use pooled standard deviation for CLW to account for lab differences
– Complications: Top Ring Weight Loss• Batch F run only at two labs
• Batch G to be introduced shortly
JACTest Monitoring Center
T-10 Targets and Proposed Targets
CLW TRWL OC PB EOT PB 250-300
Current 32.5 / 3.4 134 / 26 49.6 / 10.9 3.1298 / 0.2847 8.2 / 5.2
820-2
13 tests
29.7 / 3.9 110 / 21 50.6 / 6.6 3.1529 / 0.2388 8.1 / 3.3
820-2
12 tests
30.4 / 3.4 111 / 21 50.6 / 6.9 3.1899 / 0.2067 8.2 / 3.3
JACTest Monitoring Center
Items for Surveillance Panel Consideration
• Liner Wear Measurement Procedure– Currently maintained in T-9 standard– Options
• Keep in T-9. Update via Information Letter.
• Remove from T-9. Change to referenced document, maintained at TMC. Both T-9 and T-10 updated via Information Letter.
JACTest Monitoring Center
Items for Surveillance Panel Consideration
• T-10 Ballot – Information Letter 02-1– Comment regarding Section 8.4.1 on servicing of
injectors• Currently: Servicing of injectors is recommended every
300 h. Resetting of injector opening pressure is recommended if pressure is outside the specification
• Suggested: Inspection of injectors, and cleaning if necessary, is required every 300 h. Resetting of injector opening pressure is required if pressure is outside the specification
JACTest Monitoring Center
Items for Surveillance Panel Consideration
• T-10 Quality Index– Operational Plots / Capability Study– Review with lab engineers to establish thresholds– Proposal to be developed by TMC for panel
consideration
Recommended