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http://www.up.ac.za/academic/mae/research/design/diesel-lube1.pdf

DIESEL ENGINE FAILURES DUE TO FUEL WITH INSUFFICIENT LU...
Although the majority of soot produced during combustion exits
through the exhaust, some passes through the rings of the
c...
It is up to the motor oil’s dispersants to keep soot particles
dispersed. However, in high soot conditions, dispersants ca...
Effect of Soot
Agglomeration
Diesel Engine Car
IC: 3.0 MD: 75 DP: 75
Very high quantity of soot due to a
long draining period


Diesel Engine Car
IC: 0...
Truck
IC: 1.1 MD: 85 DP: 16
The combustion is correct but the
disper-
sancy is slightly degrading due to oil
oxidation as ...
CENTRIFUGE
CENTRIFUGE
K2 GS500 Right Piston
The right piston just removed during engine overhaul. Nice big carbon deposits here.
Figure 3. Valve
Figure 2. Valve
                  with severely
guttering or
                  recessed (worn)
torching
  ...
Figure 4. Valve deck from a Caterpillar
3512TALE natural gas engine showing
very low to absent varnish and
sludge
Figure 5. Cylinder head from a Caterpillar 3512TALE
natural gas engine showing very low deposits
after 8,824 hours
Figure 7. Oil pan shows very low to absent
varnish and sludge
Figure 8. Piston undercrown shows
extremely low varnish deposits
Figure 9. Piston ring zone from a
Caterpillar 3512TALE natural gas engine
after 8,843 hours shows extremely low
carbon dep...
Figure 10. Piston liner shows very low polishing
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
Fallos de Motores Diesel por Dilusion y Carbono
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Fallos de Motores Diesel por Dilusion y Carbono

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La Dilusion (pase de combustible Diesel por combustion incompleta al carter) origina desgaste y deposicion de carbono.

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Fallos de Motores Diesel por Dilusion y Carbono

  1. 1. http://www.up.ac.za/academic/mae/research/design/diesel-lube1.pdf DIESEL ENGINE FAILURES DUE TO FUEL WITH INSUFFICIENT LUBRICITY
  2. 2. Although the majority of soot produced during combustion exits through the exhaust, some passes through the rings of the combustion chamber and enters the engine oil. As long as these soot particles remain suspended in the oil and are not allowed to agglomerate they pose little risk to engine parts.
  3. 3. It is up to the motor oil’s dispersants to keep soot particles dispersed. However, in high soot conditions, dispersants can become quickly depleted. Once this happens the soot particles rapidly agglomerate to form particles with diameters well over a micron.
  4. 4. Effect of Soot Agglomeration
  5. 5. Diesel Engine Car IC: 3.0 MD: 75 DP: 75 Very high quantity of soot due to a long draining period Diesel Engine Car IC: 0.5 MD: 28 DP: 36 Poor dispersancy due to a coolant leak Hydraulic Shovel IC: 0.3 MD: 60 DP: 12 Feeble dispersancy; poor engine cooling
  6. 6. Truck IC: 1.1 MD: 85 DP: 16 The combustion is correct but the disper- sancy is slightly degrading due to oil oxidation as the result of a tiring engine Gas Engine IC: 0.2 MD: 65 DP: 7 Poor dispersancy due to an extended drain interval Marine Diesel Engine IC: 0.2 MD: 59 DP: 8 High lubricant contamination with heavy fuel Worksite Truck IC: 0.8 MD: 95 DP: 4 Good combustion and good dispersancy
  7. 7. CENTRIFUGE
  8. 8. CENTRIFUGE
  9. 9. K2 GS500 Right Piston The right piston just removed during engine overhaul. Nice big carbon deposits here.
  10. 10. Figure 3. Valve Figure 2. Valve with severely guttering or recessed (worn) torching sealing face
  11. 11. Figure 4. Valve deck from a Caterpillar 3512TALE natural gas engine showing very low to absent varnish and sludge
  12. 12. Figure 5. Cylinder head from a Caterpillar 3512TALE natural gas engine showing very low deposits after 8,824 hours
  13. 13. Figure 7. Oil pan shows very low to absent varnish and sludge
  14. 14. Figure 8. Piston undercrown shows extremely low varnish deposits
  15. 15. Figure 9. Piston ring zone from a Caterpillar 3512TALE natural gas engine after 8,843 hours shows extremely low carbon deposits.
  16. 16. Figure 10. Piston liner shows very low polishing

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