Table of Contents
A main engine slowdown is triggered by faults such as high bearing temperatures, low jacket water pressure or an oil mist alarm, while a shutdown is tripped by critical failures such as low lube oil pressure or overspeed at 107% MCR. The table below compares both parameter lists side by side.
| Slowdown | Shutdown |
|---|---|
| High LO inlet temperature | Low LO inlet pressure to camshaft and piston cooling |
| No flow of Cylinder lube oil | Low LO pressure to the main bearing and thrust bearing |
| High piston cooling outlet temperature | T/C LO inlet pressure low |
| Piston cooling oil non-flow | Thrust bearing very high temperature |
| High main bearing temperature | Over speed of the engine which activates shut down at 107 % MCR (maximum continuous rating) |
| A high crankpin bearing temperature | Exhaust valve spring air low pressure |
| High cross-head bearing temperature | |
| High thrust bearing temperature | |
| High T/C bearing oil temperature | |
| High JCW outlet temperature | |
| Low JCW inlet pressure | |
| High scavenge air receiver temperature | |
| High exhaust gas temperature after cylinder | |
| Control air low pressure | |
| Exhaust gas economizer high temperature | |
| Low fuel oil pressure | |
| OMD alarm |
What are the Main Engine Shut Down Events?
- Low LO inlet pressure to camshaft and piston cooling
- Low LO pressure to the main bearing and thrust bearing
- T/C LO inlet pressure low
- Thrust bearing very high temperature
- Over speed of the engine which activates shut down at 107 % MCR (maximum continuous rating)
- Exhaust valve spring air low pressure
What are the Main Engine slow down Events?
- High LO inlet temperature
- No flow of Cylinder lube oil
- High piston cooling outlet temperature
- Piston cooling oil non-flow
- High main bearing temperature
- A high crankpin bearing temperature
- High cross-head bearing temperature
- High thrust bearing temperature
- High T/C bearing oil temperature
- High JCW outlet temperature
- Low JCW inlet pressure
- High scavenge air receiver temperature
- High exhaust gas temperature after cylinder
- Control air low pressure
- Exhaust gas economizer high temperature
- Low fuel oil pressure
- OMD alarm