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The temperature of the exhaust gas and the temperature of the exhaust system components can reach up to |
Regeneration is the removal of soot from the Diesel Particulate Filter (DPF). The Aftertreatment Regeneration Device (ARD) is used to regenerate the DPF. The DPF traps both soot and ash. The ash is removed through a manual cleaning process. Refer to Operation and Maintenance Manual, "Diesel Particulate Filter - Clean" for more information on the service of the DPF.
Passive Regeneration - Is a chemical reaction within the system and the engine will create enough heat in order to regenerate the DPF.
Active Regeneration - The engine does not create enough heat in order to regenerate the DPF. The ARD must be used to create the heat necessary to regenerate the DPF.
Five dash lamps can be affected by the DPF regeneration. Also, the horn can be used in order to alert the operator.
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High Exhaust System Temperature Lamp (HEST) - The lamp is illuminated when the ARD is activated and the exhaust temperature is greater than |
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DPF Lamp - This lamp provides a general indication of the soot load. The lamp is off when the soot load is normal. The lamp will operate at level 2. |
Note: In some situations, the DPF lamp may stay illuminated when the soot load is below 90%. The illuminated DPF lamp indicates that a complete regeneration has not been performed. A complete regeneration is when the soot level is reduced to 0%. If the DPF lamp stays illuminated, perform a regeneration without interruption until the soot level is reduced to 0%. A complete regeneration will reset the DPF lamp.
- Enhanced automatic regeneration
- Forced Regeneration
Enhanced automatic regeneration is controlled by the engine ECM. During this regeneration the operator will see the high exhaust system temperature lamp (HEST) illuminated.
Enhanced automatic regeneration - This mode of DPF regeneration allows for regeneration to take place at higher engine rpm and higher engine loads. In order for enhanced automatic regenerations to occur, the following conditions must be met:
- Soot level must be between level 2 and level 3 on the soot level monitor (if equipped).
- Engine speed must be greater than 1400 rpm.
- Minimum engine idle speed input must be set. Setting the input will not allow engine speed to fall below 1000 rpm during enhanced automatic regeneration. If minimum low idle speed input is not available, regeneration will stop if engine speed drops below 1000 rpm.
- Refer to the OEM for the applications interlocks required to be engaged before regeneration can take place.
Forced regeneration - A forced regeneration can be initiated by moving the regeneration switch to the upward position. A forced regeneration is allowed during normal operation up to level 3. A forced regeneration can be performed in the enhanced automatic regeneration window.
Note: Move the switch upward for at least 2 seconds, and no more than 60 seconds to force regeneration. An indicator light on the switch will become active showing that the regeneration is active. The HEST lamp will become active showing that the regeneration is active. The high exhaust temperature indicator will deactivate after regeneration is completed or the regeneration has been disabled.
Note: Some OEMs may use other means of activating a forced regeneration such as touch screen interfaces.
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Force Regeneration - Move the switch upward for at least 2 seconds, and no more than 60 seconds to force regeneration. The HEST lamp will become active showing that the regeneration is active. Once the HEST lamp is active, the switch must be returned to the normal position. The high exhaust temperature indicator will deactivate after regeneration is completed or the regeneration has been disabled. |
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Disable Regeneration - Move the three-way switch to the downward position to disable regeneration. |
Note: To re-enable the regeneration, move the three-way switch back in to the middle position.
Soot Level Monitoring and Indicator Lamps
During the normal working cycle of the engine the ECM will control when the regeneration will occur. Operation of the engine is not recommended with the amber warning light flashing, or the red lamp illuminated. Operation of the engine at this level could damage the DPF.
| Lamp Operation | Action Required | ||
| HEST Lamp | On | The ARD is activated and the exhaust temperature is greater than |
None |
| DPF Lamp | On | The lamp provides a general indication of the soot load. The lamp is off when the soot load is normal. The lamp will operate at level 2 and above. | A regeneration is required. In automatic mode the ECM will decide when to allow the regeneration.
If the DPF lamp stays illuminated allow a regeneration without interruption. An uninterrupted regeneration will reset the DPF lamp. |
Some applications will be equipped with a monitoring gauge. Illustration 1 is an example of the levels of soot loading on a gauge.
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| Illustration 1 | g02153650 |
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(1) Normal operation level 1
(2) Level 2 with DPF lamp illuminated (3) level 3 with DPF lamp illuminated. | |
During the normal working cycle of the engine the ECM will control when the regeneration will occur. Regeneration will take place by enhanced automatic regeneration. Operation of the engine at level 3 and not allowing a regeneration to be performed could damage the DFP.
Illustration 2 is a guide to show engine RPM engine load and when regeneration can occur.
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| Illustration 2 | g03193641 |
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(A) Engine load factor
(B) Engine RPM (1) High speed automatic regeneration (60-80% soot load) (2) High speed automatic regeneration (80-100% soot load) | |
In some circumstances high speed regeneration cannot occur. Allow the application to operate at a lower load factor in order to allow regeneration to occur.