OBJ_DOKU-37427-001.fm Seite 33 Dienstag, 6. August 2013 8:47 08
Operation
Passive regeneration Normal operation Under normal operating conditions (exhaust temperature > 250 °C), the filter contamination with soot remains in a permissible range and no actions are necessary. The regeneration lamp is off. Support mode If the operating conditions of the engine do not permit any passive regeneration, the contamination of the diesel particle filter with soot will increase. A throttle valve controlled via the engine control unit is located in the combustion air inlet. This is used to increase the exhaust gas temperature for regeneration of the diesel particle filter, if this is not reached during normal operation. This can be the case if: ● The engine only has short operating times. ● The engine workload is not high. This process is automatically activated by the engine control unit, the operator does not need to perform any actions. The regeneration lamp is off. During this operating state, an acoustic change occurs to the running of the engine.
Standstill regeneration Temperatures of approx. 600 °C occur on the exhaust pipe during regeneration. A special engine operating state becomes active during standstill regeneration and the machine is not allowed to be used during the active standstill regeneration. Danger of burns! If the support mode does not attain an adequate reduction of the soot contamination, the filter will continue to become contaminated with soot and a standstill regeneration will be necessary. This is displayed by a flashing regeneration lamp. The standstill regeneration must be initiated manually by the operator.
The regeneration lamp lights up continuously.
We recommend carrying out a necessary standstill regeneration as quickly as possible, as otherwise the diesel particle filter will continue to become contaminated with soot.
Using the device during standstill regeneration is prohibited.
If the standstill regeneration is not carried out, the engine control unit will activate the specified engine protection functions, depending on the contamination of the diesel particle filter.
Once the standstill regeneration has been released, the engine automatically increases the speed level.
The regeneration lasts 30 minutes on average. The standstill regeneration can be interrupted at any time by pressing the regeneration button again or by removing the regeneration release.
Every standstill regeneration slightly dilutes the engine oil with fuel. The oil quality is therefore monitored. The request to change the oil must therefore be obeyed.
Using the device during standstill regeneration also leads to it being interrupted.
Implementation of the standstill regeneration
Certain engine faults lead to excessive carbon emission which cannot be seen due to the diesel particle filter.
The engine must be brought into a "safe state" for the regeneration: ● Shut down the engine on an open terrain at a safe distance to flammable objects.
© 2013
● Warm up the engine; the coolant temperature must reach at least 75°C. ● Operate the engine in idling. ● The engine control unit now requires a signal indicating that the unit is safely parked (stationary signal). This occurs,depending on the application, for example by: – Activating the parking brake. – Engaging a specified gear position in the gearbox. ● Operating the release button. Position depends on application, see device manual.
The request for standstill regeneration remains until it is completed without interruption.
In such cases, the diesel particle filter can be loaded very quickly, among other things, to a level which no longer allows a standstill regeneration by the opera-
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