SEBU8726-03 57 Operation Section Engine Operation Engine Operation During the time of elevated fuel pressure, the operator may notice a change in the tone of the engine. The ECM will operate the check at low idle for approximately 5 minutes. i04653132 Engine Operation i04690175 Diesel Particulate Filter Regeneration Proper operation and maintenance are key factors in obtaining the maximum life and economy of the engine. If the directions in the Operation and Maintenance Manual are followed, costs can be minimized and engine service life can be maximized.
Regeneration The time that is needed for the engine to reach normal operating temperature can be less than the time taken for a walk-around inspection. Regeneration is the removal of soot from the Diesel Particulate Filter (DPF). There are two different types of DPF that can be installed The through flow DPF and the wall flow DPF. Engines with a power output of 56kW and above will have the wall flow DPF installed. Engines with a power output below 56kW have the option to use both types of DPF. The engine can be operated at the rated rpm after the engine is started and after the engine reaches operating temperature.
The engine will reach normal operating temperature sooner during a low engine speed (rpm) and during a low-power demand. This procedure is more effective than idling the engine at no load. The engine should reach operating temperature in a few minutes. In table 4 titled Indicator Operation the operator will find information on the regeneration indicators. The table informs the operator why an indicator is illuminated and what action should be taken. Avoid excess idling. Excessive idling causes carbon buildup, engine slobber and soot loading of the Diesel Particulate Filter (DPF). Excess idling can be harmful to the engine.
Through Flow DPF Gauge readings should be observed and the data should be recorded frequently while the engine is operating. Comparing the data over time will help to determine normal readings for each gauge. Comparing data over time will also help detect abnormal operating developments. Significant changes in the readings should be investigated. The through flow DPF uses passive regeneration in order to remove the soot from the DPF. Passive regeneration is a chemical reaction within the system. Normal operation of the engine creates enough heat for a chemical reaction in order to regenerate the DPF. The regeneration occurs automatically during normal engine operation.
This system uses an amount of active regeneration in order to ensure that soot cannot exit the DPF. The through flow DPF will not require manual cleaning. System Check For a typical view of the through flow DPF, refer to this Operation and Maintenance Manual, “Sensors and Electrical Components (Aftertreatment)” During normal engine operation the Electronic Control Module (ECM) will elevate the fuel pressure to the injectors. This check will be at scheduled intervals of approximately 100 hours depending on the duty cycle of the engine. The check will be carried out automatically without the need of any input from the operator.
Wall Flow DPF The wall flow DPF uses passive regeneration and active regeneration in order to remove the soot from the DPF. The ash is trapped within the DPF and must be removed by a manual cleaning process. Refer to Operation and Maintenance Manual , “Diesel Particulate Filter- Clean”.