Doosan DL06 - Page 141

DL06K Interim Tire-4 Diesel Engine Disassembly and Reassembly of Major Components
139
1) Active regeneration
ECU initiates active regeneration under below conditions. Regeneration
generates heated exhaust gas, and the regeneration caution lamp and
temperature caution lamp turn on to notify the driver. Driver can still maneuver
the machinery or automobile but need caution. The regeneration process
takes 20 to 30 minutes, and the lamps turn off when the process is over.
WARNING :
Turning off the engine when the regeneration is still in process and the lamp
is on can affect DPF critically.
Therefore, the engine is not supposed to be turned off until the process is
completed unless the driver is in immediate danger or emergency happens.
1. Vehicle operating hours : less than 10 hours.
2. Fuel consumption amount : less than 120 liters.
3. The amount of soot collected calculated by ECU simulation reaches certain
level.
2) Forced regeneration
Forced regeneration is a process of regeneration started by the driver when
DPF is not performing regeneration automatically during maneuvering, and the
process is supposed to be started when the vehicle is parked. Forced
regeneration should be initiated by the driver when active regeneration might
not occur under the condition below.
- Repeated operation with light load or low speed driving within a short
distance.
- Frequent idle operation
The timing of driver’s initiative to start forced regeneration
1. Coolant (engine oil) temperature: more than 55 °C
2. Revolution : idle
3. Gear stick : neutral (Wheel loader)
Forced regeneration procedure
1. Park the vehicle. (Due to the raise of the exhaust gas temperature, the
vehicle should be parked in a safe place.)
2. Set the engine revolution at idle.
3. Pull down the safety lever
4. Turn on the forced regeneration switch.