Basler Electric DGC-2020HD - Manual (Page 387)

9469300990 Rev B 377
Exhaust Treatment
Diesel Particulate Filter (DPF)
In order to meet Tier 4 emission requirements, some engine manufacturers are applying Diesel
Particulate Filters (DPF) to the exhaust system of the engine. A Diesel Particulate Filter traps particulate
matter contained in diesel exhaust and prevents it from distributing into the air. The particulate matter is
later burned off during a regeneration process.
The DGC-2020HD communicates DPF control and status information to and from the engine ECU via
J1939 communications in the form of various Parameter Group Numbers (PGN) and Suspect Parameter
Numbers (SPN). These are summarized in the following paragraphs.
Regeneration
Regeneration is accomplished by operating the engine at elevated exhaust temperatures where the
accumulated particulate is burned off. If, in normal operation, the engine can be loaded to a high enough
level to achieve the elevated exhaust temperature, then regeneration can occur as a part of normal
operation. This is known as passive regeneration.
High exhaust temperatures can also be accomplished by methods such as providing dampers in the
exhaust stream or heating the exhaust through the burning of fuel. This is known as active regeneration
since it is outside of normal engine operation.
Heavily loaded engines will seldom require active regeneration. A lightly loaded engine will likely undergo
active regeneration when regeneration is required.
DPF Control
DPF control information is sent from the DGC-2020HD to the Engine ECU through PGN Number 57244
(0xE000). A manual regeneration request is sent using SPN 3696, Diesel Particulate Filter Regeneration
Force Switch. Regeneration can be inhibited by SPN 3695, Diesel Particulate Filter Regeneration Inhibit
Switch.
Manual Regeneration
The operator can force a regeneration cycle by turning on the Manual Regeneration setting found on the
front panel under Settings > Communication > CANbus Setup > ECU Setup > DPF Regenerate Setup.
The parameter will remain on for a few seconds then go off. The ECU will respond to the momentary
setting by logging the request to force a manual regeneration. A continuous request is not used because
this can be problematic for some engine ECUs.
Manual regeneration can also be initiated by clicking the Manual Regeneration button on the ECU Setup
screen in BESTCOMSPlus
® . BESTlogic
™Plus programmable logic can also be used to initiate manual
regeneration by setting the DPF Manual Regeneration (DPFMANREGEN) logic element true.
Regeneration Inhibit
The operator can inhibit regeneration by turning on the DPF Regeneration Disable setting found on the
ECU Setup screen in BESTCOMSPlus.
Regeneration can also be disabled by turning on the Disable Regeneration setting on the ECU Setup
screen in BESTCOMSPlus.
BESTlogicPlus programmable logic can also be used to inhibit regeneration by setting the DPF
Regeneration Inhibit (DPFREGENINHIBIT) logic element true.
DGC-2020HD Exhaust Treatment