HomeMy WebLinkAbout310.007 - Diesel Particulate Filtration System (REGEN) ProcessEffective Date: July 2021 Robert J. Garcia, Engineer
Current Revision Date: 07/05/2023 Section 310.007
Next Revision (1) Date: 07/05/2028 Page 1 of 5
Fresno City Fire Department
300 Training and Equipment Manual
SECTION 310.007 DIESEL PARTICULATE FILTRATION SYSTEM
(REGEN) PROCESS
PURPOSE
The purpose of this policy is to provide an outline of the regeneration (Regen) for the
Diesel Particulate Filtration System (DPFS) used by the Fresno Fire Department (FFD
or Department).
APPLICATION
Lamps alert the driver when regeneration is needed.
OPERATIONAL POLICY
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OPERATIONAL GUIDELINE
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PROCESS
How To Perform a Parked (Stationary) Regeneration:
If the apparatus DPFS Lamp is illuminated or flashing perform the following steps:
1. Park vehicle in an appropriate location, set parking brake and place
transmission in Neutral, and allow up to one hour for the regen.
2. Set up a safe exhaust area. Confirm that nothing is on or near the
exhaust system surfaces.
3. Ensure that the fast-idle and power take-off (PTO) switches are off
before starting the regen.
4. Push the Manual Regen Switch to begin a parked regen.
Effective Date: July 2021 Robert J. Garcia, Engineer
Current Revision Date: 7/05/2023 Section 310.007
Next Revision (1) Date: 7/05/2028 Page 2 of 5
Note: Engine speed increases, and there may be a noticeable
change to the sound of the turbocharger during the regen
process. Once the DPFS is regenerated, the engine
automatically returns to the normal idle speed.
5. Monitor the vehicle and surrounding area during regen. If any unsafe
condition occurs, shut off the engine immediately. To stop parking,
regen, depress the brake, or throttle pedal.
6. Once regeneration is complete, exhaust gas and exhaust surface
temperature remain elevated for three to five minutes.
7. Reference your Spartan Operations and Service Manual for further
information.
Note: If a call for service is received during the regen process the
regen can stop when the parking brake is released or
service brake is depressed. If a regen is still required as
indicated by an illuminated or flashing DPFS lamp, then
continue the regen when you arrive back at the station.
INFORMATION
The DPFS is an integral component of the after-treatment system on vehicles
equipped with EPA 2007 and newer engines. It captures Particulate Matter (PM) in a
wall-flow ceramic filter. The exhaust system periodically undergoes regeneration,
raising temperatures to oxidize captured PM and clean the system.
After-treatment Diesel Particulate Filter (DPFS) Lamp:
Illuminated
(Figure 1)
DEFINITIONS
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Effective Date: July 2021 Robert J. Garcia, Engineer
Current Revision Date: 7/05/2023 Section 310.007
Next Revision (1) Date: 7/05/2028 Page 3 of 5
The After-treatment DPFS Lamp indicates, when illuminated or flashing, that the After-
treatment DPFS requires regeneration.
This is accomplished by the following:
• If the vehicle is equipped with a Regeneration Inhibit Switch, ensure
that the switch is not in the Inhibit position.
• Perform a DPFS regeneration by performing a parked regen.
Flashing
(Figure 2)
If a regeneration of the DPFS is not performed in a timely manner after the DPFS
Lamp is illuminated, the Lamp begins to flash. This indicates a higher level of
particulate matter in the DPFS Lamp.
Flashing With a Check Engine Lamp/Amber Warning Lamp
(Figures 3 and 4)
A flashing DPFS Lamp combined with an illuminated Check Engine Lamp/Amber
Warning Lamp indicates that the after-treatment DPFS needs regeneration
immediately. A parked regeneration is required.
Effective Date: July 2021 Robert J. Garcia, Engineer
Current Revision Date: 7/05/2023 Section 310.007
Next Revision (1) Date: 7/05/2028 Page 4 of 5
Stop Engine Lamp
(Figure 5)
If a parked regeneration is not performed, the red Stop Engine Lamp should illuminate.
As soon as it is safe to do so, the vehicle should be stopped. Apparatus should be
placed out of service and proper notifications should be made.
Note: Cummins engines calibrated for emergency vehicle use are
programmed to not reduce power or speed due to soot load.
However, excessive soot load may impact engine performance.
High Exhaust System Temperature (HEST) Lamp
(Figure 6)
The HEST Lamp illuminates to indicate that high exhaust temperatures may exist due
to after-treatment regeneration. This is normal and does not signify the need for any
kind of vehicle service or engine service. When this lamp is illuminated, ensure that
the exhaust pipe outlet is not directed at any combustible surface or material.
Reference your Cummins Owner’s Manual for complete instructions.
Regeneration Inhibit Switch
(Figure 7)
Effective Date: July 2021 Robert J. Garcia, Engineer
Current Revision Date: 7/05/2023 Section 310.007
Next Revision (1) Date: 7/05/2028 Page 5 of 5
The purpose of this switch is to prevent or disable active after-treatment DPFS
regeneration. Reference the vehicle Owner’s Manual for complete operation and use
of this switch. Unnecessary or excessive use of the Regeneration Inhibit Switch can
result in a loss of fuel economy, or an increased need for parked regeneration.
DEFINITION
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CROSS REFERENCES
https://s3.amazonaws.com/tsresources.targetsolutions.com/FF8ED1DB-36A2-2C78-
68A5-6075E56D8D0F.pdf
Spartan Operations and Service Manual