Hoffman Estates Fire Department Apparatus Exhaust Regeneration

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Questions and Answers

What should you do immediately after the DPF lamp warning appears?

Park the apparatus on an asphalt surface
Record the event in a logbook
Turn off the engine and wait for morning
Initiate the regeneration process (correct)

Why should you not perform regeneration while attached to the Plymovent exhaust extraction systems?

The apparatus computer will not time stamp the process
The system will interfere with the regeneration process
The hoses are not designed for high exhaust temperatures (correct)
The road cones will not provide a safe zone

What is the primary role of the driver/operator during the regeneration process?

To interrupt the process if the apparatus is needed for an incident
To ensure the apparatus is parked on an asphalt surface
To monitor the apparatus during the entire process (correct)
To record the process in a logbook

What should you do if you need to interrupt the regeneration process?

Let the process complete then restart if necessary (C) Signup and view all the answers

Why should you park the apparatus on a concrete surface during the regeneration process?

To prevent damage to the asphalt surface (B) Signup and view all the answers

What is the purpose of placing road cones around the apparatus during the regeneration process?

To provide a safe zone around the apparatus (B) Signup and view all the answers

How long does the regeneration process typically take on a Pierce, International, or Ferrara apparatus?

Approximately 15 minutes (A) Signup and view all the answers

Why should you exercise caution when approaching the apparatus on the exhaust side during the regeneration process?

Due to high exhaust temperatures (C) Signup and view all the answers

If a regeneration process is interrupted, what will happen to the DPF lamp?

It will remain illuminated until the regeneration is completed. (B) Signup and view all the answers

How do you initiate a parked regeneration process?

Press and hold the odometer reset stem counterclockwise for 3 seconds. (B) Signup and view all the answers

What are the signs that a regeneration process is in progress?

Engine speed increases, engine cooling fan sound increases, and the dash will indicate that a cleaning is in progress. (D) Signup and view all the answers

What is the function of the Diesel Particulate Filter (DPF)?

To reduce the amount of particulate matter in the exhaust. (C) Signup and view all the answers

What is the purpose of the parked regeneration process?

To clean the exhaust filter when the vehicle is not in use. (C) Signup and view all the answers

How long should you hold the exhaust brake switch during a parked regeneration process?

3 seconds (D) Signup and view all the answers

What does it mean when the DPF lamp flashes on for one second during a parked regeneration cancellation?

The regeneration process has been successfully cancelled. (B) Signup and view all the answers

What is the difference between automatic regeneration and parked regeneration?

Automatic regeneration occurs while driving, while parked regeneration occurs while the vehicle is stationary. (D) Signup and view all the answers

What indication shows that the particulate mass is excessive in the Ferrara vehicle?

A yellow dash light (B) Signup and view all the answers

What action is expected from the driver when the High Exhaust Temperature message appears in the Ferrara vehicle?

No action is needed (D) Signup and view all the answers

What process does the vehicle's computer initiate when particulate mass is excessive?

Increasing the exhaust temperature (D) Signup and view all the answers

How can the Chevy / Duramax driver respond in cases other than high exhaust temperatures?

Depress the brake pedal (A) Signup and view all the answers

What is true regarding emergency vehicles and the apparatus mentioned in the document?

They do not need to be taken out of service (A) Signup and view all the answers

Where can you find more information regarding the Heavy-Duty Highway Program mentioned?

At the EPA website (C) Signup and view all the answers

What is the main purpose of the standard operating guideline concerning apparatus exhaust regeneration?

To understand modern diesel engines and comply with EPA exhaust regulations (C) Signup and view all the answers

Which type of regeneration uses additional fuel to super heat the particulate filter?

Active Regen (A) Signup and view all the answers

What system is used in diesel engines after 2010 to assist in burning off pollutants?

Selective Catalytic Reduction (SCR) system (C) Signup and view all the answers

What is one of the key indicators that an apparatus may require exhaust regeneration?

Dashboard warning lights related to exhaust systems (D) Signup and view all the answers

Which of the following describes 'Filter Regeneration'?

The removal of particulate matter from the Diesel Particulate Filter (C) Signup and view all the answers

What distinguishes Forced/Parked Regen from the other types of regeneration?

It is performed while the vehicle is stationary and idling (A) Signup and view all the answers

Who approved the standard operating guideline regarding apparatus exhaust regeneration?

Alan Wax, Fire Chief (D) Signup and view all the answers

When is it determined that apparatus equipped with regeneration exhaust systems should be cycled?

On an as-needed basis (A) Signup and view all the answers

Study Notes

Apparatus Exhaust Regeneration

The purpose of this guideline is to understand modern diesel engines and exhaust systems used in the fire department, complying with EPA standards.
Filter regeneration is the process of removing particulate matter (soot) and combusted diesel fuel byproducts from a Diesel Particulate Filter (DPF) within the exhaust system.

Types of Regeneration

There are three types of regeneration: Active Regen, Passive Regen, and Forced/Parked Regen.

Forced/Parked Regeneration

Forced regeneration uses additional fuel to superheat the particulate filter and burn off trapped soot and particles, developing high temperatures in and around the exhaust system.
Models equipped with a DPF (after 2010) also have a Selective Catalytic Reduction (SCR) system, which injects Diesel Exhaust Fluid (DEF) to clean exhaust and aid the DPF in burning off pollutants.

Dashboard Lights and Warnings

Dashboard lights and warning messages indicate the need for regeneration, typically near the driver's position.

Policy and Procedure

Apparatus equipped with regeneration exhaust systems will be cycled on an as-needed basis.
The regeneration process should be initiated as soon as feasible, preferably during the next morning checkout.
To complete the regeneration process:
- Place the apparatus outside on a concrete surface.
- Place road cones around the apparatus.
- Close all apparatus doors.
- Monitor the apparatus during the entire process.
- Return all equipment after completion.
Note: Do not perform regeneration while attached to the Plymovent exhaust extraction systems, and use caution when approaching the apparatus due to high exhaust temperatures.

Initiating Regeneration by Manufacturer

Pierce: Depress the regeneration button to initiate the process (approximately 15 minutes).
International: Follow steps 1-5, then toggle the regeneration switch to ON for five seconds.
Ferrara: The vehicle's computer will begin to increase the exhaust temperature to burn off particulate mass; no driver action is needed.
Chevy / Duramax: Complete steps 1-5, then find the Exhaust Filter menu, accept safety precautions, and hold the odometer reset stem for 3 seconds.

Aborting Regeneration

Pierce: Toggle the regeneration switch to ON for five seconds to cancel parked regeneration.
International: Press the PARKD REGEN position of the ON/PARKD REGEN switch.
Ferrara: Not applicable, as the vehicle's computer controls the regeneration process.
Chevy / Duramax: Depress the brake pedal to cancel parked regeneration.

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Description

Standard Operating Guidelines for apparatus exhaust regeneration in the Hoffman Estates Fire Department, effective January 1, 2022. Learn about the equipment guidelines and safety protocols.