What is an aftertreatment system?
What is an aftertreatment system? It is a series of components that cleans the diesel exhaust emitted by the engine prior to releasing it through the tailpipe to the outside air. Its purpose is to reduce the emission of harmful pollutants into the environment.
What is a diesel aftertreatment system?
Dec 22, 2018 · “Heavy duty diesel engine aftertreatment systems were introduced as a solution to aid in reducing both PM and NOx emissions… Generally speaking, the heavy duty diesel engine aftertreatment system has two primary components: the exhaust aftertreatment technology — which includes the diesel oxidation catalyst (DOC) and diesel particulate filter (DPF) — to …
What are the different parts of an engine aftertreatment system?
Feb 13, 2018 · Aftertreatment system maintenance is easier when you stay ahead of the demand. We appear to be learning from our mistakes in aftertreatment system maintenance, but we still have a way to go before ...
How do you maintain your aftertreatment system?
Dec 08, 2017 · These systems treat post-combustion gases after they leave the engine, reducing environmental impact without sacrificing power or performance. Although aftertreatment systems have been used for years now, many fleets continue to struggle with maintaining and repairing these systems.
What is after treatment on a semi truck?
What is an aftertreatment system? It is a series of components that cleans the diesel exhaust emitted by the engine prior to releasing it through the tailpipe to the outside air. Its purpose is to reduce the emission of harmful pollutants into the environment.
What is DOC and DPF?
It is a flow through filter that contains precious metals to start the oxidation of hydrocarbons, carbon monoxide and unburned fuel and oil. Both the DOC and the DPF are honeycomb ceramic filters. However, unlike the DOC, the DPF is a wall-flow filter that traps any remaining soot that the DOC couldn't oxidize.Aug 9, 2017
What does ATS stand for on a semi truck?
automatic transfer switch (ATS)
What is after treatment regeneration?
Truck Engine Regeneration can also be known as "after treatment regeneration" or "regeneration of the after treatment system" and is something that needs to be done for heavy trucks as well as some medium and light duty diesel trucks.
What is SCR in exhaust?
Selective Catalytic Reduction (SCR) is an advanced active emissions control technology system that reduces tailpipe emissions of nitrogen oxides (NOx) down to near-zero levels in newer generation diesel-powered vehicles and equipment.
What is Doc John Deere?
John Deere Power Systems will use a diesel oxidation catalyst (DOC)/diesel particulate filter (DPF) and (EGR) for NOx control.
What is PO in trucking?
Power only trucking is a full truckload capacity solution that occurs when a carrier provides only a driver and a tractor (also known as a “power unit”). In power only trucking, the driver does not bring a trailer, but instead hooks up to and hauls a trailer that is either leased or owned by a 3PL or shipper.
What does F mean in trucking?
F. Flatbed/Van/Reefer.
What does RPM stand for in trucking?
Rate Per MileRPM (Rate Per Mile) Rate Per Mile (RPM) is trucking industry jargon regarding the pricing of a shipment on a per-mile basis.
When should I do a parked regen?
0:242:59Parked Regen GHG17 - Full Training Video - YouTubeYouTubeStart of suggested clipEnd of suggested clipMust be initiated within 30 seconds or the engine will shut down to perform a parked regeneration.MoreMust be initiated within 30 seconds or the engine will shut down to perform a parked regeneration.
What is DPF warmup?
With Automatic DPF, warm-up may happen automatically, without you needing to provide any input, while your truck is idling. Also, if you're idling for extended stretches of time, the truck will increase engine speed periodically, sometimes without notifying you, so it can reduce the need to do a parked regeneration.Jul 15, 2019
Control Technologies for Compression–Ignition Engines
The design requirements for aftertreatment systems depend not only on the exhaust composition, but also on the duty cycle that the emissions test and the end users impose on the engine. The aftertreatment device should function correctly when new and continue to meet emission control requirements over the design life of the engine.
Prospects for marine diesel engine emission control
Masaaki Okubo, Takuya Kuwahara, in New Technologies for Emission Control in Marine Diesel Engines, 2020
Advanced diesel valvetrain system design
Intake or exhaust throttling may reduce air–fuel ratio and increase the exhaust temperature for the aftertreatment system (e.g., DPF regeneration, SCR, LNT). Exhaust throttling generally produces less BSFC penalty than the pre-compressor intake throttling.
Advanced, combined exhaust aftertreatment systems for light-duty diesel engines to meet next emission regulations
Th. Körfer, ... Th. Wittka, in Internal Combustion Engines: Performance, Fuel Economy and Emissions: IMechE, London, 27–28 November 2013, 2013
Operation examples of emission control systems
Masaaki Okubo, Takuya Kuwahara, in New Technologies for Emission Control in Marine Diesel Engines, 2020
Science and Technology in Catalysis 2006
CAE (computer assisted engineering) has become a popular tool for development of both the automotive catalyst and the total after-treatment system. This paper reports on using the CAE approach for modeling the DOC (diesel oxidation catalyst) + CSF (catalyzed soot filter) system. Two cases of modeling are shown here.
Batteries for heavy trucks
J.P. Douady, ... J.F. Sarrau, in Lead-Acid Batteries for Future Automobiles, 2017
What is aftertreatment system?
Aftertreatment Systems 101. As you know, trucks are complex pieces of equipment with many components working together to create an efficient, safe and clean machine. The aftertreatment system, or ATS, is one such important part of the truck. There are some misconceptions about aftertreatment systems, so let’s take a moment to clear them up.
What is the purpose of aftertreatment?
Its purpose is to reduce the emission of harmful pollutants into the environment. Numerous clean air acts and laws have been passed over the years, so aftertreatment systems have continued to evolve.
Can aftertreatment be used in trucking?
Yes and no. Aftertreatment issues are certainly concerns for all owner-operators and trucking companies today. It is a complex system with sophisticated components that, by law, must be working properly at all times. Although ATS issues can cause downtime and expenses, these issues can be reduced with proper maintenance.
Is aftertreatment a truck thing?
It’s a myth that aftertreatment systems are solely a “truck thing.”. The reality is that the aftertreatment systems on commercial vehicles are only slightly different than the system on your own personal vehicle.
What happens if you clean a filter in stage 3?
If they have gone through a stage 3 cleaning, they will have been exposed to some higher level of contamination and there may be some internal damage to the filter. ”. So when it comes to cleaning, if you’re proactive and stay ahead of the need for a stage 2 or stage 3 process, you’ll be time and money ahead.
How long does it take to clean an exchange?
The beauty in using an exchange is the downtime can be cut by a half to a third. It typically takes a couple of days for a proper cleaning procedure, and then you have the disassembly and reassembly and recalibration time. Dropping in an exchange takes a couple of hours.
Primary components
The primary components of a vehicle’s aftertreatment system are the diesel particulate filter system (DPF), which reduces particulates, and the selective catalytic reduction system (SCR), which reduces nitrogen oxide (NOx).
Aftertreatment system maintenance
A DPF collects diesel particulates in the diesel engine’s exhaust. Over time, this filter can become clogged. To ensure that the DPF continues to work effectively, it should be serviced regularly.
Automatic and parked regeneration
Automatic and parked regenerations help clean trapped soot, oil and ash caught in the DPF to help ensure that the filter remains in good working order. These regenerations, or regens, clean the filter in between the manufacturer’s maintenance guidelines.
Conclusion
While aftertreatment systems are often overlooked and neglected in terms of maintenance, these systems are important to the performance of diesel trucks.
How to terminate service regeneration?
The service regeneration can be terminated by applying the brake pedal, turning it off using the scan tool, or by simply disconnecting the scan tool from the vehicle. Diesel exhaust aftertreatment systems have been a reality for more than a decade.
How long does def last?
At room temperature, DEF can be stored for two years. Keep it between -12 degrees C and 32 degrees C and it will last at least a year. Let that temperature rise above 32 C and the DEF shelf-life drops.
What is the reaction of DEF?
DEF is the reactant necessary for the functionality of the SCR system.
What are the components of an engine aftertreatment system?
There are three components to the engine aftertreatment system: the diesel particulate filter (DPF), the diesel oxidation catalyst (DOC), and the selective catalytic reduction (SCR). The DPF has been the main focus of attention when problems come up, but it’s just as important to look at the DOC and SCR to make sure everything in ...
How long does it take to service a Volvo aftertreatment system?
A good example of that is the Volvo aftertreatment system, which has a DPF that can be serviced in around 15 to 20 minutes, whereas a lot of the previous generation systems would take significantly longer. That all leads to more uptime for the vehicle, rather than having it sit in a shop.”. Advertisement.
What happens if you don't evaporate urea?
Boone explained that not completely evaporate the urea is a big problem that leaves a white deposit in the system, which can lead to additional backpressure.
Does aftertreatment reduce emissions?
That increases the gas temperature, and that higher temperature gas enters the DPF and helps to burn off soot.”. Aftertreatment systems have led to a significant reduction in the emissions pouring from the engine.
