What is exhaust aftertreatment system?
What is exhaust aftertreatment system?
An aftertreatment system is a method or device for reducing harmful exhaust emissions from internal-combustion engines. In other words, it is a device that cleans exhaust gases to ensure the engines meet emission regulations.
What is aftertreatment regeneration?
After the exhaust passes through the DPF, diesel exhaust fluid (DEF) is injected into the system. The DPF’s job is to capture the particulate matter (soot & ash) leaving the engine. Every so often the 1-box needs to burn off this particulate matter and does so in a process called regeneration.
How does SCR aftertreatment work?
An SCR (Selective Catalytic Reduction) system is a system installed on diesel vehicles to reduce harmful Nitrous Oxide (NOx) emissions. It works by injecting an automotive grade urea, or Diesel Exhaust Fluid (DEF) through a specially designed catalyst, into the exhaust stream of a diesel engine.
Can you stop a parked regeneration?
To Cancel a Parked Regeneration hold the DPF Switch to the ON position for five (5) seconds and release. A Parked Regeneration will stop if the key is turned to the off position, the truck is put into gear or the parking brake is released. The regeneration will take approximately 20-40 min.
How long does it take to do a parked regeneration?
How long does a parked DPF regen take? It takes approximately 20-60+ minutes. It will continue to regen until the soot level has reached ‘low’ or ‘0%. ‘ Some trucks will let you monitor your soot level gauge on the dashboard.
What is a ARD head on a CAT engine?
REMANUFACTURED ARD HEAD This Caterpillar Aftertreatment regeneration strategy uses the ARD HEAD (BURNER SYSTEM) to burn particulate matter (or soot) in the diesel particulate filter. This fuel ignites and creates a high enough temperature to burn the soot from the DPF core.
When did caterpillar start using def?
Caterpillar 2007 engine technology—as anticipated—will be based on the ACERT platform with the addition of a diesel particulate filter (DPF) for PM control.
What is aftertreatment on a diesel engine?
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 does active regeneration do on a Caterpillar engine?
Caterpillar uses a proprietary active regeneration technology to maximize reliability and durability of the engine, while the competition adds a costly automatic load bank to the generator set. A DPF is a filtration system designed to reduce PM, including soot from the exhaust of a diesel engine.
How much money does caterpillar make a year?
With 2016 sales and revenues of $38.537 billion, Caterpillar is the world’s leading manufacturer of construction and mining equipment, diesel and natural gas engines, industrial gas turbines and diesel-electric locomotives.
How are engines responding to Tier 4 final?
The latest regulation, Tier 4 Final, effectively requires an aftertreatment system to reduce emissions to compliance levels for all engines. Rental applications are commonly used in low load situations and there are opposing strategies for combining a diesel particulate filter (DPF) with a sophisticated regeneration process to meet these demands.
What should the exhaust temperature be for regeneration?
As backpressure increases, eventually the particulates must be removed from the DPF through a process known as regeneration. Exhaust temperatures are increased to above 575°F to facilitate regeneration of the DPF. Manufacturers differ on the method of achieving these elevated exhaust temperatures.
