What is the DOC on a DPF?
The DOC forces the exhaust over a honeycomb ceramic structure coated with a catalyst that chemically changes carbon monoxide and hydrocarbons to carbon dioxide and water. From there, the exhaust gases go through the DPF where it is forced through porous channel walls, trapping and holding the remaining ash and soot.
What is a doc on a diesel engine?
Diesel Oxidation Catalysts, also known as DOCs, are. exhaust aftertreatment devices that reduce emissions. from diesel fueled vehicles and equipment.
What is a doc on a truck?
A diesel oxidation catalyst (DOC) is an aftertreatment component that is designed to convert carbon monoxide (CO) and hydrocarbons into carbon dioxide (CO2) and water. It breaks down pollutants in the exhaust stream from a diesel engine, helping to reduce particulate matter (PM).
What is a doc on a Cummins?
Diesel Particulate Filter. Cummins Emission Solutions’ DPF is coupled with a Diesel Oxidation Catalyst (DOC). DEF converts to ammonia in the exhaust stream, and reacts with NOx over a catalyst to form harmless nitrogen gas and water.
How much is my DPF worth?
Depending on PGM content, a scrap DPF omay be worth anywhere from $20 to $700. The exact cost will depend on certain other factors as well such as general market prices at the time the failed DPF is sold and the model of the DPF. Other valuable metals used in DPF manufacturing include palladium and rhodium.
Are used DPF worth anything?
DPF and DOC systems are catalyzed with platinum group metals which is a valuable commodity to recycling companies. Therefore, a DPF filter scrap value can be fairly lucrative. Depending on PGM content, a scrap DPF omay be worth anywhere from $20 to $700.
What’s the difference between the DPF and the Doc?
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. The soot remains in the DPF until it is regenerated either passively or actively.
What does DPF stand for in diesel engine?
To reduce its impact, automotive engineers developed DPF to conform to the stricter Euro-6 emission standard. The term DPF stands for Diesel Particulate Filter. It is used in the diesel engine that is Euro-6 emission compliant. The manufacturers use the Diesel Particulate Filter to filter,…
What happens when the DPF is removed for cleaning?
When the DPF is removed for cleaning it is always a good practice to also remove the DOC and clean it as well if necessary. The last component in the after treatment system is a flow through SCR catalyst which introduces Diesel Emissions Fluid (DEF) to the process.
How does the temperature sensor work in a DPF?
The temperature sensor upstream of DPF detects the temperature of the exhaust before it enters the DPF. The integral NTC resistor changes its electrical resistance according to the exhaust temperature and then sends a corresponding voltage signal to the CDI control unit.