How is soot calculated?
The measurement of differential pressure (∆P) is a conventional and still the most-widely used technology for estimating soot mass in a DPF. A ∆P sensor measures the DPF pressure drop, which is the difference in the exhaust gas static pressure upstream and downstream of the DPF.
What is a normal DPF soot load?
The engine controller reports the DPF soot load as a value from 0% to 250% — not 0% to 100% as you may expect. The value may fluctuate, and this is normal.
How many grams of soot can a DPF hold?
In other words, the amount of ash equals the amount of soot at the maximum allowable soot load limit of 6 g/L. Further, after 150,000 miles (241,000 km) of operation—equivalent to the minimum EPA ash cleaning interval—ash comprises over 80% of the material trapped in the DPF, with the minority being soot.
What is major content of soot?
A major component of soot is black carbon which absorbs more light than any other form of particulate matter. Black carbon can absorb 1 million times more energy than the same mass of carbon dioxide.
What is soot level high?
The high soot level just means it is requesting a regen, it probably won’t finish a regen because of the EGR fault. The only time the DPF needs replaced or baked is if there is an Ash Clean Request.
What happens to the soot in a DPF?
Soot is normally removed from the DPF through regeneration, which burns off the soot, leaving the ash behind. Ash, on the other hand, by definition is incombustible and must be removed from the DPF through some type of cleaning process.
What are the components of soot?
Soot consists of variable quantities of carbonaceous and inorganic solids together with absorbed and occluded tars and resins. Notes: Soot is generally formed as an unwanted by-product of incomplete combustion or pyrolysis. Soot generated within flames consists essentially of aggregates of spheres of carbon.
How to calculate soot mass in a VCD?
Cheers. Anyone? Then scroll down the list on the right hand window and select soot mass calculated and soot mass measured. Hi, Thanks for that. Got the info needed.:cheers:
Where can I find a graph of soot level?
Graph taken from an old VW self study program giving an idea of soot level behaviour: Location: Picardie France and sometimes Sussex. Model: Yeti 4×4 Outdoor. CFHF engine. Category S insurance write off rebuild.
Is it normal to have two soot values?
The distance between regens can vary greatly on driving conditions and engine health, anything between 150-400 miles is probably normal. There should be two soot values, calculated and measured. It’s normal from them to differ as I don’t believe calculated takes into account passive regeneration.
How many soot values should a car have?
There should be two soot values, calculated and measured. It’s normal from them to differ as I don’t believe calculated takes into account passive regeneration. They are generally less important assuming they don’t get high enough to block the DPF as the car should be able to perform a regeneration and burn it off.