How does the DPF work?
The cordierite filter substrate is formed in a honey comb design; alternating inlet cells are open on one end and plugged at the outlet end. As the exhaust flow enters the open inlet cells, it is forced to pass through the micro-porous walls to the outlet cells, filtering the diesel particulate from the exhaust.
The filter substrate is coated with a proprietary catalytic layer to reduce soot combustion temperatures to a level within the normal temperature range. DPF displays regeneration balance points between 380°C and 425°C varying with both vehicle engine and application. Continuous passive filter regeneration occurs during a vehicle duty cycle when the exhaust temperatures are above 400°C for more than 25°/o of the time.
DPF Performance
The DPF is a catalyzed diesel particulate filter which typically reduces diesel particulate (PM) by > 85°/o.
