Adverse health effects have been linked to harmful particulate matter found in diesel emissions. The carcinogenic components can cause asthma, respiratory distress and cardiovascular issues. The most harmful of these particles are less than 10 microns in size, and are able to get into the deepest regions of the human respiratory system.
The DPF is designed to remove particulate matter (soot) from the exhaust. A DPF is a device installed in diesel engines made after Jan. 1, 2007 in response to more stringent emission regulations. In vehicles with a DPF, exhaust flows through an open inlet channel and is restricted at the plugged end, where it is forced through porous walls that trap soot. The exhaust then passes through the wall and out of the adjacent cell where the outlet end is open.
While the DPFs do their job in removing particulate matter, the soot will simply continue to build up. Whilst most vehicles have active on-board regeneration processes, these are not 100% effective and overtime you may notice the requirement for active or passive ‘regens’ becoming more frequent. This is a sure sign that it’s time to service your DPF.