To talk about the importance of a DPF, you first need to discuss the EPA and the limits they set. The EPA sets pollution limits for every State. One of their focuses was on diesel engine exhaust. Starting in 2003 they set a goal for diesel engine manufacturers to reach which was 0.2 g/bhp-hr by 2010. The first step was E.G.R. (Exhaust Gas Recirculation), which was implemented in 2003 and 2006 engines. What this does is recirculate some of the exhaust back into the cylinders for a second time.
EGR and The Importance of a DPF
Starting in 2007 the DPF was introduced as part of the EGR system. The filter will take what the EGR does not catch such as black carbon and traps the particulates on the filter’s surface. EGR with the DPF would help trucks meet the EPAs requirements. The DPF usually has a honeycomb design and airflow is forced into the filter that will then trap most of the particulates. Also, the DPF can turn soot into ash in two different ways before needing to be cleaned.
The first step is the exhaust passes through a DOC (Diesel Oxidation Catalyst) before it goes into the filter. The second way is accumulated soot is turned into ash by using extra fuel ignited from an injector to make the temperature of the DOC higher. By doing this the soot is changed to ash.
When to Clean A DPF
Manufacturers suggest you should get your DPF cleaned every 350,000 miles. Actually, this may vary from engine to engine. When it comes to cleaning your DPF, hire experts like SouthPOINTE Radiator. SouthPOINTE can have your DPF looking like new quickly and easily. Having your DPF cleaned instead of replaced can save you thousands of dollars.