What the meanig of «DPF (Diesel Particulate Filter)»?
DPF is an abbreviation for Diesel Particulate Filter. This filter removes particulate matter from the exhaust gases of diesel cars. It is the particulate matter that is responsible for the black smoke that contains the exhaust gases, as well as polluting the air, which is a concern for human health. Therefore, the fitting of modern diesel vehicles with particulate filters is due to the implementation of the requirements for the environmental emission standards of diesel vehicles.
DPF is a diesel engine exhaust aftertreatment device that captures particulate soot. Soot is produced when diesel engines do not fully burn fuel, but the DPF captures this soot to prevent the emission of harmful substances into the environment.
A particulate filter is a special volumetric ceramic matrix punctuated by a large number of small-diameter, parallel channels, closed in a staggered pattern on one side. The particulate filter is located next to the catalytic converter in the engine exhaust system and is usually combined with it in the same design. When the engine is running, exhaust gases pass through the porous ceramic walls of the filter, which traps and accumulates particulate matter. Once the DPF has captured the soot, it retains it until the engine reaches a high enough temperature to burn the excess soot into ash, this is called regeneration.
During operation of a diesel engine, a small portion of the engine oil is also burned in addition to the fuel, but its residue in the form of ash causes additional clogging of the DPF and reduces its life expectancy. Therefore, for lubricating a DPF engine, special oils, which produce a minimum amount of ash after combustion, must be used. This reduces the total amount of ash produced by the combustion of fuel and oil and reduces the load on the DPF. The use of quality fuel and low-ash engine oils with special properties will significantly extend the service life of the particulate filter, which is an urgent issue due to its high cost.
To select the right engine oil for a diesel engine with DPF, it is important to follow the recommendations of the car or engine manufacturer. In their recommendations, manufacturers specify the type of engine oil required according to their internal classifications or international classifications, such as ACEA and API.
According to ACEA, the following oil classes are recommended for diesel engines in cars and light trucks equipped with particulate filters: ACEA C1/C2/C3/C4/C5/C6.
According to ACEA the following oil classes are recommended for diesel truck engines equipped with particulate filters: ACEA E6/E8/E9/E11.
According to API the following oil classes are recommended for diesel engines equipped with particulate filters: API CK-4/CJ-4.