Function of the DPF
The main function of the DPF is to filter and retain all the solid polluting particles that are generated inside a diesel engine. These particles are known as carbon, and they are some chemical compounds, specifically hydrocarbon chains, that have not been burned during combustion.
The vast majority of the time the function of the DPF is limited to trapping the particles, but there comes a time when this filter becomes saturated. It is then that an order is sent for the engine to briefly increase fuel consumption and cause the exhaust gases to come out at a higher temperature, which causes the incineration of the particles retained in the filter.