RENAULT - BOSCH MD1CS006

DPF / ADV REMOVAL

DPF (Diesel Particulate Filter)

It is a filter added to the exhaust system in order to remove or reduce Particulate Matter that naturally occurs as a result of combustion in diesel engines.

Increasing back pressure is absolutely undesirable, especially in terms of engine performance and fuel consumption. This situation, that is, the clogging level of the DPF, is constantly monitored by the DPF's inlet and outlet pressure difference and temperature sensors. When the sensors detect that the DPF has reached a certain clogging point, the engine control unit increases the exhaust gas temperature with the help of additional fuel injections (considering a single injection time, after-injections made after the preliminary and main injections). In this way, it aims to burn the particles and remove them from the DPF. This process is called "Regeneration" process.

FUNCTION OF DPF (Diesel Particulate Filter)

1. Particle Filter:

DPF has a filter structure through which exhaust gases pass. This structure traps particles and keeps them in the filter while allowing gases to pass.

2. Regeneration:

Over time, the DPF fills with the particles it traps and becomes clogged. To prevent this situation, regeneration, which is the self-cleaning process of the DPF, is performed. Regeneration is the process of burning the soot accumulated in the filter at high temperatures and converting it into CO2 and water vapor.

Passive Regeneration: It occurs with the natural heat of the exhaust gases while the engine is running.
Active Regeneration: The engine control unit (ECU) initiates regeneration by increasing the temperature of the exhaust gases when necessary. This can be done using fuel injection or a heater.

3. Physical and Chemical Structure:

DPF is usually made from high temperature resistant materials such as silicon carbide or cordierite. Its internal structure consists of numerous small channels and pores, thanks to which particles are trapped and gases can pass freely.