Why does my DPF get dirty?

The particulate clean out, typically called the DPF, is installation one after the alternative from the engine block within the equal location because the catalytic converter. The DPF is liable for putting off diesel particulate rely (or soot) from the exhaust gas of a diesel engine. In order to regenerate the filter, it is constantly gathering soot, carbon deposits want to be burned off with the aid of growing the temperature of the exhaust gasoline on the inlet of the clear out.

During regeneration, the temperature of the exhaust gas may be regulated exactly. clean dpf The transmitter informs the engine manipulate unit (ECU) of the exhaust gas temperature. It is as a result viable to calculate exactly the quantity of post-injection gas required to increase the temperature of exhaust fuel in the path of the regeneration section.

In instances of predominantly city use, the temperature of the exhaust fuel fails to attain sufficient temperatures to collect passive regeneration. Consequently, soot particles aren’t removed and as a substitute collect inside the clean out. When a clogging threshold is reached (18 grams), the engine’s laptop will purpose energetic regeneration.

The degree of carbon accumulation within the DPF is calculated the use of  fashions programmed within the ECU:

A model based totally at the reason pressure profile, which calculates saturation in keeping with a particular pattern of signals coming from the temperature transmitters of the exhaust gas as well as the oxygen sensor.

A version primarily based at the flow resistance of the DPF, which calculates saturation in line with alerts reassembled with the aid of the differential stress sensor, temperature transmitters, and air glide meter, which then all tell the ECU of the degree of saturation inside the DPF.

What is dpf?

The stress sensor measures the difference in stress most of the inlet and the hole of the DPF, the distinction in pressure similar to the diploma of saturation within the clear out. The extra the filter is clogged, the better the voltage (in volts) transmitted thru the sensor to the ECU. At a selected voltage, orresponding to the amount of carbon particles (grams), the ECU will activate compelled regeneration of the DPF by using the usage of raising the temperature of the exhaust gasoline to 1020°F/1200°F.