Motoring: Here is how a diesel particulate filter works

Technical Editor at CAR Magazine, Nicol Louw joined Azania to talk about diesel particulate filters (DPF) in the exhaust systems of some vehicles.

The function of a DPF is to catch the soot and clean up the exhaust gasses but there are some facts surrounding its operation that may be useful for the public to know.

Here is what Louw had to say.

We actually do not require these filters in our vehicles, but when we import some of the vehicles from Europe, sometimes the option for the manufacturer is to delete this filter, sometimes not, so many of the high-end vehicles will come with the particular filter to the country.

Nicol Louw, Technical Editor at CAR Magazine

It is actually like a brick that sits in a can in the exhaust, the idea is it catches the soot particles as exhaust gas flows through it and it has got a sensor that measures the pressure differential across the filter to determine how full it is. When it gets to the stage where it is fairly full, the engine control unit will increase the exhaust temperature and this will burn off the soot in the filter.

Nicol Louw, Technical Editor at CAR Magazine

Click on the link below to listen to hear more from Louw...


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