how does a Diesel Particle Filter work in a car engine? Isn’t it pointless if it dumps the “particles” anyway?
In: Engineering
They do not just dump the particles. Some filters are single-use and need to be replaced when full. Others are designed to burn off the particle either passively through the use of a catalyst. Some have a cleaning cycle that runs the engine in a way that increases exhaust temperature, sometimes with fuel injected into the exhaust. At a higher temperature, the particle will combust.
What the filter captures is stuff that is not completely combusted, it will be completely combusted when it leaves the filter. That is for non-single-use variants.
It is a bit like asking why a catalytic converter in a car works. It just releases everything out the other end. The key to the function is not in the same form when it enters and exits the catalytic converter. Stuff that is not completely combusted gets completely combusted in the converter.
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