soot filters


Senior Member
Hello there,

I'm translating a technical text about soot filters (absolutely compelling ;-))
The German text describe a soot filter that helps absorb considerable amounts of soot particles after the launch of the engine (you know, the black cloud that forms after you start a Diesel engine).

So how do you say that in English?

Starting soot filter? Starting-time soot filter? Launch soot filter? Engine-launch soot filter?

I find all of them awful and count on you! My technical dictionaries let me down with this one so please help me!

Thanks a million in advance
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