So, it seems the emissions in a tractor are far less intricate than, say in a one ton diesel. Is it just the dpf filter that makes up the emissions on a tractor? The diesel particulate filter traps particles from the combustion of the diesel fuel. So what about the diesel that is injected and ignited in the dpf filter? What happens to those particles from the combustion (regen) cycle downstream and the nox gases it produces? With the diesels on the road they incorporate the dreaded egr valve. It takes exhaust and re-routes it back into the fresh air intake to be sent through the engine to reduce nox levels. Thats like putting a pipe from your *## direct to your mouth and trying to stay healthy.
Anyone ever look inside the intake of a (modern over the road diesel)? I can't understand how this day and age that this is all they got for a solution. Take a very efficient diesel and run its own exhaust through it.