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Old February 19th, 2008, 08:33 PM   #13
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Join Date: 01-27-08
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I went to a class about the new emissons systems on the diesel trucks and the exhaust temp inside the particulate filter has to reach temps over 1200 degrees to burn off the soot. The temp out the tail pipe is a little lower but still way too hot. Thats why they have those stupid tips on the tail pipe to let air in to cool it down some. When the truck goes into active regeneration it sprays a small amout of diesel fuel in the cyl when the exhaust valve is open to heat up the particulate filter. Thats one of the reasons these new trucks don't get as good of fuel milage as the older trucks. All of the new emissions and electronics keeps me busy at work so it must be good!
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