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bus crash kills at least 10 after FedEx truck collision
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<blockquote data-quote="White Line" data-source="post: 1311393" data-attributes="member: 52233"><p>Just to make sure we are on the same page MFE, are you talking about the EGR valve itself or the DPF catching on fire? I am only asking because some people confuse DPF (diesel particulate filter) and DEF (diesel exhaust fluid) as the same thing which they are not, and confuse the EGR with the DPF which are not the same thing, the EGR (exhaust gas recirculation) valve is just a electronically controlled valve on the side of the engine block that does exactly what it is called, it takes already burned fuel exhaust and forces it back through the combustion process again, it's actually a horrible set up and plays hell on the engines turbo particularly in the Cummins and the Detroits, now the DPF filter is that muffler looking thing that resembles a catalyst converter which it pretty much is, however unlike a catalyst it does it's burn off and regen by having small amounts of diesel fuel sprayed in it by electronic control, this type of DPF was used from 2007 to 2010, however in 2010 a new DPF was put into the field that uses DEF (diesel exhaust fluid) instead of diesel fuel for its burn off and regen, these new trucks have a DEF tank on them and like diesel fuel the DEF tank must have DEF fluid in it at all times, if it runs out the truck will shut itself down.</p></blockquote><p></p>
[QUOTE="White Line, post: 1311393, member: 52233"] Just to make sure we are on the same page MFE, are you talking about the EGR valve itself or the DPF catching on fire? I am only asking because some people confuse DPF (diesel particulate filter) and DEF (diesel exhaust fluid) as the same thing which they are not, and confuse the EGR with the DPF which are not the same thing, the EGR (exhaust gas recirculation) valve is just a electronically controlled valve on the side of the engine block that does exactly what it is called, it takes already burned fuel exhaust and forces it back through the combustion process again, it's actually a horrible set up and plays hell on the engines turbo particularly in the Cummins and the Detroits, now the DPF filter is that muffler looking thing that resembles a catalyst converter which it pretty much is, however unlike a catalyst it does it's burn off and regen by having small amounts of diesel fuel sprayed in it by electronic control, this type of DPF was used from 2007 to 2010, however in 2010 a new DPF was put into the field that uses DEF (diesel exhaust fluid) instead of diesel fuel for its burn off and regen, these new trucks have a DEF tank on them and like diesel fuel the DEF tank must have DEF fluid in it at all times, if it runs out the truck will shut itself down. [/QUOTE]
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bus crash kills at least 10 after FedEx truck collision
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