6.7 Cummins Non DEF vs Newer DEF Trucks
Hi, I used to have a 2008 6.7 CTD 4x4 which towed great but the fuel economy sucked and I know many folks had issues with the first era of emmissions "bluetec" trucks. Last week I picked up a new 201...
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I will give a readers digest short version of what happens
lower combustion temps = retarded injection timing ,less NOX, more soot ,more fuel needed for the same power output, more fuel used because of more frequent regens and no DEF.
higher combustion temps = advanced injection timing ,more NOX, less soot, less fuel needed for the same power, less fuel used because of less frequent regens , and DEF is needed
the SCR breaks the DEF down and it combines with the NOX to make nitrogen, water and CO2
spend a week with the EPA and engine manufactures and you will be bored out of your gourd
lower combustion temps = retarded injection timing ,less NOX, more soot ,more fuel needed for the same power output, more fuel used because of more frequent regens and no DEF.
higher combustion temps = advanced injection timing ,more NOX, less soot, less fuel needed for the same power, less fuel used because of less frequent regens , and DEF is needed
the SCR breaks the DEF down and it combines with the NOX to make nitrogen, water and CO2
spend a week with the EPA and engine manufactures and you will be bored out of your gourd
