HumbleSmoker
banned, trolling, using aliases
You know, I've been struggling to understand this system.
As far as I can dig out the catalysed DOC precedes the catalysed DPF and it is used to convert NOx to NO2. Soot combusts with NO2 reliably at temperatures around 300 to 450C at ratios of 8:1, NO2/Soot. NO2 is converted in this process back to NOx and continues the process until expelled from the DPF.
This is supposed to work on trucks which run in high load more than passenger cars where it only works part of the time. I guess it would work pretty well on race cars because of high heat and load. That, as near as I can see, is how passive regeneration works, which is also know as "CRT" "Continuous Regenerating Trap".
As far as I can dig out the catalysed DOC precedes the catalysed DPF and it is used to convert NOx to NO2. Soot combusts with NO2 reliably at temperatures around 300 to 450C at ratios of 8:1, NO2/Soot. NO2 is converted in this process back to NOx and continues the process until expelled from the DPF.
This is supposed to work on trucks which run in high load more than passenger cars where it only works part of the time. I guess it would work pretty well on race cars because of high heat and load. That, as near as I can see, is how passive regeneration works, which is also know as "CRT" "Continuous Regenerating Trap".