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rv:diesel [2024/01/02 18:41]
princess_fluffypants [Exhaust Soot] 		rv:diesel [2024/07/29 22:39] (current)
princess_fluffypants [Oxides of Nitrogen]
Line 38: Line 38:
 Unfortunately trying to build a cooler that can withstand 2,200 degree gasses and 200 degree coolant right next to each other has been an engineering nightmare - they are typically made of stainless steel, but over time the coolers inevitably crack and/or plug up.  This is a problem with //all// modern diesel engines, on everything from little VW’s to giant semi-truck Cummins ISX engines. When they crack, they result in water squirting into the engine intake which can cause internal engine damage due to the increased pressure when coolant turns to steam. Also, it’s generally a ton of work to change the EGR cooler because of its location, especially in V8 diesels. They also plug up easily because cooling exhaust causes the soot to drop out of suspension and collect everywhere. Unfortunately trying to build a cooler that can withstand 2,200 degree gasses and 200 degree coolant right next to each other has been an engineering nightmare - they are typically made of stainless steel, but over time the coolers inevitably crack and/or plug up.  This is a problem with //all// modern diesel engines, on everything from little VW’s to giant semi-truck Cummins ISX engines. When they crack, they result in water squirting into the engine intake which can cause internal engine damage due to the increased pressure when coolant turns to steam. Also, it’s generally a ton of work to change the EGR cooler because of its location, especially in V8 diesels. They also plug up easily because cooling exhaust causes the soot to drop out of suspension and collect everywhere.
  
-Adding [[https://en.wikipedia.org/wiki/Diesel_exhaust_fluid|DEF]]/[[https://en.wikipedia.org/wiki/Selective_catalytic_reduction|SCR]] helps a lot, but using too much [[https://en.wikipedia.org/wiki/Diesel_exhaust_fluid|DEF]] is considered a bad thing because of the hassle and expense. This is one of the things that happened after [[https://en.wikipedia.org/wiki/Volkswagen_emissions_scandal|Dieselgate]] with the VW’s - the ‘fixed’ cars now use 3 times as much [[https://en.wikipedia.org/wiki/Diesel_exhaust_fluid|DEF]].+Adding [[https://en.wikipedia.org/wiki/Diesel_exhaust_fluid|DEF]]/[[https://en.wikipedia.org/wiki/Selective_catalytic_reduction|SCR]] helps a lot, but using too much [[https://en.wikipedia.org/wiki/Diesel_exhaust_fluid|DEF]] is considered a bad thing (because of the hassle and expense) so manufacturers almost never use enough. This is one of the things that changed after [[https://en.wikipedia.org/wiki/Volkswagen_emissions_scandal|Dieselgate]] with the VW’s - the ‘fixed’ cars now use 3 times as much [[https://en.wikipedia.org/wiki/Diesel_exhaust_fluid|DEF]].
  
 ===== Exhaust Soot ===== ===== Exhaust Soot =====
rv/diesel.1704238861.txt.gz · Last modified: 2024/01/02 18:41 by princess_fluffypants

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