Posted by ajl on September 27, 2015 at 19:57:13 from (208.38.4.128):
In Reply to: OT Discussion on VW posted by David G on September 27, 2015 at 08:38:32:
It is likely that the cars in question used Exhaust Gas Recirculation (EGR) and not DEF. DEF is after treatment and does not affect the engines performance. It is the technology that seems to work and all new diesel use it. Trying to get the NOx down in cylinder would be the source of the problem. When they did that the cars would likely be barely drive able as Navistar found out in trucks. They used EGR and the competition used DEF and the competition won. New Navistar engines use DEF as a result. Cat did not develop DEF technology and now no longer produce truck engines.
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