This is no different to bike manufacturers retarding ignition maps to pass noise regs.
The VW engines and others are very good and very clean. However for a Cat converter to work properly and efficiently it has to be hot. So an extra map is included when under test to burn fuel in the exhaust to get the CAT hot enough to pass emmisions. During driving once engine is hot it doesn't need this so its switched off.
Cummins IGX engines do the same by injecting diesel into the exhaust to make it hot enough for the emmisons control processes to work.
The general public is so dumbed down they haven't a hope in hell of understanding this so have been hoodwinked by media and the Elite. VW was just about to go mainstream with Electric car infrastructure in China to tune of 22 Billion dollars, coincidentally the same as their emmisions cheat fine.... make of that what you will.....
Every great cause begins as a movement, becomes a business, and eventually degenerates into a racket - Eric Hoffer
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