|
In my turbo diesel, there is no throttle butterfly, EGR does clutter intake manifold with goo from exhaust, causing eventually lot of problems, when car was new it perhaps did help, but when it is making such a mess nothing works and in this engine type it is known to be cause of engine failures because stuff from intake manifold can get loose and big chunks enter between valve etc.
Also in stage that it is in many of these cars emissions will be also higher with EGR connected.
It is recommended that system is disabled by unplugging connector to EGR valve or regular cleanup of manifold and pipes, which does require removing cylinder head as there is no other way to get intake manifold out.
So it is not always good system.
One thing is bit puzzling, hotter burn = cleaner burn, this is what we are being taught here, but I did read that EGR lowers burn temperature, is this case again one of those were one parameter is lowered in expense of others?
As with any system, when they are operated as designed, things are nice, but with older tech conditions can be far from designed, most logical solution would be to make everything to designed specifications, but it seems to be that few cares about that, as long as tests are passed it is cool, no matter how system really runs.
|