Quote:
Originally posted by lrg
For what it is worth, I believe the theory behind the EGR is that adding burnt gasses (exhaust) slows combustion and lowers the gas temps slightly which in turn reduces NOx production. NOx is largely a product of high temps at combustion.
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No, actually the reduction in emissions is because the exhaust gas is burned again. EGT's are higher with EGR systems, because it's burning exhaust thats already hot, not fresh cool air. The EGT's however aren't a concern, its the sooty exhaust that the EGR recycles that might be clogging our intakes....
