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REPORT ABUSIVE REPLY
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Message Subject
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Cars running at 70 mpg BANNED in the US by Fed Gvmt
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Poster Handle
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Éireann |
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Post Content
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...Somehow this just seems backwards to me. Ya know? You'd think if a car got 70mpg, rather than 28mpg, it would be less polluting. I just can't for the life of me understand the emission law thing when it comes to mpg. I guess I'm brain dead  Quoting: Éireann It has to do with the chemistry...when HC, CO, CO2 and Nox come out of the engine as a result of combustion, the catalyst reaction turns them into CO2 and H2O with some O2 left over...see how simple that is?  Well, yes, Brief. I know that part of how an engine works, but isn't it also true that to get the higher MPG what would have been exhaust is recycled back into the engine as fuel which means that there are less emissions? Or am I totally missing it? No, if you are thinking of a turbo, the spent gasses just run an air compressor to ram more air into each cylinder but you still end up with oxides of nitrogen (Nox) due to high compression...the only way to clean that up is with a catalytic converter... Ahhh! K. Now I get it. Thanks, Brief :D 
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