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Here is a photograph of a SD70 that meets Tier 0 emissions;
http://www.railpictures.net/viewphoto.php?id=283387&nseq=59

Here meeting Tier 1;
http://www.railpictures.net/viewphoto.php?id=287859&nseq=12

And here meeting Tier 2;
http://www.railpictures.net/viewphoto.php?id=287754&nseq=11

And here is for GE

Dash-9 meeting Tier 1;
http://www.railpictures.net/viewphoto.php?id=288716&nseq=26

GEVO meeting Tier 2;
http://www.railpictures.net/viewphoto.php?id=289345&nseq=5

Note the major increase in radiator size. Not visible is the fact that the cooling systems are now microprocessor controlled, and must maintain engine temperatures within much tighter limits. On the GE GEVO
shown notice the large boxy structure ahead of the radiator, this is a air to air intercooler that cools the intake air after it leaves the turbocharger and before it enters the diesel engine.

How tough can it be to meet the new emissions standards? Tough enough to convince Caterpillar to leave the market for building diesel engines for trucks. They couldn't build a diesel engine with acceptable reliability at a cost that was competitive. They had a significant chunk of the market.

Tier 3 isn't going to be too bad, but Tier 4 is going to be real trouble.

by jfbeaulieu on Thu Jul 9th, 2009 at 01:06:29 PM EST
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