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Fire coming out of diesels
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[quote]<i>Originally posted by Overmod</i> <br /><br />Some little points that Randy might confirm in better detail: <br /> <br /> <br />Your basic EMDs, on the other hand, are using the turbo to pressurize the crankcase... <br /> <br />I'm a little slow here...So for my benefit lets consider GE's locomotive prime movers 4 stroke diesels engines and EMD's locomotive prime movers a 2 stroke diesel engine(which was the rule, to about 4 or 5 years ago). <br /> <br />A turbo uses exhaust gases to drive a compressor (the turbo) that compresses air so that more oxygen reaches the combustion chamber of whatever type of diesel. The compressor/turbo has two main inlets and outlets. <br /> <br />The drive inlet and outlet of a turbo/compressor is driven by the engines exhaust gases. When the diesel engine exhausts through a port or valve to the exhaust manifold it spins a compressor blade in the turbo. Inlet for the turbo from exhaust is small, outlet of the turbo is large. <br /> <br />This exhaust driven compressor blade in the turbo compresses the incoming air so the engine can burn more fuel, thus creating more horsepower. A turbo on either a 2 or 4 stroke diesel has little or no affect on pressures to the crankcase in a simple understanding. Flow of the air is exactly reverse from the exhaust. Inlet air is carried from a large hole and pushed through a small hole. <br /> <br />This turbine blade in the turbo/compressor, rotates very fast, so to make sure this doesn't overheat it is lubricated via a wet bearing, oil coming from the engines lube oil. If the seal fails on the exhaust side, a person calls a crew to clean oil off of stuff like Randy states. <br /> <br />If the seal fails on the inlet side, a nice stack fire happens. Gosh, Mr Smart, my high school shop teacher, thanks for the basics, you let me figure this out through writing it out. <br /> <br />Randy, its apparent you have never seen a turbo seal failure on the intake side! Now, I remember watching a turbo fire. Its just like the GE stack fires pictured recently, these not happening in EMD's, so it must be a design flaw with the GE's! <br /> <br />Jim Bryant - Lawton, NV MP 236 <br />
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