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Old 12-20-2019, 09:17 PM   #41
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Originally Posted by Soo-Valley View Post
Ski, I get how it works now.
I do not get how the fuel is prevented from igniting at the intake end of the tube before the fuel/air is mixed out the other end.

My guess is that as the fuel evaporates, it dramatically cools the small amount of air inside the tube and there's just enough of a temperature drop that it won't ignite. Once it hits the outlet end of the tube, it's nicely mixed with the air and ignites instantly.

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Old 12-20-2019, 09:25 PM   #42
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Originally Posted by wkearney99 View Post
Heh, got a glossary for that alphabet soup? SCR, BOI, PM, USEPA?
SCR: selective catalytic reduction - one of the most popular methods to reduce NOx from Diesel engine exhaust, where urea is injected into the exhaust stream to react to the exhaust gasses and then react to a catalyst element to convert the NOx to nitrogen and water.

BOI: Beginning of Injection

EOI: End of Injection

PM: particulate matter, mostly unburned hydrocarbons, commonly referred to as soot.

USEPA: United States Environmental Protection Agency 😉

I’ve got more, sadly.

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Old 12-20-2019, 09:26 PM   #43
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boi- beginning of injection
eoi- end of injection

Both beginning and end are where atomization is worst, more droplets, less spray, more soot and stink and smoke

scr- selective catalytic reduction. Exhaust after treatment to reduce NOx (oxides of nitrogen, considered a diesel pollutant.

usepa- united states environmental protection agency. Source of our pollution regs for diesels. Can be argued that they are good or bad, depending on your perspective.

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