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Old 11-03-2019, 02:07 PM   #1 (permalink)
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sandia.gov: Ducted fuel injection promises cleaner combustion

https://www.sandia.gov/news/publicat...injection.html
Quote:
Nitrogen oxides are also atmospheric pollutants, and the soot/NOx trade-off meant that truck, car and equipment makers couldn’t meet current legislated limits without adding exhaust-gas aftertreatment systems. But remove one of those pollutants almost entirely — like DFI does with soot — and Chuck said you have changed the game.

“Now that we’ve got soot out of the way, there’s no more soot/NOx trade-off,” he said. “So we can add dilution — taking some of the engine exhaust and routing it back to the intake — to get rid of NOx without soot emissions becoming a problem. It’s like a two-for-one deal on reducing pollutants.”
....
Paul Miles, manager of Sandia’s engine research program, said the potential impact of DFI cannot be overstated.

“Breaking the soot/NOx trade-off is the holy grail of diesel engine development,” Paul said.

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Old 11-04-2019, 11:38 AM   #2 (permalink)
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Need to explain that to the EPA, my VW has a massive coolant cooled EGR and still fails CA NOX.
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Old 11-04-2019, 01:24 PM   #3 (permalink)
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So you live in exile in Reno?

EGR is a known thing, but I would like to see drawings of the injectors. My best guess is that it is a bypass that draws compressed cylinder air along with the fuel being injected. Pace Bernoulli.

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