sandia.gov: Ducted fuel injection promises cleaner combustion

[freebeard]

https://www.sandia.gov/news/publicat...injection.html

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.

[Piotrsko]

Need to explain that to the EPA, my VW has a massive coolant cooled EGR and still fails CA NOX.

[freebeard]

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.

[cRiPpLe_rOoStEr]

It seemed quite confusing at first, but in the end it sounds promising

[oil pan 4]

Sounds like the dollar store version of air blast fuel injection
If it works, great. I don't see any reason it wouldn't work.

[cRiPpLe_rOoStEr]

Originally Posted by oil pan 4

I don't see any reason it wouldn't work.

Neither do I, but since it was inspired in a propane-powered device it took me a while to understand how it could benefit the operation with heavy fuels.