Ducted Fuel Injection presented as a retrofit path to eliminate soot and cut NOx

At a technical presentation, a presenter described Ducted Fuel Injection (DFI) as "a very simple, practical, mechanical solution" that improves fuel–air mixing before combustion to reduce soot and improve efficiency.

The presenter said DFI can be retrofitted into existing large engines and used in new engines, enabling use of current supply chains and infrastructure. "It basically improves fuel air mixing which ultimately enables improved combustion which results in lower soot production," the presenter said. The talk framed soot prevention as a gateway to cheaper nitrogen-oxide (NOx) control once particulate emissions are no longer a constraint.

The presenter cited laboratory experiments and recent multi-cylinder engine tests with a commercial partner as evidence the approach is viable. He said a related concept called "lean mixing controlled combustion," enabled by DFI, can "completely eliminate soot, lower nitrogen oxide emissions by at least 70% and also increase efficiency." The presenter added that those gains could reduce both fuel and emissions-control costs for operators.

No formal regulatory action or vote was recorded in the presentation; the remarks described research findings and deployment potential rather than a policy decision.