Using Ducted Fuel Injection to Attenuate Soot Formation in a Mixing-Controlled Compression Ignition Engine
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Ducted fuel injection (DFI) is a plan that can be used to enhance the fuel/charge-gas mixing within the combustion chamber of a direct-injection mixing-controlled compression-ignition engine. The concept involves injecting the fuel through a small tube within the combustion chamber to facilitate the creation of a leaner mixture in the autoignition zone, relative to a conventional free-spray configuration (i.e., a fuel spray that is not surrounded by a duct). Although previous experiments demonstrated that DFI lowers both soot incandescence and soot mass in a constant-volume combustion vessel with a single-component normal-alkane fuel (n-dodecane), this work provides the first evidence that the technology provides similar benefits in an engine application using a commercial diesel fuel containing ~30 wt% aromatics. The present study investigates the effects on engine-out emissions and efficiency with a two-orifice injector tip for charge-gas mixtures containing 16 and 21 mol% oxygen. The result is that DFI is shown to be effective at curtailing engine-out soot emissions. It also breaks the soot-NOx tradeoff by simultaneously attenuating soot and NO. with increasing dilution.
- Research Organization:
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Vehicle Technologies Office; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office; USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000; NA0003525
- OSTI ID:
- 1529141
- Alternate ID(s):
- OSTI ID: 1559549
- Report Number(s):
- SAND-2019-1518J; SAND-2018-12942J; 672499
- Journal Information:
- SAE International Journal of Engines (Online), Vol. 12, Issue 3; ISSN 1946-3944
- Publisher:
- SAE InternationalCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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