FY19 Annual Report Advanced Light-Duty SI Engine Fuels Research
- Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
This project furthers the science-base needed by industry stakeholder to co-evolve the next generations of highly efficient DISI engines and new gasoline-type fuels. Here, the research emphasis is on lean operation, which can provide high efficiency, using fuels that also support traditional non-dilute stoichiometric operation for peak load and power. Lean operation induces challenges with ignition stability, slow flame propagation and low combustion efficiency. Therefore, techniques that can overcome these challenges are studied. Specifically, fuel stratification is used to ensure ignition and completeness of combustion, but this technique has soot- and NOx- emissions challenges. For ultra-lean well-mixed operation, turbulent deflagration can be combined with controlled end-gas autoignition to render mixed-mode combustion for sufficiently fast heat release. However, such mixed-mode combustion requires appropriate autoignition reactivity, motivating fuel studies of autoignition under lean conditions.
- Research Organization:
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
- DOE Contract Number:
- AC04-94AL85000; NA0003525
- OSTI ID:
- 1481945
- Report Number(s):
- SAND2018-12700R; 669705
- Country of Publication:
- United States
- Language:
- English
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