HCCI Combustion Using Engine Fuels with and without Oxygenated Compounds
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For further development of pre-mixed diesel combustion processes, as well as their model-based numerical calculation, a deep understanding of two-stage ignition of homogeneous diesel fuel air mixtures is indispensable. In the FVV research Project Fuel Indices (Kraftstoffkennzahlen II), 1-D/3-D ignition delay models have been developed for fuels with and without oxygenated compounds with a range of cetane numbers based on measurements from single-cylinder engines and a Rapid Compression Expansion Machine. The transferability of the parameterisations based on the surrogate fuels characterised in the RCEM to the engine data with real fuels is successfully demonstrated.
Further improvement of engine efficiency while simultaneously lowering emissions are the main objectives of current internal combustion engine combustion research. Premixed Charge Compression Ignition (PCCI) is seen as a promising concept for part load operation in view of controllability, emission reduction...
The IVK part was funded by the Federal Ministry of Economic Affairs and Energy (BMWi) throughout the Consortium of Industrial Research Associations (Arbeitsgemeinschaft industrieller Forschungsvereinigungen e.V., AiF-Nr. 17554 N/1). The LAV project part was co-funded by the Swiss Federal Office of Energy (S/I500801-01, S/I500818-01), the FVV (FVV-Vorhaben-Nr. 1125) and the Swiss Oil Association. The project was supervised by an FVV working group directed by Dr.-Ing. Frank Atzler, Continental AG, and their helpful input and support are gratefully acknowledged. We also thank OMV AG for preparing and delivering the test fuels at no charge as well as the Daimler AG for the test engine and the spare parts, also free of charge.