Abstract
HCCI (= Homogeneous Charge Compression Ignition) has become objective of many research work done during the last years due to its potential of simultaneous NOX and particulate matter reduction and high efficiency. Introducing HCCI-characteristics to a DI-Diesel engine, the main free parameters to control the combustion process are injection-rate-shaping, EGR and boost pressure. To achieve a controlled low emission combustion, chemical kinetics of the combustion process have to be understood and controlled effectively. Supercharging can increase the IMEP of the engine under HCCI-operation if combined with heavy EGR. Especially with the 2-stage ignition of diesel fuel cooled EGR is an effective mean of control for the start of main combustion and burning duration due to thermodynamic and chemical effects. Main goals of DI-HCCI research are reduced cylinder wall wetting and increased evaporation and mixing of the spray. Charge stratification should be achieved to avoid low temperature combustion near walls and to enhance low load stability.
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Groenendijk, A., Müller, E. (2004). Mixture Formation and Combustion Control for Low Emission DI Diesel Combustion with HCCI-Characteristics. In: Whitelaw, J.H., Payri, F., Arcoumanis, C., Desantes, J.M. (eds) Thermo- and Fluid Dynamic Processes in Diesel Engines 2. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-10502-3_19
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DOI: https://doi.org/10.1007/978-3-662-10502-3_19
Publisher Name: Springer, Berlin, Heidelberg
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