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Effect of EGR Chemical Components and Intake Temperature on HCCI Combustion Development
Technical Paper
2006-32-0044
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In an optical Homogeneous Charge Compression Ignition (HCCI) engine, experiments were performed to study the combustion of different surrogate fuels (n-heptane, 75%n-heptane/25%isooctane, 80%n-heptane/20%toluene). The effect of laboratory simulated EGR rates, inlet temperatures and the presence of different chemical species in the EGR on the ignition combustion timings were analyzed at a fixed equivalence ratio (0.3). The mixture homogeneity was verified by Laser-Induced-Fluorescence on the toluene. The experimental results affirm that the EGR delays the combustion unlike the inlet temperature. Intake CO and CH4 addition has no effect on ignition timings whereas a promoting effect of NO is checked. A zero-dimensional model was developed and offered encouraging tendencies by comparison with the experiments.
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Citation
Dubreuil, A., Foucher, F., and Mounaϊm-Rousselle, C., "Effect of EGR Chemical Components and Intake Temperature on HCCI Combustion Development," SAE Technical Paper 2006-32-0044, 2006, https://doi.org/10.4271/2006-32-0044.Also In
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