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Theses

Impact des propriétés des gaz d'échappement recyclés sur l'initiation et le déroulement de la combustion : caractérisation paramétrique de la réactivité de l'EGR

Abstract : Due to new standards on exhaust pollutant emissions, new low temperature combustion (LTC) processes as the HCCI mode (Homogeneous Charge Compression Ignition) are developed. Indeed, the HCCI mode has the potential to achieve near zero nitric oxide and near zero particulate emissions. Nevertheless, it is necessary to better control the ignition and combustion: via new technical solutions, via changes in fuel formulation, via high rates of EGR (Exhaust Gas Recirculation) whose composition and reactivity could change, or by the combination of these different points. The fuel formulation, the EGR reactivity and the variation of their composition are the key points of this thesis.
In order to measure the composition of these recycled gases and the influence of the engine parameters on it, a study with an HCCI engine was performed. To study the influence of the addition of some EGR compound species on the HCCI combustion, an HCC engine bench and a jet-stirred reactor were used.
So, this thesis enables to emphasize the recycled gas composition in HCCI mode which was then unrecognized, the engine parameters influencing the gas composition but also the fuel formulation, the composition evolution in the EGR pipe but above all the chemical impact of these recycled gases on the ignition and the HCCI combustion.
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https://tel.archives-ouvertes.fr/tel-00363414
Contributor : Aurélie Piperel <>
Submitted on : Monday, February 23, 2009 - 11:50:30 AM
Last modification on : Thursday, March 5, 2020 - 6:48:54 PM
Long-term archiving on: : Tuesday, June 8, 2010 - 10:48:48 PM

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  • HAL Id : tel-00363414, version 1

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Aurélie Piperel. Impact des propriétés des gaz d'échappement recyclés sur l'initiation et le déroulement de la combustion : caractérisation paramétrique de la réactivité de l'EGR. Energie électrique. Université d'Orléans, 2008. Français. ⟨tel-00363414⟩

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