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Combustion analysis in a SI engine with homogeneous and stratified pre-chamber system
Technical Paper
2018-36-0112
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Extensive studies of pre-chamber ignition systems in internal combustion engines have proven its effectiveness in reduction of fuel consumption and improvement in several combustion parameters. Considering the different types of pre-chamber configurations, this paper aims to compare the combustion in a SI engine with both homogeneous and stratified pre-chamber ignition systems. To achieve this objective a system with the ability to control the hydrogen injection in the pre-chamber was built. This system was installed in a multi-cylinder Ford Sigma 1.6L engine and tested in a dynamometric room. Tests consisted in imposing a constant rotation and IMEP to test three conditions: standard spark ignition, pre-chamber ignition system without fuel injection (homogenous) and with hydrogen injection (stratified). It was possible to identify that with the use of pre-chamber ignition system there is a reduction in specific fuel consumption and in the combustion duration. This phenomenon can be attributed to the increase of turbulence, created by the gases that leave the pre-chamber. With the stratified system, the presence of active chemical species resulting from the combustion of hydrogen intensifies this phenomenon.
Authors
- Carlos Eduardo Castilla Alvarez - Universidade Federal de Minas Gerais
- Vinicius Rückert Roso - Universidade Federal de Minas Gerais
- Nathalia Duarte Souza Alvareng Santos - Universidade Federal de Minas Gerais
- Alysson Teixeira Fernandes - Universidade Federal de Minas Gerais
- Ramon Molina Valle - Universidade Federal de Minas Gerais
Topic
Citation
Alvarez, C., Roso, V., Santos, N., Fernandes, A. et al., "Combustion analysis in a SI engine with homogeneous and stratified pre-chamber system," SAE Technical Paper 2018-36-0112, 2018, https://doi.org/10.4271/2018-36-0112.Also In
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