Combustion analysis in a SI engine with homogeneous and stratified pre-chamber system 2018-36-0112
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.
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. Download Citation
Author(s):
Carlos Eduardo Castilla Alvarez, Vinicius Rückert Roso, Nathalia Duarte Souza Alvareng Santos, Alysson Teixeira Fernandes, Ramon Molina Valle
Affiliated:
Universidade Federal de Minas Gerais
Pages: 8
Event:
2018 SAE Brasil Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Ignition systems
Spark ignition engines
Fuel consumption
Combustion and combustion processes
Fuel injection
Hydrogen fuel
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