Modeling and Performance Optimization of a Direct Injection Spark Ignition Engine for the Avoidance of Knocking

Michela Costa, Ugo Sorge, Paolo Sementa, Bianca Maria Vaglieco

2014

Abstract

The paper applies simulation techniques for the prediction and optimization of the thermo-fluid-dynamic phenomena characterising the energy conversion process in an internal combustion engine. It presents the development and validation of a 3D CFD model for a GDI optically accessible engine operating either under stoichiometric homogeneous charges or under overall lean mixtures. The model validation is realized on the ground of experimental measurements of the in-cylinder pressure cycle and of the available optical images. The model comprehends properly developed sub-models for the spray dynamics and the spray-wall interaction. This last is particularly important due to the nature of the mixture formation mode, being of the wall-guided type. In the stoichiometric mixture case, the possible occurrence of knocking is also considered by means of a sub-model able to reproduce the pre-flame chemical activity. The CFD tool is finally included in a properly formulated optimization problem aimed at minimizing the engine specific fuel consumption with the avoidance of knocking. The optimization, performed through a non-evolutionary algorithm, allows determining the best engine control parameters (spark advance and start of injection).

Paper Citation

in Harvard Style

Costa M., Sorge U., Sementa P. and Vaglieco B. (2014). Modeling and Performance Optimization of a Direct Injection Spark Ignition Engine for the Avoidance of Knocking . In Proceedings of the 4th International Conference on Simulation and Modeling Methodologies, Technologies and Applications - Volume 1: SIMULTECH, ISBN 978-989-758-038-3, pages 484-496. DOI: 10.5220/0005040204840496

in Bibtex Style

@conference{simultech14,
author={Michela Costa and Ugo Sorge and Paolo Sementa and Bianca Maria Vaglieco},
title={Modeling and Performance Optimization of a Direct Injection Spark Ignition Engine for the Avoidance of Knocking},
booktitle={Proceedings of the 4th International Conference on Simulation and Modeling Methodologies, Technologies and Applications - Volume 1: SIMULTECH,},
year={2014},
pages={484-496},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005040204840496},
isbn={978-989-758-038-3},
}

in EndNote Style

TY - CONF
JO - Proceedings of the 4th International Conference on Simulation and Modeling Methodologies, Technologies and Applications - Volume 1: SIMULTECH,
TI - Modeling and Performance Optimization of a Direct Injection Spark Ignition Engine for the Avoidance of Knocking
SN - 978-989-758-038-3
AU - Costa M.
AU - Sorge U.
AU - Sementa P.
AU - Vaglieco B.
PY - 2014
SP - 484
EP - 496
DO - 10.5220/0005040204840496