Analysis of Real-World Preignition Data Using Neural Networks

2023-01-1614

10/31/2023

Features
Event
Energy & Propulsion Conference & Exhibition
Authors Abstract
Content
1Increasing adoption of downsized, boosted, spark-ignition engines has improved vehicle fuel economy, and continued improvement is desirable to reduce carbon emissions in the near-term. However, this strategy is limited by damaging preignition events which can cause hardware failure. Research to date has shed light on various contributing factors related to fuel and lubricant properties as well as calibration strategies, but the causal factors behind an individual preignition cycle remain elusive. If actionable precursors could be identified, mitigation through active control strategies would be possible. This paper uses artificial neural networks to search for identifiable precursors in the cylinder pressure data from a large real-world data set containing many preignition cycles. It is found that while follow-up preignition cycles in clusters can be readily predicted, the initial preignition cycle is not predictable based on features of the cylinder pressure. This indicates that the alternating pattern of preignition cycles within clusters is influenced by the thermodynamic state as reflected in the pressure, but that the trigger for the initial preignition cycle is not thermodynamic in nature, but more likely tied to a critical threshold in the chemistry of the fuel/lubricant mixture in the upper crevice or other factors related to the presence of an ignition source.
Meta TagsDetails
DOI
https://doi.org/10.4271/2023-01-1614
Pages
9
Citation
Kaul, B., Maldonado, B., Michlberger, A., and Halley, S., "Analysis of Real-World Preignition Data Using Neural Networks," SAE Technical Paper 2023-01-1614, 2023, https://doi.org/10.4271/2023-01-1614.
Additional Details
Publisher
Published
Oct 31, 2023
Product Code
2023-01-1614
Content Type
Technical Paper
Language
English