Application of a one-dimensional fuel-oil dilution model coupled with an empirical droplet-to-film formation strategy for predicting in-cylinder oil effects in a direct injection engine

Nowadays climate change due to the unnatural increment of green-house effect is one of the most critical environmental issues. In this context, internal combustion engines are still a short - term valuable solution. This is made possible by the study and the development of synthetic or alternative f...

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Bibliographic Details
Published in:Journal of physics. Conference series 2022-12, Vol.2385 (1), p.12063
Main Authors: Renzis, E D, Mariani, V, Bianchi, G M, Falfari, S, Cazzoli, G
Format: Article
Language:English
Subjects:
Alternative fuels
Cold starts
Computational fluid dynamics
Context
Cylinder heads
Cylinder liners
Dilution
Greenhouse effect
Injectors
Internal combustion engines
Liquid fuels
Lubricants
Mass transfer
Particulate emissions
Physics
Synthetic fuels
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Summary:Nowadays climate change due to the unnatural increment of green-house effect is one of the most critical environmental issues. In this context, internal combustion engines are still a short - term valuable solution. This is made possible by the study and the development of synthetic or alternative fuels, such e - gasolines and hydrogen. In this context, direct injection is still the most adopted strategy to improve internal combustion engine efficiency. The installation of the injector on the cylinder head may lead to the impact of the fuel on the wall of the cylinder liner. This phenomenon causes lubricant oil dilution, possibly increasing particulate matter emission at low load and abnormal combustions, known as low - speed pre-ignitions, at high load. The present paper aims to evaluate the influence of a set of established key parameters anticipating the effects of lubricant oil - fuel diffusion through a one - dimensional model implemented in Python. The model accounts for the runtime deposition of the fuel film by means of the results of a three - dimensional Computational Fluid Dynamics spray simulation. The model accounts also for the heat and mass transfer between species and the liquid fuel phase change for a representative setup of nowadays injectors. The dilution of a multigrade lubricant oil caused by synthetic fuels under an engine cold start operative condition is evaluated in this work.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2385/1/012063