Lube-Oil Dilution of GDI Engines with Ethanol Fuels

Küpper, Carsten; Artmann, Christina; Pischinger, Stefan; Rabl, Hans‐Peter

doi:10.1365/s40112-014-0570-5

Cited by 2 publications

(1 citation statement)

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“…The benefits of the injection split were studied also by Küpper et Al. [19]. In their work, they analyzed by means of experiments and three -dimensional Computational Fluid Dynamics (3D CFD) simulations, the wall film generated with different injection strategies (i.e.…”

Section: Introductionmentioning

confidence: 99%

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

Renzis

Mariani

Bianchi

et al. 2022

J. Phys.: Conf. Ser.

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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.

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Section: Introductionmentioning

confidence: 99%