Effect of injection parameters on combustion and emission characteristics under catalyst heating operation in a direct-injection spark-ignition engine

Kim, Nam-Ho; Chung, Jong‐Won; Kim, Joohan; Cho, Seokwon; Min, Kyoungdoug

doi:10.1016/j.enconman.2021.115059

Cited by 9 publications

(3 citation statements)

References 49 publications

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“…Notwithstanding the residual error is still not negligible for the SOI 150, the fact that it is largely lower than 1 OoM represents a satisfying result, as confirmed by the existing literature. 63,73 Moving to the gaseous emissions, Figure 19(a) to (d) report the values during the hot portion of the engine cycle, where formation is expected. Focusing on CO in Figure 19(a), at the end of the simulation mass is higher for the most delayed SOI.…”

Section: Numerical-experimental Comparison On Pollutant Emissionsmentioning

confidence: 99%

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Modeling of gaseous emissions and soot in 3D-CFD in-cylinder simulations of spark-ignition engines: A methodology to correlate numerical results and experimental data

Berni

Pessina

Paltrinieri

et al. 2022

International Journal of Engine Research

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In order to reduce development costs and time-to market, 1D and 3D CFD tools can support engine design providing reliable estimations of the tailpipe emissions. In particular, 3D-CFD in-cylinder simulations can evaluate formation of both soot and gaseous pollutants inside the combustion chamber. The main issue in such kind of simulations is the validation against experimental findings. In fact, the complexity of the emission measurements does not allow a straightforward one-to-one comparison between numerical and experimental results. Therefore the present paper aims at providing, on the one hand, a robust numerical framework for both gaseous and solid emissions, on the other hand a dedicated post-processing for a fair comparison between simulations and experiments. From a numerical standpoint, a simplified approach is dedicated to gaseous emissions, while a more detailed one is reserved to soot modeling. The latter is based on the Sectional Method, whose reaction rates are tabulated following 0D chemical kinetic simulations of a purposely designed surrogate in a constant pressure reactor. Simulations and experiments proposed in the present analysis are referred to a high-performance turbocharged direct-injection spark-ignition engine operated at part-load and low rpms. On equal performance, revving speed and mean mixture quality, different injection timings are investigated. The developed numerical approach and post-processing ensure a good agreement between simulations and experiments.

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Section: Numerical-experimental Comparison On Pollutant Emissionsmentioning

confidence: 99%

Section: Combustion Validationmentioning

confidence: 99%

Modeling of gaseous emissions and soot in 3D-CFD in-cylinder simulations of spark-ignition engines: A methodology to correlate numerical results and experimental data

Berni

Pessina

Paltrinieri

et al. 2022

International Journal of Engine Research

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“…The engine geometrical data and the operative conditions in the present work are listed in table 2 and based on the TGDI research engine of the paper [23]. The operative parameters are selected to simulate a cold start condition, which is critical for soot formation and lubricant oil dilution.…”

Section: Reference Conditions and 1d Dilution Model Workflowmentioning

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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Effects of injection timing on mixture formation, combustion, and emission characteristics in a n-butanol direct injection spark ignition engine

Liu,

Zhen,

Geng

et al. 2024

Energy

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Effect of injection parameters on combustion and emission characteristics under catalyst heating operation in a direct-injection spark-ignition engine

Cited by 9 publications

References 49 publications

Modeling of gaseous emissions and soot in 3D-CFD in-cylinder simulations of spark-ignition engines: A methodology to correlate numerical results and experimental data

Modeling of gaseous emissions and soot in 3D-CFD in-cylinder simulations of spark-ignition engines: A methodology to correlate numerical results and experimental data

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

Effects of injection timing on mixture formation, combustion, and emission characteristics in a n-butanol direct injection spark ignition engine

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