Gasoline direct injection (GDI) is the most common and advanced fuel supply strategy for gasoline engines. The fuel atomization quality and fuel/air mix degree determine the subsequent combustion efficiency and emissions. However, the engine works in complex conditions which have numerous thermodynamic boundary conditions, and the characteristics of fuel atomization also change accordingly. It is necessary to clarify the influence of various thermodynamic conditions on the GDI spray. In this work, three different types of optics diagnostic methods were utilized to capture the macroscopic and microscopic characteristics of a commercial GDI injector spray under various thermodynamic boundary conditions. Specifically, Mie-scattering photography was employed to get the macroscopic parameters; planar Mie-scattering photography was utilized to get the spray pattern; phase Doppler interferometry (PDI) was used to get the microscopic characteristic, i.e., the droplet size distributions. It is found from this study that higher injection pressure, lower ambient pressure, and lower ambient temperature would lead to longer penetration and larger plume width. Lower ambient pressure and higher ambient temperature would cause a smaller spray pattern. Higher injection pressure, lower ambient pressure, and higher ambient temperature would result in smaller droplet sizes.
- Open Access
- Article
Macroscopic and Microscopic Characteristics of a GDI Spray Under Various Thermodynamic Conditions
- Jian Li 1,
- Lulu Li 1,
- Rujie Xiao 1,
- Yuanfei Liang 1,
- Shuyi Qiu 2,
- Xuesong Li 2, *
Author Information
Received: 03 Apr 2023 | Accepted: 09 Aug 2023 | Published: 28 Aug 2023
Abstract
Keywords
internal combustion engine | gasoline direct injection | optics diagnostic | fuel spray | thermodynamic condition
References
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How to Cite
Li, J.; Li, L.; Xiao, R.; Liang, Y.; Qiu, S.; Li, X. Macroscopic and Microscopic Characteristics of a GDI Spray Under Various Thermodynamic Conditions. International Journal of Automotive Manufacturing and Materials 2023, 2 (3), 1. https://doi.org/10.53941/ijamm.2023.100007.
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Copyright (c) 2023 by the authors.
This work is licensed under a Creative Commons Attribution 4.0 International License.
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