OPTIMIZATION OF PISTON BOWL GEOMETRY AND FUEL INJECTION PARAMETERS IN MODERN DIESEL ENGINES

Authors

  • Abdullayev A Senior Lecturer, Andijan State Technical Institute
  • Mukhtarov Omadbek Student, Andijan State Technical Institute

DOI:

https://doi.org/10.5281/zenodo.20233039

Keywords:

diesel engine, piston bowl geometry, combustion chamber, fuel injection, injector nozzle, spray angle, swirl flow, squish flow, air-fuel mixture, thermal efficiency, exhaust emissions.

Abstract

This article investigates the influence of piston bowl geometry, injector nozzle design, spray direction, and in-cylinder air motion on the combustion quality of modern diesel engines. Unlike general studies that describe the combustion process in diesel engines, this paper focuses on design-related factors that improve air-fuel mixing, reduce incomplete combustion, and increase thermal efficiency. The study analyzes the role of re-entrant piston bowls, swirl and squish flows, multi-hole injectors, high-pressure fuel injection, and optimized spray targeting. The results show that the proper coordination of combustion chamber geometry and fuel injection parameters can improve mixture formation, increase combustion stability, reduce fuel consumption, and decrease harmful emissions such as soot, carbon monoxide, unburned hydrocarbons, and nitrogen oxides. The article concludes that the constructive improvement of combustion chamber and injection system elements is one of the most effective directions for increasing the efficiency and ecological performance of diesel engines.

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References

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Published

2026-05-16

Issue

Vol. 5 No. 5 (2026): Journal of Multidisciplinary Sciences and Innovations

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors retain the copyright of their manuscripts, and all Open Access articles are disseminated under the terms of the Creative Commons Attribution License 4.0 (CC-BY), which licenses unrestricted use, distribution, and reproduction in any medium, provided that the original work is appropriately cited. The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.

How to Cite

OPTIMIZATION OF PISTON BOWL GEOMETRY AND FUEL INJECTION PARAMETERS IN MODERN DIESEL ENGINES. (2026). Journal of Multidisciplinary Sciences and Innovations, 5(5), 1063-1069. https://doi.org/10.5281/zenodo.20233039

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