Optimization of Design and Technology of Injector Nozzles in Terms of Minimizing Energy Losses on Friction in Compression Ignition Engines

Monieta, J.; Kasyk, L.

doi:10.3390/app11167341

Cited by 8 publications

(9 citation statements)

References 26 publications

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“…The injectors of the tested engines were modernized during production, in which the opening pressure was increased from 25 to 40 MPa. The nozzles had different designs of spray holes and were manufactured by other producers [29]. The injector nozzles had informative markings.…”

Section: Research Objectsmentioning

confidence: 99%

“…For example, 159 • × 07 × 0.26R meant that the holes were at an angle of 159 • in the number of 7 with a spray hole diameter of 0.26 mm, and the holes were EDM-rounded. Nozzle bodies of the rounded spray holes from the inlet side were marked with the letter R. Rounding the spray holes from the inside of the body was aimed to change the fuel injection characteristics and stable operation of the nozzle during operation [29].…”

Section: Research Objectsmentioning

confidence: 99%

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Diagnosing Cracks in the Injector Nozzles of Marine Internal Combustion Engines during Operation Using Vibration Symptoms

Monieta

2023

Applied Sciences

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In the operation of internal combustion engines, despite technical state monitoring, some cracks that develop in metal components go undetected, leading to secondary, critical, or degradation damage. The diagnostic systems used in floating objects mainly use quasi-static thermodynamic signals, which alert operators too late about emerging damage. Although various methods have been developed to detect cracks in internal combustion engine components, the effectiveness and implementation of the proposed methods are not satisfactory. Therefore, this article presents the use of selected vibration and in-cylinder pressure signals to diagnose the development of damage in some components of marine diesel engines. The investigations were conducted under the natural conditions of the operation of sea-going vessels during port-handling operations. During these investigations, it was possible to observe clear changes in the values of diagnostic symptoms, which corresponded to the development of damage. The developing damage detected in the study involved cracks in injector nozzles manufactured from alloy steel. Despite advances in design, materials, and manufacturing technology, injector nozzle cracks still occur. The diagnostic symptoms used to detect damage development were the amplitude and spectral and wavelet measurements of vibration acceleration signals. This work aimed to search for crack-oriented methods of signal analysis, for example, computer visualization and the recording of diagnostic parameters in various domains. Decimation, windowed, time, amplitude, and time-frequency domain analyses; wavelet statistics; color analysis; and machine learning were used for classification using artificial neural networks. Experimental investigations showed the possibility of diagnosing the development processes of damage to marine diesel engines. The advanced signal processing methods used made it possible to obtain many signal measurements, from which the most useful diagnostic symptoms were selected. The new symptoms found with decimation, time-domain windowed analysis, and Haar wavelet statistics were more useful than the existing ones.

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Section: Research Objectsmentioning

confidence: 99%

Section: Research Objectsmentioning

confidence: 99%

Diagnosing Cracks in the Injector Nozzles of Marine Internal Combustion Engines during Operation Using Vibration Symptoms

Monieta

2023

Applied Sciences

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“…Injector technology plays a crucial role in determining the quality of atomization, particularly the injector type and its geometry [40,[72][73][74][75]. For diesel engines, two types of injectors are normally used, namely, the piezo and the solenoid injector.…”

Section: Factors Affecting Spray Evolutionmentioning

confidence: 99%

Diesel Spray: Development of Spray in Diesel Engine

Djamari

Idris²,

Paristiawan³

et al. 2022

Sustainability

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Research and development in the internal combustion engine (ICE) has been growing progressively. Issues such as air pollution, fuel cost, and market competitiveness have driven the automotive industry to develop and manufacture automobiles that meet new regulation and customers’ needs. The diesel engine has some advantages over the gasoline or spark ignition engine, including higher engine efficiency, greater power output, as well as reliability. Since the early stage of the diesel engine’s development phase, the quest to obtain better atomization, proper fuel supply, and accurate timing control, have triggered numerous innovations. In the last two decades, owing to the development of optical technology, the visualization of spray atomization has been made possible using visual diagnostics techniques. This advancement has greatly improved research in spray evolution. Yet, a more comprehensive understanding related to these aspects has not yet been agreed upon. Diesel spray, in particular, is considered a complicated phenomenon to observe because of its high-speed, high pressure, as well as its high temperature working condition. Nevertheless, several mechanisms have been successfully explained using fundamental studies, providing several suggestions in the area, such as liquid atomization and two-phase spray flow. There are still many aspects that have not yet been agreed upon. This paper comprehensively reviews the current status of theoretical diesel spray and modelling, including some important numerical and experimental aspects.

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“…With respect to the optimization of compression ignition engines, two contributions to the Special Issue [6,7] deal with the optimization of the injection process since fuel mixing is critical in determining combustion efficiency and emissions levels.…”

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confidence: 99%

“…In [6], simulation optimization methods and methods based on evolutionary algorithms were elaborated on for the optimization of the design and technology of injector nozzles in terms of minimizing energy losses on friction in compression ignition engines. The technical state of the injector apparatus significantly affected the engine performance, fuel consumption, toxicity, and smoke opacity of outlet gases.…”

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confidence: 99%