Dependence of the coefficients of residual gases on the type of mixture formation and the shape of a combustion chamber

Корогодский, В. А.; Хандримайлов, А. А.; Стеценко, Оксана Николаевна

doi:10.15587/1729-4061.2016.59789

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…The area of the carbon formation spot increases in the direction from the spark plug located along the cylinder axis to the peripheral parts of the surface, adjoining the cylinder wall. Thus, based on the experiment and results of 3D modeling [16] of the working fluid motion, an increase in the FAM volume with increasing fuel delivery per stroke from the spark plug electrodes to the cylinder wall was found.…”

Section: Discussion Of Modeling Results Compared To Experimental Datamentioning

confidence: 90%

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Development of a three-zone combustion model for stratified-charge spark-ignition engine

Korohodskyi

Rogovyi

Voronkov

et al. 2021

EEJET

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A thermodynamic model for calculating the operating process in the cylinder of a spark-ignition engine with internal mixture formation and stratified air-fuel charge based on the volume balance method was developed. The model takes into account the change in the working fluid volume during the piston movement in the cylinder. The equation of volume balance of internal mixture formation processes during direct fuel injection into the engine cylinder was compiled. The equation takes into account the adiabatic change in the volume of the stratified air-fuel charge, consisting of fuel-air mixture volume and air volume. From the heat balance equation, the change in the fuel-air mixture volume during gasoline evaporation in the fuel stream and from the surface of the fuel film due to external heat transfer was determined. Basic equations of combustion-expansion processes of the stratified air-fuel charge were derived, taking into account three zones corresponding to combustion products, fuel-air mixture and air volumes. The equation takes into account the change in the working fluid volume due to heat transfer and heat exchange between the zones and the walls of the above-piston volume. Dependences for determining the temperature in the three considered zones and pressure in the cylinder were obtained. Graphs of changes in the volumes of the combustion products, fuel-air mixture and air zones with the change of the above-piston volume in partial load modes (n=3,000 rpm) were plotted. With increasing load from bmep=0.144 MPa to bmep=0.322 MPa, at the moment of fuel ignition, the volume of the fuel-air mixture increases from 70 % to 92 % of the above-piston volume. At the same time, the air volume decreases from 30 % to 8 %. Analysis of theoretical and experimental indicator diagrams showed that discrepancies in the maximum combustion pressure do not exceed 5 %

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Section: Discussion Of Modeling Results Compared To Experimental Datamentioning

confidence: 90%

“…Rather high technical-economic and environmental performance of the 1D 8.7/8.2 s DI SI engine when operating on gasoline was obtained [15]. An increase in engine parameters was due to effective interaction of gas exchange [16], mixture formation [17] and stratified fuel-air charge (FAC) combustion processes [18].…”

Section: Introductionmentioning

confidence: 99%

Development of a three-zone combustion model for stratified-charge spark-ignition engine

Korohodskyi

Rogovyi

Voronkov

et al. 2021

EEJET

View full text Add to dashboard Cite

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“…The issue of changes in the concentration of harmful components on the soil depending on the composition of the mixture and the structure of the engines was considered in [24]. But the authors did not take into account all the design features of modern automobile engines that affect the concentration of toxic components in the soil.…”

Section: Literature Reviewmentioning

confidence: 99%

Technology of Obtaining Mixed Alternative Fuel Based on Organic Substances for Mining Technological Transport Engines

Melnyk

Romanyshyn

Mosora

et al. 2023

Management Systems in Production Engineering

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In connection with the increase in the price of fuel based on hydrocarbons, the search and use of alternative types of fuel for machines in the mining and oil production industry is quite relevant today. Most of the existing alternative fuels by themselves cannot be considered as ready-to-use motor fuels. One of the ways to solve this problem is to use their mixtures with commercial fuels in certain ratios. This work deals with the development and research of the main characteristics of the mixer for obtaining mixed fuels based on diesel fuel and soybean oil, as well as the results of the study of the physical and operational properties of the obtained mixtures of different volume ratios of diesel fuel and soybean oil. The process of obtaining a mixed alternative fuel based on diesel fuel and soybean oil was implemented on a developed installation consisting of a mixer, the design of which is protected by a patent of Ukraine, and a gear pump. The study of the characteristics of the mixer as part of the installation showed that at a temperature of the components of the alternative fuel of 20°С, with a loss of full pressure on the mixer Δр ≈ (60-65) kPa, the volume consumption of soybean oil reached 10.7.10-6 m3/s. The time of preparation of the fuel mixture in the amount of 195 liters with a content of soybean oil of 10% ranged from 30 to 33 minutes. As research has shown, mixing soybean oil with diesel fuel in the amount of 5-50% vol. provides an improvement in viscosity-temperature properties and makes it possible to use such mixtures in diesel engines without changes in the design of the power supply system and regulation of fuel equipment, which characterizes soybean oil as a promising additive to diesel fuels to improve their technical and operational performance.

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“…Coordination of interaction of injected fuel particles with air charge flows before FAM ignition at the compression stroke [42] is ensured by the fuel jet structure and during the course of combustion phases, it is organized due to the design features of the piston bottom and the inner surface of the combustion chamber in the cylinder head.…”

Section: Features Of Organizing the Operating Process For The Spark-ignition Engine With Internal Mixture Formationmentioning

confidence: 99%

Determining the characteristics for the rational adjusting of an fuel-air mixture composition in a two-stroke engine with internal carburation

Korohodskyi

Kryshtopa

Migal

et al. 2020

EEJET

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Розроблено робочий процес для двигунів з іскровим запалюванням і безпосереднім впорскуванням палива, що забезпечує організацію розшарованого збідненого паливоповітряного заряду на часткових навантаженнях та потужносного складу паливоповітряної суміші на підвищених навантаженнях.Проведена модернізація конструкції двотактного двигуна з іскровим запалюванням шляхом установки системи безпосереднього впорскування палива, розміщення форсунки в стінці циліндра і зміни форми камери згоряння. Розроблено методику проведення регулювальних характеристик за складом паливоповітряної суміші в циліндрі двотактного двигуна з іскровим запалюванням. Особливістю методики є реєстрація параметрів і показників двигуна при постійній цикловій подачі палива та регулюванні повітря на впуску. Запропонована методика дозволяє точніше регулювати склад паливоповітряної суміші завдяки більш точному дозуванню повітря, ніж циклової подачі палива. Проведено експериментальні дослідження і побудовано регулювальні характеристики за складом паливоповітряної суміші в циліндрі двотактного двигуна з розробленим робочим процесом. Побудовано навантажувальні характеристики (n=3000 хв -1 ) раціонального регулювання за граничною економічністю та максимальною потужністю на базі даних регулювальних характеристик за складом паливоповітряної суміші. Встановлено, що за навантажувальною характеристикою раціонального регулювання економічного складу паливоповітряної суміші в циліндрі двигуна (λ цил. ек ) змінюється від 1,31 до 1,94, а мінімальна витрата палива становить g e min =259 г/(кВт•год). За навантажувальною характеристикою раціонального регулювання потужносного складу паливоповітряної суміші в циліндрі двигуна (λ цил. п ) змінюється від 1,31 до 1,7, а витрата палива на часткових навантаженнях становить g e =270 г/(кВт•год). Характеристики за витратою повітря в залежності від циклової подачі палива можуть бути використані для зміни складу паливоповітряної суміші при автоматичному регулюванні навантаження двигунаКлючові слова: двигунів з іскровим запалюванням, робочий процес, внутрішнє сумішоутворення, паливоповітряна суміш

show abstract

Dependence of the coefficients of residual gases on the type of mixture formation and the shape of a combustion chamber

Cited by 9 publications

References 5 publications

Development of a three-zone combustion model for stratified-charge spark-ignition engine

Development of a three-zone combustion model for stratified-charge spark-ignition engine

Technology of Obtaining Mixed Alternative Fuel Based on Organic Substances for Mining Technological Transport Engines

Determining the characteristics for the rational adjusting of an fuel-air mixture composition in a two-stroke engine with internal carburation

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