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1

Analysis of the fuel dose correction change trend in the diesel engine

Cieślikowski Bogusław

Technical Transactions

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2025

|

Vol. 122, iss. 1

art. no. e2025009

EN

The article contains a functional analysis of the diesel engine ECU controller in terms of estimating the fuel dose correction signal. The reasons for introducing fuel dose correction for injectors in the area of limit values were analyzed, indicating the need for the diesel engine diagnostic process according to OBDII procedures in terms of changes in this parameter during engine operation. It is possible to use the engine ECU controller to implement extended functional diagnostic procedures in the scope of controlling the increase in the fuel dose correction value in a continuous system after implementing the supplemented software. Observing the trend of fuel dose correction variability will determine in advance the risk of an error code and MIL indicator light for the diesel engine power supply system.

2

Performance analysis of the CRDI diesel engine's performance and emission parameters blended with leftover cooking oil, additional nanoparticles, and hydrogen enrichment

Dond Dipak Kisan, Barshikar Raghavendra Rajendra, Ghongade Harshvardhan, Bhadre Anjali, Dond Shantaram

International Journal of Applied Mechanics and Engineering

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2025

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Vol. 30, no. 1

53--64

EN

The low cost and wide availability of used cooking oil make it a desirable feedstock for the generation of biodiesel. In this study, Three distinct hydrogen enrichment values (4 lit/min, 6 lit/min, and 8 lit/min) and nanoparticle concentrations of 50, 100, and 150 PPM) are combined with used cooking oil blends (10%, 15%, and 20%) to evaluate the CRDI single-cylinder diesel engine's efficiency and emission properties. Split injection technique was used in the experiments to investigate the impact on emissions and engine efficiency. The outcomes reveal a significant improvement in brake thermal efficiency over standard diesel fuel, up to 8%. In addition, a noteworthy decrease was noted in particular fuel consumption and emissions parameters, including smoke, hydrocarbons (HC), and carbon monoxide (CO), under all experimental setups. On the other hand, there was a minor rise in nitrogen oxide (NOx) emissions. With encouraging gains in performance and emissions characteristics, this study clarifies the feasibility of using used cooking oil blends with hydrogen nanoparticle enrichment as a sustainable alternative fuel for CRDI diesel engines. Increased environmental friendliness and overall efficiency could be achieved with this alternative fuel technology with additional refinement and optimisation of engine operating parameters.

3

Analysis of the possibility of using the Sankey diagram in the diagnosis of a partially loaded diesel engine

Puzdrowska Patrycja, Skobyłko Jakub

Combustion Engines

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2025

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R. 64, nr 3

58--66

EN

The purpose of this article is to determine if, in the case of inability to carry out diagnostic tests at engine operating loads in the range of 70-90%, engine functional systems can generate diagnostic signals in the form of changes in heat balance components. The motivation for working on the selected topic was the need to evaluate the effectiveness of graphical forms of heat balance representation, especially Sankey diagrams, in heat engine diagnostics, using a four-stroke diesel engine as an example. Interpretation of the results was carried out based on simulations performed using Blitz-PRO software and experimental tests carried out on a test bench. For the numerical simulations, the object under analysis was modeled, which was a single-cylinder, four-stroke diesel engine Andoria S320. Both numerical simulations and experimental tests were carried out for three engine operating states: the reference state and two malfunction states: in the air intake system and the fuel supply system. The analyses made it possible to draw conclusions. It was assessed that carrying out the analysis of the Sankey diagram for partial load doesn’t bring significant diagnostic information.

4

Zapasowe agregaty prądotwórcze z silnikami wysokoprężnymi w elektrowniach jądrowych. Część 2

Nowicki Jacek

Bezpieczeństwo Jądrowe i Ochrona Radiologiczna

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2025

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nr 4 (138)

6--21

PL

Kontynuujemy rozpoczęty w numerze 3/2025 „Biuletynu BJOR” temat zapasowych agregatów prądotwórczych z silnikami wysokoprężnymi w elektrowniach jądrowych. W poniższej, drugiej części artykułu omówione są zagadnienia związane z obciążeniami wnoszonymi przez urządzenia elektryczne potrzeb własnych elektrowni, które w sytuacji awaryjnej zasilane są z agregatów, problemy regulacji prędkości obrotowej i synchronizacji, wymagań projektowych, zabezpieczeń przekaźnikowych, kwalifikacji producenta i prób w miejscu zainstalowania. Omówiono także zewnętrzne źródła zasilania elektrycznego zgodne ze strategia FLEX wprowadzone w konsekwencji wniosków wyciągniętych z katastrofy w Fukushimie, a także alternatywne jednostki zasilania zapasowego z napędami innych rodzajów niż spalinowe silniki wysokoprężne.

EN

We continue the topic of backup diesel generators in nuclear power plants, which we began in issue 3/2025 of the „BJOR Bulletin”. The second part of this article discusses issues related to the loads imposed by the power plant’s auxiliary electrical equipment, which in an emergency is powered by the Diesel generators, problems of speed control and synchronization, design requirements, relay protection, manufacturer qualifications, and on-site testing. External power sources consistent with the FLEX strategy, implemented as a result of lessons learned from the Fukushima disaster, are also discussed. Last but not least we present alternative backup power units powered by engines other than Diesels.

5

Zapasowe agregaty prądotwórcze z silnikami wysokoprężnymi w elektrowniach jądrowych. Część 1

Nowicki Jacek

Bezpieczeństwo Jądrowe i Ochrona Radiologiczna

|

2025

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nr 3 (137)

20--37

PL

Zapasowe agregaty prądotwórcze z silnikami Diesla są kluczowymi rezerwowymi źródłami zasilania w elektrowniach jądrowych, przede wszystkim w celu zapewnienia bezpiecznego wyłączenia reaktora w przypadku utraty zasilania zewnętrznego. Dostarczają one zasilanie do kluczowych systemów bezpieczeństwa, takich jak systemy chłodzenia rdzenia i systemy sterowania, zapobiegając uwolnieniu materiałów radioaktywnych. Zapasowe agregaty prądotwórcze są projektowane i testowane w taki sposób, aby były odporne na wstrząsy sejsmiczne i inne zakłócenia, zapewniając ich prawidłowe działanie w sytuacjach awaryjnych. W istocie urządzenia te stanowią jedna z ostatnich linii obrony w elektrowni jądrowej, chroniąc przed potencjalnymi zagrożeniami poprzez utrzymanie kluczowych systemów bezpieczeństwa w przypadku awarii innych źródeł zasilania.

EN

Emergency Diesel Generators (EDGs) are crucial backup power sources in nuclear power plants, primarily to ensure safe reactor shutdown in the event of a loss of external power. They provide power to key safety systems, such as reactor core cooling and control systems, preventing the release of radioactive materials. Backup generators are designed and tested to withstand seismic events and other disruptions, ensuring their proper operation in emergency situations. In essence, these devices constitute one of the last lines of defense in a nuclear power plant, protecting against potential threats by maintaining critical safety systems in the event of a failure of other power sources.

6

Operating peculiarities of standard coolin g systems of engines at high altitudes

Myrzakhmetov Beibit, Sładkowski Aleksander, Mashatayeva Gulzada

Transport Problems

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2024

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T. 19, z. 4

59--68

EN

The item under test was the engine without its standard facility-based cooling systems, the lack of which makes it impossible to operate as a power unit of a vehicle in a great majority of experimental research of internal combustion engines at high altitudes. The findings may create a wrong impression of the range of power ratings and economic parameters of the engine when operating at high altitudes because changes in atmospheric conditions exert an effect on the running efficiency of its standard systems as well. It is established that the efficiency loss of the cooling system may cause a forced power limitation of the engine as a result of the experimental research of the diesel engine equipped with all standard facility-based systems at very high altitudes. Thus, the shortage of power may significantly exceed the power loss of the engine due to air density reduction at high altitudes.

7

Evaluation of selected combustion parameters in a compression-ignition engine powered by hydrogenated vegetable oil (HVO)

Orliński Piotr, Sikora Mieczysław, Bednarski Mateusz, Laskowski Piotr, Gis Maciej, Wiśniowski Piotr

Combustion Engines

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2024

|

R. 63, nr 3

34--40

EN

The article carries out a detailed analysis and evaluation of indicators related to the combustion process (pressure and temperature in the engine combustion chamber, heat release rate, heat release fraction) in a JCB 444 TA4i compression-ignition engine fuelled with diesel and hydrogenated vegetable oil (HVO). During the empirical tests, the operation of the exhaust gas recirculation (EGR) system was stopped, and no other changes were made to the engine settings (factory settings were used). In the first stage, the empirical tests were carried out on the speed characteristics of an engine dynamometer. Then, an experiment was carried out at the engine crankshaft speed corresponding to the maximum torque - which consisted of determining the indicators related to the combustion process at a constant mass flow of fuel: diesel and HVO fuel. This provided information on the effect of hydrogenated vegetable oil on the combustion process in relation to the diesel engine feed. The conclusions drawn from the empirical study can be used to develop guidelines to change the operating map of a compression-ignition engine when it is fed with hydrogenated vegetable oil.

8

Optical-graphic studies of hydrogen additives’ effects on diesel fuel atomization parameters

Shalapko Denys

Transport Problems

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2023

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T. 18, z. 4

135--146

EN

This paper considers a promising method of enhancing the effectiveness of diesel engines. This method uses the addition of hydrogen in a small amount (up to 2% by mass). The hydrogen additive is added to the high-pressure fuel line before the injector. Based on the experimental findings, a reduction in the engine’s specific fuel consumption of up to 3% was achieved in comparison to the baseline configuration. A research study was conducted at the Admiral Makarov National University of Shipbuilding using a newly established experimental setup to assess the impact of hydrogen additives on primary fuel delivery, spray characteristics, and overall engine performance. Among the experiments conducted, one investigated fuel atomization parameters, focusing on how the presence of hydrogen in the fuel influenced the fuel jet’s characteristics. A high-speed camera with a high resolution was used to record the optical-graphic study to isolate and extract individual shots of the torch’s expansion, thus obtaining images devoid of ignition and flickering. After conducting image processing and constructing jet models, along with subsequent analysis, it becomes apparent that the addition of hydrogen to the primary fuel results in an enhancement of spray quality. The torch volume expanded by approximately 10% to 15%, while the jet length diminished by approximately 8% to 10%. Consequently, the average diameter of the atomized fuel droplets decreases by up to 10%, with the extent of reduction contingent upon the initial parameters and configurations.

9

Maszyny do budowy, naprawy i utrzymania dróg. Przegląd na podstawie układów rozrządu

Stawowiak Michał

Drogi Publiczne

|

2023

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nr 4

36--40

PL

Dzięki nowoczesnym maszynom drogowym praca przy budowie dróg może przebiegać sprawnie, wygodnie i bezpiecznie. W zależności od przeznaczenia sprzętu montuje się w nich różne rodzaje napędu. Przewagę mają tutaj silniki spalinowe, które odznaczają się wysoką mocą i pełną mobilnością. Potencjalni użytkownicy mają wybór miedzy prostymi i lekkimi silnikami benzynowymi a wytrzymałymi i mocnymi silnikami wysokoprężnymi.

10

Performance of a single cylinder direct injection 4-stroke diesel engine under effect of using diesel and naphtha blends

Basas Marwah E., Khalefa Rafeq A.

Advances in Mechanical and Materials Engineering

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2023

|

Vol. 40, nr 1

181--187

EN

The demand for diesel fuel in the transport industry is expected to rise due to greenhouse gas laws and global economic expansion, necessitating the search for alternative energy sources. If light distillate fuels can match diesel fuel's efficiency and cleanliness at a more affordable cost, they could potentially enter the market. The aim of the investigations was to assess a single cylinder, four stroke diesel engine's performance using various blends of diesel (D) and heavy naphtha (N): D100%, D97.5%N2.5%, D95%N5%, D92.5%N7.5%, and D90%N10%. Tests were conducted at 3000 rpm and variable loads, revealing that the maximum permissible naphtha content in diesel oil (D100%) is 10%. Higher naphtha proportions led to misfire and instability under heavy loads. 100% diesel demonstrated the lowest brake-specific fuel consumption and higher thermal efficiency, while mixture of 90% diesel and 10% naphtha showed the highest fuel consumption and lower thermal efficiency.

PL

Oczekuje się, że zapotrzebowanie na olej napędowy w branży transportowej będzie zwiększało się ze względu na przepisy dotyczące gazów cieplarnianych i globalną ekspansję gospodarczą, co wymusza poszukiwanie alternatywnych źródeł energii. Jeżeli lekkie destylaty będą w stanie dorównać wydajności i czystości olejowi napędowemu, przy bardziej przystępnej cenie, mogłyby potencjalnie zostać wprowadzone na rynek. Celem badań była ocena osiągów jednocylindrowego, czterosuwowego silnika wysokoprężnego stosując różne mieszanki oleju napędowego (D) i benzyny ciężkiej (N): D100%, D97.5% N2.5%, D95% N5%, D92.5% N7.5% i D90% N10%. Badani przeprowadzono przy 3000 obr/min i zmiennym obciążeniu. Wykazano, że maksymalna dopuszczalna zawartość benzyny ciężkiej w oleju napędowym wynosi 10%. Większa zawartość benzyny w oleju napędowym prowadziła do przerw w zapłonie i niestabilności pod dużym obciążeniem.100% olej napędowy wykazał najniższe zużycie paliwa przy hamowaniu i wyższą sprawność cieplną, podczas gdy mieszanina 90% oleju napędowego and 10% benzyny ciężkiej wykazała najwyższe zużycie paliwa i niższą sprawność cieplną.

11

Operational tests of a distributor injection pump

Bałon Paweł, Rejman Edward, Smusz Robert, Kiełbasa Bartłomiej

Mechanik

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2022

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R. 95, nr 11

42--46

EN

Research on drive units confirms that, as a result of many years of operation, the fastest-wearing components in diesel engines of machines and vehicles are in-line and distributor pumps. The durability of the pumps is several times shorter than that of the motors. A dozen or so different sizes and types of in-line injection pumps were used in diesel engines of vehicles, which significantly complicated the service capacity. The authors of the work created a pump that has a universal application and can be used interchangeably for many types of diesel engines and also meets the increased durability requirements. The analysis partially presents the results of operational tests of the pump working under load and the analysis of the causes of damage. Model studies of the contact stresses between damaged elements were also carried out.

PL

Badania zespołów napędowych potwierdzają, że do najszybciej zużywających się w wyniku wieloletniej eksploatacji podzespołów w silnikach wysokoprężnych maszyn i pojazdów należą pompy wtryskowe rzędowe i rozdzielaczowe. Trwałość pomp jest kilkakrotnie mniejsza od trwałości silników. W silnikach wysokoprężnych pojazdów stosowano kilkanaście różnych wielkości i rodzajów pomp wtryskowych rzędowych, co znacznie komplikowało możliwości serwisowe. Autorzy pracy skonstruowali pompę, która ma uniwersalne zastosowanie i może być montowana zamiennie w wielu typach silników wysokoprężnych, ponadto spełnia podwyższone wymogi trwałości. W analizie przedstawiono wyniki badań eksploatacyjnych pompy pracującej pod obciążeniem i przyczyny uszkodzeń. Przeprowadzono również badania modelowe naprężeń kontaktowych między elementami, które uległy uszkodzeniu.

12

Study of super/turbochager system for helicopter diesel engine

Prokhorenko Andriy, Vrublevskyi Oleksandr, Grytsyuk Oleksandr, Kuzmenko Anatolii, Kravchenko Sergii

Diagnostyka

|

2021

|

Vol. 22, No. 3

25--34

EN

The article demonstrates a rational scheme of the supercharging system in a helicopter diesel engine with a power of 100 kW, regardless of the flight altitude, and proposes a method for assessing the power losses for a diesel engine depending on the flight altitude using a mathematical model. There are three variants of an engine supercharger scheme with a single-stage turbocharger, a two-stage one with parallel or sequential compressor drive and a turbo-blower. As a result of the computational analysis according to the original method, it was shown that from the point of view of the least energy consumption two-stage scheme with a compressor and a sequential drive is the most rational. To reduce energy losses in the drive with two-stage supercharging, a concept for controlling the pressure system was proposed, which includes changing the rotational speed of the compressor drive and adjusting the throttles. Simulation of the engines running during the climb/descent of the helicopter showed that the proposed pressure scheme and control concept is effective. In order to improve the quality of regulation, the possibility to use an electric drive with the first stage compressor is being considered.

13

Self-Ignition Delay and Control Parameters of Diesel Engines for Different Vehicle Feeding Systems and Different Fuels

Lotko Wincenty

Advances in Science and Technology. Research Journal

|

2021

|

Vol. 15, no. 1

245--254

EN

The phenomena accompanying the self-ignition period have been the subject of extensive research in this area. They are usually carried out in constant volume pressure chambers or in reactors with constant air flow. Such tests are considered to be basic. The conditions in these tests are definitely different from those in compression ignition engines. Therefore, the comparison of the auto-ignition delay periods from test setups to those obtained from real engines raises a number of doubts. Because the self-ignition delay period determines the combustion process, a theoretical analysis was conducted, pertaining to a number of factors that have an impact on this process which determines the operational aspects of the engine, and thus its economics and ecology. The research object was a single-cylinder engine from AVL LIST GmbH in Graz, Austria. The engine is equipped with a Common Rail injection system. The test setup meets the following standards: Directive 1999/96/EC of the European Parliament and the Council of 13th December 1999, Regulation (EC) No 715/2007 of the European Parliament and the Council of 20th June 2007, as well as Commission Regulation (EC) No 692 /2008 of 18th July 2008. The analysis of the operational aspects of the self-ignition delay period was based on the results of tests on the AVL 5402 engine fueled with hydrocarbon fuels: diesel and synthetic oil. The engine was also fed with vegetable fuel – rapeseed oil. The obtained material from the tests warns the user of CI engines against the effects of their failure if the engine control parameters and the quality of fuel for its supply are not maintained as recommended by the manufacturers. The material contained in the publication is used for scientific analysis, and, which is worth emphasizing, is of a utilitarian nature.

14

Compression-ignition engine fuelled with diesel and hydrogen engine acceleration proces

Longwic Rafał, Woźniak Gracjana, Sander Przemysław

Combustion Engines

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2020

|

R. 59, nr 1

47--51

EN

The paper presents the results of research consisting in acceleration of a diesel engine powered by diesel and hydrogen. The test stand included a diesel engine 1.3 Multijet, hydrogen cylinders and measuring equipment. Empirical tests included engine testing at idle and at specified speeds on a chassis dynamometer, vehicle acceleration in selected gears from specified initial values of engine revolutions was also tested.. Selected parameters of the diesel fuel combustion and injection process were calculated and analyzed. The paper is a preliminary attempt to determine the possibility of co-power supply to diesel and hydrogen engines.

15

Impact-based piezoelectric energy harvesting system excited from diesel engine suspension

Caban Jacek, Litak Grzegorz, Ambrożkiewicz Bartłomiej, Gardyński Leszek, Stączek Paweł, Wolszczak Piotr

Applied Computer Science

|

2020

|

Vol. 16, no. 3

16--29

EN

Vibration energy harvesting systems are using real ambient sources of vibration excitation. In our paper, we study the dynamical voltage response of the piezoelectric vibrational energy harvesting system (PVEHs) with a mechanical resonator possessing an amplitude limiter. The PVEHs consist of the cantilever beam with a piezoelectric patch. The proposed system was subjected to the inertial excitation from the engine suspension. Impacts of the beam resonator are useful to increase of system’s frequency transition band. The suitable simulations of the resonator and piezoelectric transducer are performed by using measured signal from the engine suspension. Voltage outputs of linear (without amplitude limiter) and nonlinear harvesters were compared indicating better efficiency of the nonlinear design.

16

Unrepeatability of the Fuel Injection and Combustion Processes in the Diesel Engine Fuelled with Renewable Fuel

Lotko Wincenty

Advances in Science and Technology. Research Journal

|

2020

|

Vol. 14, no. 4

68--77

EN

Despite the fact that more than a hundred years have passed since the first design of the compression ignition (CI) engine appeared, its optimal design has not yet been achieved. It is still the subject of constant modernisation in order to meet the new expectations of users in terms of its dynamics, economy, and, in recent months, also ecology. The most effective fulfillment of these requirements is achieved through new solutions of the fuel supply system and electronic control of injection and combustion processes. The publication includes the test results obtained on the basis of two engines. One of them is the single-cylinder CI engine AVL5402, and the other one – a threecylinder CI engine AD3.152. The first one is equipped with the Common Rail fuel supply system, electronically controlled with the selenoid injector. The second engine has a CAV distributor fuel injection pump and traditional, mechanical controlled injectors. The paper demonstrates how these two different structural systems for supplying and controlling engine parameters affect the selected indicators of the injection and combustion process. The influence of diesel fuel (DF) and rapeseed oil (RO) feeding the engine in both different injection and control systems on the unrepeatibility of the injection pressure on the maximum combustion pressures in the engine cylinder and, consequently, non-uniformity of the crankshaft rotational movement of the engine were also pointed out. The continuation of the research in this area seems to be expedient. They can be supplemented with statistical models of these phenomena. The results obtained in this way could be helpful in optimising the design of power supply systems and engine combustion chambers.

17

Stress Concentration Analysis of the Injection Pump Shaft

Bałon Paweł, Świątoniowski Andrzej, Rejman Edward, Kiełbasa Bartłomiej, Smusz Robert, Szostak Janusz, Kowalski Łukasz

Advances in Science and Technology. Research Journal

|

2020

|

Vol. 14, no. 2

155--162

EN

The paper presents the methodology for designing the injection shaft drive for diesel engines with 2,3,4,6 and 8 cylinders as well as power from 2.5 to 52 kW per cylinder using the FEM method and experimental research. The pump is the original solution of the authors. The shaft is a basic part of the pump with a complex structure. In order to assess the state of stress in the shaft, the FEM analytical method was used and experimental tests were carried out, subjecting the shaft to torsional moment resulting from the transmitted power. Experimental studies confirmed the results of numerical calculations and the correctness of the adopted solution. The destructive tests were carried out to assess the maximum load capacity of the shaft, loading it with an increasing torque until visible plastic deformations occurred. This condition appeared at twice the moment (Ms = 602 Nm) in relation to the maximum predicted moment in operation (extreme operating conditions of the pump shaft). The theoretical studies confirmed very significant stress concentration (αk coefficient at the level of 2.63 or even 4.7), which may be the cause of fatigue cracks. It also determines the strength of the shaft and its torsional stiffness, which influences the proper functioning of the pump and ensures adequate fuel injection phases.

18

Simulation Research of the Influence of Compression Ratio on the Performance of an Aircraft Piston Diesel Engine

Grabowski Łukasz, Karpiński Paweł, Magryta Paweł

Advances in Science and Technology. Research Journal

|

2020

|

Vol. 14, no. 3

175--181

EN

In recent years, the opposed-piston engines have become increasingly popular in the automotive and aerospace industries. Therefore, it is necessary to conduct the research on this type of drive. The paper presents the simulation research of a two-stroke opposed-piston diesel engine designed for propulsion of light aircrafts. The influence of the change of the compression ratio on the selected engine performance was investigated (indicated mean effective pressure, peak firing temperature and pressure, specific fuel consumption, power consumed by the compressor). The AVL BOOST software was used to perform the simulation tests. A zero-dimensional engine model equipped with a mechanical compressor was developed. On the basis of the created model, a series of calculations was performed for the assumed values of the compression ratio for four engine operating points: take-off power, maximum continuous power and cruising power at two different altitudes. The obtained results were subjected to a comparative analysis and the most important conclusions connected with the influence of the change in the compression ratio on the achieved performance were presented.

19

Selected Issues of the Internal Combustion Engine Turbocharger Operation

Lotko Wincenty, Lechowski Marcin

Advances in Science and Technology. Research Journal

|

2020

|

Vol. 14, no. 2

223--232

EN

A combustion engine turbocharger works in most difficult conditions due to high temperatures of the fuels it is driven by, vibrations and high rotational speeds of its shaft up to 200 thousand rpm. In addition, under these conditions, there are difficulties with lubrication of the blade axes. Thus, the combustion engine turbocharger is exposed to the damages occurring during the engine operation process. The frequency of damages was determined on the basis of tests for a selected group of vehicles. The object of detailed author’s own research was the Audi 3.0 V6 TDI engine of the Audi A6 C6 car which cooperated with a Borg Warner turbocharger with a variable angle of turbine steering wheel blades. These positioners are also exposed to adverse conditions: mainly vibrations and high temperatures. They are subjected to frequent damages, which often affect the engine control parameters. An analysis of the positioner element damage as well as a group of testers to assess their technical condition was made. The evaluated testers were allowed only to determine the efficiency of the turbocharger, but without indicating its technical condition or its positioner separately. Consequently, the author’s own research methodology and the construction of a new tester for the electromechanical turbocharger adjuster was developed. The necessary tests for the vehicle mileage up to 350,000 km were carried out. The self-designed tester can also estimate the degree of electromechanical wear of the positioner in the engine supercharging system as well as the resistance of its movements resulting from the pollution of the VTG turbocharger mechanism with the turbine steering wheel positioner, with variable geometrical parameters.

20

Nitrogen Oxides Emissions from a Diesel Engine Fuelled with Water-Diesel Microemulsions

Górska Milena, Skrzek Tomasz

Advances in Science and Technology. Research Journal

|

2020

|

Vol. 14, no. 3

83--92

EN

In this study, an experiment was conducted to examine the AVL research diesel engine using two kinds of waterdiesel (W-D) fuel microemulsions. These W-D mixtures contained 3.5 and 7.0% by volume (%, v/v) of distilled water dispersed in regular diesel fuel meeting the requirements of the EN590 standard. The engine was tested under the conditions of low, moderate and higher loads. This research was focused on the emission characteristics of nitrogen dioxide (NO2 ) and nitrogen monoxide (NO). Cumulative emission of NOx was also analyzed before being further discussed. The obtained results of this study showed that the addition of distilled water to the regular diesel fuel has a minor effect on the variation of the nitrogen oxides emission. It was confirmed that NO is the main component of NOx detected in the exhaust stream of the AVL engine fuelled with all tested fuels. It proves that the thermal mechanism of the nitrogen oxides formation was dominant in the combustion process. Moreover, it was found that the addition of water dispersed as microemulsion in diesel fuel had a minor effect on the reduction of the NOx emission.