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Wyszukujesz frazę "internal combustion" wg kryterium: Temat


Tytuł:
Considerations for starting combustion engines with AC machines
Autorzy:
Monroy, Mauricio
Romero, Carlos A.
Henao, Edison
Powiązania:
https://bibliotekanauki.pl/articles/2174476.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
internal combustion engine
starter motor
AC machine
torque requirements
ISG
supercapacitor
silnik spalinowy
rozrusznik
maszyna prądu przemiennego
superkondensator
Opis:
To initiate its combustion cycles, internal combustion engines require a minimum rotational speed that can be given from several sources (muscular, electrical, pneumatic, among others). Advantages of initiating an ICE with an AC electrical machine is that it can integrate starter motor and generator in one device, provide a linear ramp of acceleration when starting, and assist the ICE in torque production. This article illustrates considerations for the design of a starting system with an AC electrical machine. Initially, criteria of torque, rotational speed and power requirements are analysed, considering resistances of compression, friction, and inertia of the slider-crank mechanism, as well as accessories, with a preliminary experimental validation. Also, types of three-phase AC electrical machines are put to comparison, as well as their associated electronic components needed for driving them in each case, concluding that AC induction machines require a complex 4-quadrant inverter. PM synchronous machines require a simpler inverter, but with highly specified power electronics components. The classical wound rotor machine requires the simplest inverter, with unidirectional power flow, less power transfer losses and less critical power electronics components. Finally, considerations for using of a battery assisted with supercapacitor as complementary DC power source are made.
Źródło:
Diagnostyka; 2023, 24, 1; art. no. 2023102
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Empirical study of the effect of the air filter on the performance and exhaust emissions of a diesel engine
Autorzy:
Dziubak, Tadeusz
Karczewski, Mirosław
Dziobek, Ilona
Powiązania:
https://bibliotekanauki.pl/articles/24202461.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
internal combustion engine
air filter pressure drop
engine power
specific fuel consumption
exhaust emissions
silnik spalinowy
spadek ciśnienia w filtrze powietrza
moc silnika
jednostkowe zużycie paliwa
emisja spalin
Opis:
The results of an experimental study of the effect of the pressure drop of the air filter pf on the operating parameters and exhaust emissions of a modern CI internal combustion engine of a truck equipped with an electronically controlled power system are presented. The tests were carried out for an air filter with a clean filter cartridge Δpf0 = 0.58 kPa and with a cartridge contaminated after a service mileage (about 50 thousand km) ΔpfD = 2.024 kPa. In each test, engine performance, exhaust emissions and relative change in emissions were determined: CO, NOx, HC, CO2, H2O. It was found that an increase in the filter resistance pf causes a decrease in the filling degree by 12%, engine useful power by almost 10%, exhaust gas temperature by a maximum of 30oC and an increase in specific fuel consumption by almost 5%. Air filter resistance has no significant effect on NOx emissions and HC concentration. There is a reduction in H2O emissions by up to 7%, CO by up to 13% and CO2 by up to 4%, and an increase in oxygen emissions by 15%, depending on operating conditions.
Źródło:
Combustion Engines; 2023, 62, 2; 94--111
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of exhaust emissions from the gasoline engine of a light duty vehicle in the Real Driving Emissions test
Autorzy:
Andrych-Zalewska, Monika
Chlopek, Zdzislaw
Pielecha, Jacek
Merkisz, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/24200821.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
internal combustion engine
pollutant emission
RDE test
Monte Carlo method
Opis:
The article contains the research results and analysis of the processes that take place as part of a gasoline engine light duty vehicle Real Driving Emissions test. Dimensionless characteristics of exhaust emission and fuel mass consumption in the RDE test were also determined: emission intensity, particle number emission intensity, fuel mass consumption intensity. An algorithm for determining the characteristics specific distance pollutant emission, specific distance particle number and specific distance fuel mass consumption in the vehicle speed domain in the RDE test was presented using the Monte Carlo method. The determined characteristics were approximated by polynomial functions in the form of sets of points. These relationships were characterized by a large dispersion of values, which was primarily due to the fact that the random values of the averaging limits contain very different engine operating conditions.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 2; art. no. 165880
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical optimization of the BAT-CELL Bio-Ambient-Tests method for engine exhausts toxicity evaluation
Autorzy:
Kęska, Aleksandra
Janicka, Anna
Zawiślak, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/24202411.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
internal combustion engine
Euro norms
new method
in vitro tests
silnik o spalaniu wewnętrznym
normy europejskie
nowa metoda
badania in vitro
Opis:
The BAT-CELL Bio-Ambient-Tests method is based on the assessment of the influence of the actual toxicity of various types of gas mixtures on living cells, taking into account the additive synergism. Work has been carried out on the application of the BAT-CELL method for testing engine exhaust gases. The application of computational fluid mechanics using Ansys Fluent made it possible to analyse the flow of engine exhaust gases through the aspiration system used, including analysis of shear stress values and their uniformity distribution on the bottom wall of the sampler containing cell culture on the bottom wall of the sampler. The appropriate flow rate of exhaust gases through the aspiration system and the shape of aspiration tubing for the sampler were selected in order to enable uniform contact of gas particles with the cell surface and not to damage them mechanically. The simulation results were verified in real-life tests and confirmed the theoretical assumptions.
Źródło:
Combustion Engines; 2023, 62, 1; 19--25
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Outline of history and comparative analysis of internal combustion engines for flying models
Autorzy:
Pełczyński, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/24202452.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
internal combustion engines
model engine
history of model engines
comparative
flying models
silniki spalinowe
silnik modelarski
historia silników modelarskich
porównanie
modele latające
Opis:
The article discusses the most important facts from the history of the development of miniature aircraft engines and carries out their comparative analysis. Already in the 1930s, the structural system characteristic of model engines was established, which has hardly changed to this day. The following sections compare the various types of engines: two-stroke and four-stroke engines, spark-ignition engines, glow plug engines, engines with a push-pull cylinder arrangement, radial and in-line engines. The comparisons of the parameters and operational indicators of such engines presented in the tables allowed for the assessment of the advantages and disadvantages of individual engines, making several observations and drawing some more general conclusions.
Źródło:
Combustion Engines; 2023, 62, 2; 36--44
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantumness in diagnostics of marine internal combustion engines and other ship power plant machines
Autorzy:
Girtler, Jerzy
Rudnicki, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/34602291.pdf
Data publikacji:
2023
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
diagnostics
stochastic proces
internal combustion engine
random variable
Opis:
The article provides proof that the diagnostics of marine internal combustion engines and other ship power plant machines should take into account the randomness and unpredictability of certain events, such as wear, damage, the variations of mechanical and thermal loads, etc., which take place during machine operation. In the article, the energy $ E $, like the other forms (methods) that it can be converted into (heat and work), is considered the random variable $ E_t $; at time $t$, this variable has the mean value $ \overline{E}_t $, which is the observed value of the statistic $ \overline{E}_{st} $ with an asymptotically normal distribution $ N ( E(E_t), \frac{ \sigma_t }{ \sqrt{n} } ) $, irrespective of the functional form of the random variable $E_t$. A proof is given that shows that the expected value estimated in the above way, considering the time t of the performance of task Z by a marine internal combustion engine or other ship power plant machine, can be used to determine the machine’s possible action (DM). When compared to the required action (DW) needed for task Z to be performed, this possible action makes it possible to formulate an operating diagnosis concerning whether the engine or machine of concern is able to perform task Z. It is assumed that an energy device of this type is able to perform a given task when the inequality DM≥DW holds. Otherwise, when DM < DW, the device cannot perform the task for which it was adopted in the design and manufacturing phase, which means that it is in the incapability state, although it still can be started and convert energy into the form of heat or work.
Źródło:
Polish Maritime Research; 2023, 4; 110-119
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research of pollutant emissions from automotive internal combustion engines in conditions corresponding to the actual use of vehicles
Autorzy:
Andrych-Zalewska, Monika
Powiązania:
https://bibliotekanauki.pl/articles/24202464.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
pollutant emission
vehicles
internal combustion engines
emisja zanieczyszczeń
pojazdy
silniki spalinowe
Opis:
The subject of the article is the study of pollutant emissions from automotive combustion engines that operate in conditions corresponding to the actual use of vehicles. Includes information on the properties of exhaust gas parameters characterizing the following features: energy, economic, environmental impact and serviceability, additional and constant. Reference was also made to the possibility of determining driving tests on the basis of the similarity of the frequency characteristics of the speed processes in both driving tests and in the real use of vehicles. The article presents the results of research on pollutant emissions from a passenger car during the RDE test. The emission of carbon monoxide, hydrocarbons, nitrogen oxides, particulate matter and carbon dioxide, as well as the number of particulate matter, were examined. The process of pollutant emission intensity and particle number intensity was presented. Tests were carried out on the statistical properties of the car speed, the intensity of pollutant emissions, and the intensity of the number of particulate matter. Correlation studies were carried out on the speed of the vehicle, the intensity of pollutant emissions, and the intensity of the number of particulate matter.
Źródło:
Combustion Engines; 2023, 62, 2; 64--70
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A methodology for non-invasive diagnosis of diesel engines through characteristics of starter system performance
Autorzy:
Ramírez, Juan D.
Romero, Carlos A.
Mejía, Juan C.
Quintero, Héctor F.
Powiązania:
https://bibliotekanauki.pl/articles/2096186.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
internal combustion engines
engine diagnosis
starting system
starting process
silniki spalinowe
diagnozowanie silników
układ rozruchowy
Opis:
In this work, a methodology to diagnose ten diesel bus engines is carried out by means of some characteristics of the starting system performance. The signals of battery voltage, electric current supplied to the starter motor and crankshaft revolutions during cold and warm engine starting processes are analysed. Characteristics and patterns of the signals that are attributable to engine compression and combustion failures are pointed out, which are related to the kilometres travelled by each vehicle after the last engine repair and the shutdown time of the engine in warm condition. It is obtained that the rise of the current required by the starter motor during the second and third compression process, and the mean crankshaft angular acceleration after the second compression process are characteristics that are related to the engine condition.
Źródło:
Diagnostyka; 2022, 23, 2; art. no. 2022202
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing the topicality of the problem related to the explosion of crankcases in marine main propulsion engines (1972–2018)
Autorzy:
Wiaterek, Daniel
Chybowski, Leszek
Powiązania:
https://bibliotekanauki.pl/articles/24202539.pdf
Data publikacji:
2022
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
crankcase explosion
fire safety
human casualties
marine diesel engine
main engine
marine engine
prime mover
main propulsion system
incident
accident
internal combustion engine
trunk piston engine
crosshead engine
Opis:
The purpose of this paper is to present the results of a query aimed at assessing the validity of the topic of crankcase explosions prevention in the main marine engines. The study takes into account the engine type, engine manufacturer, ship’s age, accident severity, ship’s location at the time of the incident, and the share of fatal accidents in the analyzed population of crankcase explosions. One of the primary hazards associated with offshore and deep-sea ship operations – and primarily ship power plants – are fires and explosions that result in accidents and incidents with an average frequency of 60 days. This paper discusses the actuality of crankcase explosion hazards in the main propulsion engines of various types of sea vessels. The assessment was made based on the results of a statistical analysis of historical data from 1972 to 2018. The methodology consisted of three stages: (1) a selection query to obtain the source data, (2) analysis of the obtained results (data separation, extraction of additional information, and statistical analysis), (3) synthesis of the obtained information, and drawing conclusions about the numerical indicators describing the statistical distribution of individual events for the given evaluation criteria. The analysis showed that the risk of crankcase explosions affects ships of all ages – both in crosshead (31%) and trunk piston engines (61%) – and that the number of serious incidents (67%) remained constant over the investigated period. Half of all incidents occurred on vessels younger than 15 years old. 58% of explosions took place in engines of the most popular prime movers manufacturers. The probability that a main engine crankcase explosion will result in injury or death is 17.34%.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 71 (143); 33--40
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the kinetics of changes in selected physicochemical indicators of engine oil in operation
Autorzy:
Chmielewski, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/2097596.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
internal combustion engine
cylinder liner
engine oil
kinematic viscosity
silnik o spalaniu wewnętrznym
tuleja cylindrowa
olej silnikowy
lepkość kinematyczna
Opis:
The article presents the results of operational tests of engine oil, including the observation of changes in the values of selected physicochemical parameters of oil in subsequent operation cycles, in accordance with the service life specified by the vehicle manufacturer. Preliminary analysis of defined indicators characterizing the condition of engine oil were performed in terms of their suitability for the ongoing monitoring of the technical condition of the engine. On the basis of the values of selected indicators of fresh oil recorded in the course of operational tests and during replacement, one indicator was selected, the kinematic viscosity at 100°C, for which an unambiguous trend of changes was observed during the tests. The last stage was to verify the hypothesis about the correlation between the observed changes in the value of the indicator and the mileage of the engine-vehicle.
Źródło:
Combustion Engines; 2022, 61, 1; 24--29
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnosing faults in the timing system of a passenger car spark ignition engine using the bayes classifier and entropy of vibration signals
Autorzy:
Czech, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2203067.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
internal combustion engines
diagnostics
Bayesian classifier
pattern recognition
spark-ignition internal combustion engine
exhaust valve of the internal combustion engine
silniki spalinowe
diagnostyka
klasyfikator bayesowski
rozpoznawanie wzorca
silnik spalinowy z zapłonem iskrowym
zawór wydechowy silnika spalinowego
Opis:
Today's systems for diagnosing the technical condition of machines, including vehicles, use very advanced methods of acquiring and processing input data. Presently, work is being conducted globally to solve related problems. At the moment, it is not yet possible to create a single procedure that would enable the construction of a properly functioning diagnostic system, regardless of the selected object to be diagnosed. Hence, there is a need to conduct further research into the possibility of using already developed methods, as well as their modification to other diagnostic cases. This article presents the results of research related to the use of the Bayes classifier for diagnosing the technical condition of passenger car engine components. Damage to the exhaust valve of a spark ignition engine was diagnosed. The source of information on the technical condition was vibration signals recorded at various measuring points and under different operating conditions of the car. To describe the nature of changes in the vibration signals, the entropy measures were determined for the decomposed signal using the discrete wavelet transform is proposed.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2022, 116; 83--98
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of compression ignition engine preheating on its performance under cold start conditions
Autorzy:
Gęca, Michał Jan
Radica, Gojmir
Powiązania:
https://bibliotekanauki.pl/articles/2097617.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
internal combustion engine
engine warm-up
cold start
CO2 emissions
fuel consumption
silnik o spalaniu wewnętrznym
nagrzewanie silnika
zimny rozruch
emisje CO2
zużycie paliwa
Opis:
This paper examines the effect of an external preheating system for an internal combustion engine on fuel consumption, CO2 emissions, and cabin temperature of a Euro4 vehicle. A 1 kW electric system powered by 220 V was installed in series in the cooling system of a vehicle with a compression-ignition engine of 2.5 dm3 capacity. The tests were carried out in simulated urban driving conditions (distance of 4.2 km), extra-urban driving conditions (distance of 17 km), and during idling at cold-start temperatures ranging from -10oC to 2oC. Preheating the engine under simulated city conditions reduces fuel consumption by 2.64 dm3/100 km and increases the supply air temperature immediately after engine start-up. Due to the preheater being powered from an external power grid, the cost per trip and total CO2 emissions are increased. Assuming renewable energy sources, CO2 emissions would be reduced the most for the stationary tests after engine preheating. In contrast, emissions would be reduced the least for extra-urban driving.
Źródło:
Combustion Engines; 2022, 61, 1; 67--74
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the ratios of the main indicators of the dry sealing of the cylinder-piston group of internal combustion engines using a solid lubricant
Autorzy:
Nuralin, Beket
Kuanyshev, Murat
Murzagaliev, Akhmet
Kaukarov, Altynbek
Utebayev, Isatai
Powiązania:
https://bibliotekanauki.pl/articles/2203866.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
wear
internal combustion engine
resource forecasting
cylinder-piston group
dry ring sealing
graphite paste with liquid glass
zużycie
silnik spalinowy
prognozowanie zasobów
grupa cylinder-tłok
suche uszczelnienie pierścienia
pasta grafitowa z płynnym szkłem
Opis:
This article presents the results of a study of an alternative method for reducing friction losses in the cylinder-piston group of internal combustion engines based on an experimental installation, taking into account changes in the real state of the working surfaces of the mating parts of the piston ring-cylinder pair depending on the operating time. The factors with a progressive effect on the operation of engine friction units as they wear out are studied, and the degree of their influence on wear is estimated. A model of the friction unit of a cylinder-piston group (piston-piston ring pair) of an internal combustion engine based on a solid antifriction material operating without the use of a lubricating fluid is developed and investigated. Comparative results of determining the wear indicators of sealing rings by various methods of wear control are presented. A method for predicting the resource and the real state of the engine is proposed.
Źródło:
Transport Problems; 2022, 17, 3; 99--110
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical methodology for evaluation the combustion and emissions characteristics on WLTP in the light duty dual-fuel diesel vehicle
Autorzy:
Kneba, Zbigniew
Stepanenko, Denys
Rudnicki, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/2097638.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
dual-fuel engine
drive cycle simulation
internal combustion engine
emission reduction
alternative fuels
WLTP
silnik dwupaliwowy
symulacja cyklu jazdy
silnik o spalaniu wewnętrznym
ograniczanie emisji
paliwa alternatywne
Opis:
The worldwide aim of reducing environmental impact from internal combustion engines bring more and more stringent emission regulations. In 2017 by EU has been adopted new harmonized test procedure called WLTP. In general terms this test was designed for determining the levels of harmful emissions and fuel consumption of traditional and hybrid cars. This procedure contains specific driving scenarios which representing real-life driving patterns. Test cycles contain vehicle velocity versus time profiles and directly in powertrain analysis on the test benches cannot be used. In order to back calculate drive cycles to engine rpm versus torque profiles a simple longitudinal vehicle dynamics method was used in this paper. Moreover, in order to determine most representative engine operation points during WLTP a density based grid clustering method was implemented. The experimental part of the study focuses on the comparative evaluation of the effect of various diesel to LPG substitution ratios (0% LPG, 10% LPG, 20% LPG and 30% LPG) on combustion and emission characteristics of dual-fuel diesel engine.
Źródło:
Combustion Engines; 2022, 61, 2; 94--102
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance evaluation of a single cylinder compressed air engine: an experimental study
Autorzy:
Hanan, Ahmad
Feroze, Tariq
Arif, Awais
Iftikhar, Hasan
Khan, Afzaal A.
Javaid, Sarmad
Powiązania:
https://bibliotekanauki.pl/articles/2105994.pdf
Data publikacji:
2022
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
internal combustion engines
compressed air engine
engine analysis
single cylinder engine
Opis:
The quest to reduce dangerous environmental emissions has led to the research and use of alternate and renewable energy sources. One of the major contributors to the dangerous environmental emissions is the automotive industry. The world is, therefore, quickly moving towards hybrid and electric vehicles. An alternate pollution-free automotive engine is a compressed-air engine, which is powered by compressed air and is more efficient than the electric engine since it requires less charging time than a traditional battery-operated engine. Furthermore, the tanks used in compressed-air engines have a longer lifespan in comparison to the batteries used in electric vehicles. However, extensive research is required to make this engine viable for commercial use. The current study is a step forward in this direction and shows the performance analysis of a single-cylinder compressed-air engine, developed from a four-stroke, single-cylinder, 70 cc gasoline engine. The results show that compressed-air engines are economic, environmental friendly and efficient.
Źródło:
Acta Mechanica et Automatica; 2022, 16, 2; 119--123
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł

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