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    Wyświetlanie 1-13 z 13
    Tytuł:
    Design of novel composite pistons for diesel engine
    Autorzy:
    Jankowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/247362.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    internal combustion engine
    diesel engine
    piston engine
    composite alloy
    combustion engine performance
    Opis:
    The paper presents the requirements to be met by diesel engines and their components, in particular pistons for engines of military vehicles. These requirements are related to the mass of modern military vehicles, which has greatly increased. Materials for the piston should have a good strength properties and low hysteresis of thermal expansion coefficient α across the range of operating temperatures, good resistance to galling, low abrasion, low coefficient of friction and good functional properties. On the clearance of the piston in the cylinder, the coefficient of thermal expansion α and its hysteresis has a decisive influence. The paper includes information on the piston working clearances, the requirements for pistons materials, their chemical composition, standard materials for the forged pistons, for the cast pistons (silumin alloys) and for the composite pistons. The paper presents the changes in coefficient of thermal expansion for the alloy in the raw state and after heat treatment and pistons made of new composite material prior to motor testing and after these tests. The completed new pistons have a lower coefficient of thermal expansion and lower hysteresis α, which allows reducing the running piston and cylinder clearances with the resulting effects.
    Źródło:
    Journal of KONES; 2014, 21, 4; 211-216
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Verification of the precise position of the aircraft in air navigation based on the solution of the RTK-OTF technique
    Autorzy:
    Kowalski, M.
    Jankowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/242780.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    internal combustion engine
    Diesel engine
    engine piston
    composite alloy
    thermal stability
    Opis:
    Certain results of the comparative studies of the high-speed Diesel engine V-12 of the “W” series were presented in the article. The engine was modernised in regard of possibilities to achieve better performances at specific fuel consumption, smaller exhaust emission, smaller scavenge, lower noise and better thermal stability. The subject of this work is the piston cast of novel composite silumin. The development of novel composite silumin (aluminium-silicon alloy), which contains a little more Copper and Nickel, and the introduction of novel alloyed elements, such as Chromium, Molybdenum, Tungsten, increases the strength of the alloy and its thermal stability during successive heating and cooling. The pistons made of this alloy may have a little bigger outside diameter than the pistons made of PA-12 standard alloy, and a smaller clearance between the piston and cylinder liner. The pistons made of standard and novel alloy were mounted successively in the "W" engine. The full load and part load curves were determined. The lubrication oil consumption, fuel consumption, exhaust emission, blow-by and noise were determined too. The article presents the results of the above-mentioned research. The novel composite alloy enables further engine modernization because the engine should operate at higher pressure and temperature in the combustion chamber.
    Źródło:
    Journal of KONES; 2017, 24, 4; 99-108
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research performance of novel design of diesel engine
    Autorzy:
    Kowalski, M.
    Jankowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/949487.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    internal combustion engine
    Diesel engine
    engine piston
    composite alloy
    thermal stability
    Opis:
    Certain results of the comparative studies of the high-speed Diesel engine V-12 of the “W” series were presented in the article. The engine was modernised in regard of possibilities to achieve better performances at specific fuel consumption, smaller exhaust emission, smaller scavenge, lower noise and better thermal stability. The subject of this work is the piston cast of novel composite silumin. The development of novel composite silumin (aluminium-silicon alloy), which contains a little more Copper and Nickel, and the introduction of novel alloyed elements, such as Chromium, Molybdenum, Tungsten, increases the strength of the alloy and its thermal stability during successive heating and cooling. The pistons made of this alloy may have a little bigger outside diameter than the pistons made of PA-12 standard alloy, and a smaller clearance between the piston and cylinder liner. The pistons made of standard and novel alloy were mounted successively in the "W" engine. The full load and part load curves were determined. The lubrication oil consumption, fuel consumption, exhaust emission, blow-by and noise were determined too. The article presents the results of the above-mentioned research. The novel composite alloy enables further engine modernization because the engine should operate at higher pressure and temperature in the combustion chamber.
    Źródło:
    Journal of KONES; 2017, 24, 4; 99-108
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of indication errors of the SI gas engine with a prechamber
    Analiza bledow indykowania gazowego silnika ZI z komora wstepna
    Autorzy:
    Jamrozik, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/793719.pdf
    Data publikacji:
    2011
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    engine
    two-stage combustion system
    excess air factor
    indicated work
    gas engine
    prechamber
    thermal process
    internal combustion engine
    spark ignition
    piston engine
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical optimization of the ignition angle of SI engine
    Numeryczna optymalizacja zaplonu w silniku spalinowym ZI
    Autorzy:
    Jamrozik, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/793708.pdf
    Data publikacji:
    2011
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    internal combustion engine
    ignition advance angle
    numerical optimization
    fuel mixture
    numerical modelling
    combustion process
    piston engine
    spark ignition engine
    fuel supply system
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Określenie wpływu nieszczelności przekroju tłok-pierścień -cylinder na wielkość strat ładunku
    Determining influence of piston-ring-cylinder profile on blow-by
    Autorzy:
    Abramek, K. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/347858.pdf
    Data publikacji:
    2010
    Wydawca:
    Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
    Tematy:
    tłok
    pierścienie
    silnik spalinowy
    szczelność
    przedmuchy gazów
    piston
    rings
    internal combustion engine
    tightness
    blow-by
    Opis:
    W referacie przedstawiono modelowanie zmian szczeliny przekroju występującego pomiędzy tłokiem, pierścieniami i tuleją cylindrową, która wpływa na intensywność zjawiska przedmuchów gazów do skrzyni korbowej tłokowego silnika spalinowego o zapłonie samoczynnym. Zmiana szczeliny, przez którą przedostaje się część czynnika, spowodowana jest wzajemnymi ruchami tłoka i pierścieni zarówno względem siebie, jak i względem gładzi cylindra.
    This paper presents the modelling of changes of the slot between a cross-section of the piston, the rings and cylinder liners, which affects the intensity of the phenomenon of blow-by into the crankcase piston engine ignition. Changing the slot through which a part of the factor passes is caused by the reciprocal motion of the piston and rings, both against each other as well as against the cylinder strokes.
    Źródło:
    Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2010, 4; 7-14
    1731-8157
    Pojawia się w:
    Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
    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:
    Modeling of the burning process in the piston engines with various concepts of the working proces
    Autorzy:
    Natriashvili, Tamaz
    Kavtaradze, Revaz
    Glonti, Merab
    Powiązania:
    https://bibliotekanauki.pl/articles/1841216.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    internal combustion engine
    piston engine
    diesel engine
    gas engine
    modeling
    verification
    burning model
    silnik spalinowy
    silnik tłokowy
    silnik diesla
    silnik gazowy
    modelowanie
    weryfikacja
    model spalania
    Opis:
    In this paper, the results of modeling of the burning process in the piston engines whose working process is realized on the basis of various conceptual approaches are presented: in diesel with direct injection of the fuel; in a gas engine with spark ignition; and in a two-fuel engine (in the gas-diesel), where the mixture of natural gas and air ignites with the help of the fuse dose of the diesel fuel. The models of burning based on the different in-principle approaches are analyzed and used. Verification of the models is performed by a comparison of the results of modeling with the experimental diagrams. The specific values of the empirical coefficients, used in modeling of the burning proces in the engines under study, are determined. The practical recommendations on the choice of the burning model depending on the working process conception are given.
    Źródło:
    Transport Problems; 2020, 15, 1; 39-48
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research and analysis of the results of the internal combustion engine locomotive during the 85-hour endurance test
    Autorzy:
    Borkowska, J.
    Kaźmierczak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/245178.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    friction pair
    internal combustion engine
    piston
    ring
    cylinder
    tribological properties
    coating
    EMD645
    endurance test
    diamond powder
    Opis:
    Piston – ring – cylinder assembly of combustion engine has many friction pairs examples, also one of them which decide about fastness to wear, it means first sealing ring – cylinder, called further very simply ring – cylinder unit. During work of this unit, we can observe wear of piston, precisely – of coating which is deposited on ring to prolong service life. Objective of this work was to realize a test of set durability of railway engine EMD645 with power about 1300 kW. Within the framework of this test were investigated a prototyped piston’s rings with diamond embankment. Piston rings are made of diamond coating technology with a porous chromium coating, where in pores is deposited on said diamond powder with a grain size about 1 micron. The work will be carried out of an analysis of collaboration piston – rings – cylinder unit in internal combustion engine and an analysis of the use of hard materials in friction pairs, including powders. Will be performed research of material and description of diamond powder, which will be applied to the piston rings. After stability, testing in the locomotive engine EMD645 on the basis of the collected results will be developed conclusions of the wearing intensity on piston ring and relating them to the requirements for coatings. The work aims to show the possibilities and benefits of the application of new protective coatings on structural elements of the internal combustion engine in order to reduce their wearing, which is consistent with the observed trend of technology development.
    Źródło:
    Journal of KONES; 2016, 23, 2; 53-59
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact evaluation of piston rings mobility on a gas passage in an internal combustion engine (ICE)
    Autorzy:
    Zarenbin, Volodymyr
    Kolesnikova, Tatiana
    Sakno, Olha
    Ollo, Vasyl
    Klimenko, Victor
    Powiązania:
    https://bibliotekanauki.pl/articles/196457.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    ring seal
    internal combustion engine
    piston ring mobility
    calculation of gas escape
    uszczelnienie pierścieniowe
    silnik spalinowy
    ruchliwość pierścieni tłokowych
    obliczenie wycieku gazu
    Opis:
    To estimate the effect of the axial movement of piston rings in the piston grooves on the blow-by in the internal combustion engine (ICE) by an experiment- calculated method. This contributes to the development of practical recommendations for the further improvement of the engine ring seal designs. Abstract theorems were used when modelling the effect of the axial movement of piston rings in the piston grooves on the blow-by in an ICE. They are based on the fundamental theory of heat engines, thermodynamics and hydraulics. The ICE running was analysed using design-theoretical research methods. The effect of the axial movement of piston rings in the piston grooves on the blow-by in the ICE was established. This creates prerequisites for a more accurate assessment of their sealing capacity and for ways to further improve them. Calculated dependences for computing the blow-by depending on the positional relationship of the rings in the piston grooves were obtained. The dependences of gas escapes on the engine crankshaft speed were obtained, which is especially important for idling modes by which one can judge the dynamic stability of the ring seal and solve the problems of improving its service properties. The calculated dependences for evaluation of the blow-by depending on the positional relationship of the rings in the piston grooves and their respective possible gas flows in the ring seal were obtained for the first time. The practical method for estimating the dynamic stability of the ring seal by decencies of gas escape on the crankshaft rotation speed in ICE was proposed.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2019, 104; 187-201
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Description of a rig for the testing of a prototype engine with a pneumatic energy accumulator
    Opis stanowiska do badań prototypu silnika z pneumatycznym akumulatorem energii
    Autorzy:
    Głogowski, M.
    Pawelski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1365045.pdf
    Data publikacji:
    2011
    Wydawca:
    Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
    Tematy:
    czujnik laserowy
    pneumatyczny akumulator energii
    silnik spalinowy
    stopień sprężania dodatkowy tłok
    compression ratio
    internal combustion engine
    laser sensor
    pneumatic energy accumulator
    secondary piston
    Opis:
    The principle of operation of an engine with a pneumatic energy accumulator and a test rig built at the Technical University of Lodz, Department of Vehicles and Fundamentals of Machine Design, have been presented in this paper. The test rig was used to test a two-stroke spark-ignition IC engine with a prototype energy accumulator situated in one of the engine cylinders. The instantaneous position of the secondary piston of the energy accumulator was measured with the use of a laser sensor fixed on the cylinder head and the measurement system has been described in this paper. A graph with typical curves representing the engine cylinder pressure and the movement of the secondary piston in the pneumatic energy accumulator has been included, too. Many attempts have already been made to provide the spark-ignition IC engine with devices of various kinds in order to improve engine performance characteristics. However, none of the solutions proposed have found wider practical application. In the case of a pneumatic energy accumulator with the new design concept as presented here, a broad spectrum of development possibilities can be seen. Therefore, this article will be the first in a series dedicated to the testing and modelling of a spark-ignition engine with a pneumatic accumulator.
    W artykule przedstawiono zasadę działania silnika z pneumatycznym akumulatorem energii oraz stanowisko zbudowane w Katedrze Pojazdów i Podstaw Budowy Maszyn Politechniki Łódzkiej. Na stanowisku przebadano dwusuwowy silnik spalinowy o zapłonie iskrowym z prototypowym pneumatycznym akumulatorem energii, umieszczonym w jednym z cylindrów silnika. Pomiar położenia dodatkowego tłoka z akumulatora był realizowany czujnikiem laserowym zamocowanym na głowicy i został opisany w artykule. Zamieszczono również typowy przebieg ciśnienia w cylindrze i ruchu dodatkowego tłoka w pneumatycznym akumulatorze. Silnik spalinowy o zapłonie iskrowym w swojej historii był już wielokrotnie wyposażany w różnego rodzaju urządzenia mające poprawiać jego parametry, ale próby nie znalazły szerszego zastosowania. W przypadku pneumatycznego akumulatora energii przedstawionego w artykule widać szerokie spektrum możliwości otwierające się przed nową konstrukcją, dlatego artykuł ten będzie pierwszym z cyklu artykułów poświęconych badaniu i modelowaniu silnika o zapłonie iskrowym z pneumatycznym akumulatorem.
    Źródło:
    Archiwum Motoryzacji; 2011, 4; 45-53
    1234-754X
    2084-476X
    Pojawia się w:
    Archiwum Motoryzacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza dynamiki układu tłokowo-korbowego wybranego silnika spalinowego przy użyciu interfejsu programów MSC.ADAMS i ANSYS
    Analysis of dynamics of the piston-crank system of a selected internal combustion engine with the use of the MSC.ADAMS and ANSYS software interface
    Autorzy:
    Harlecki, A.
    Urbaś, A.
    Nowakowski, J.
    Byrski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/133574.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    dynamika
    silnik spalinowy
    układ tłokowo-korbowy
    interfejs programu MSC.ADAMS
    interfejs programu ANSYS
    dynamics
    internal combustion engine
    piston-crank system
    MSC.Adams software
    ANSYS software
    Opis:
    W pracy przedstawiono metodę analizy wytrzymałościowej członów układu tłokowo-korbowego wybranego silnika spalinowego o zapłonie samoczynnym, stanowiącego przykład układu mechanicznego o szybkozmiennej dynamice. W analizie dynamiki układu, zrealizowanej w środowisku programów MSC.ADAMS i ANSYS, uwzględniono podatność wszystkich jego podstawowych członów, tzn. tłoka wraz ze sworzniem tłokowym, korbowodu i wału korbowego. Finalną część analizy stanowiły obliczenia wytrzymałościowe wymienionych członów. Zdaniem autorów, prezentowana metoda może być użyteczna w nowocześnie pojmowanym procesie projektowania silników spalinowych.
    The paper presents a method of stress analysis of components of the piston-crank system of a selected internal combustion engine as an example of the mechanical system with quick-changing dynamics. In the analysis of the dynamics of the system, carried out in the MSC.ADAMS and ANSYS software environment, the flexibility of all the major members of the system, i.e. piston with piston pin, connecting rod, and crankshaft, was taken into account. The final part of the analysis includes calculations of strength of the aforementioned system members. In authors’ opinion, the method presented may be useful in the up-to-date process of designing internal combustion engines.
    Źródło:
    Combustion Engines; 2013, 52, 3; 1076-1083
    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
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