Temat: piston combustion engines - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Multidimensional engine starting characteristics
Autorzy:: Pszczółkowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/949496.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: piston combustion engines
low temperature starting
Opis:: The difficulties in obtaining the start of piston combustion engines increase at low temperature conditions. Lowering abilities of a diesel engine to undertake the independent operating, at low temperature, result from its influence on exploitation materials, engine systems properties, and directly from low ering the temperature of sucked-up into the engine cylinders air. The successful engine start-up depends on three independent parameters: engine (and ambient) temperature, engine crankshaft rotational speed extorted by starting system and the time period at which this system is operating. An individual engine starting abilities measure can be the time of starter motor operating at aparticular temperature or its start-up limit temperature determined according to a specified research standard. The dependence of start-up time or start-up limit temperature on any particular factor is the engine starting characteristic. The combustion engine is a very complex object in respect of its starting abilities. If the engine constructionai adjustment and exploitation parameters are changed, the start-up characteristic (function) is a multi-dimensional function. Formally, from mathematical point of view, it is a surface in a multidimensional space. It is possible to obtain any engine starting characteristic by multidimensional starting surface intersection. In the paper there are presented examples of one- and multi- dimensional diesel engine starting characteristics as results of long-lasting starting tests of many engines.
Źródło:: Journal of KONES; 2010, 17, 3; 385-392
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Field of pressure in zone contact elements assembly PRC stationary quantification
Autorzy:: Tkaczyk, M.
Kaźmierczak, A.
Kaźmierczak, Ł.
Górniak, A.
Powiązania:: https://bibliotekanauki.pl/articles/246221.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: piston combustion engines
PRC systems
CFD
Opis:: One of the most common worldwide rubbing couple which performs plane-turning motion is a pair of selling rings - cylinder sleeve of a Piston - Ring- Cylinder (PRC) system of a combustion engine. It explains the necessity of performing investigations concerning the phenomenon occurring in rubbing couple PRC. One of the most important issues is the friction losses as well as losses of the working medium from the combustion chamber. Mathematical models of gas flow in the PRC are described in the literature differ in the way of description and scope of the phenomena taken into account. In this paper approach to determine the flow spaces between the rings considering the effect of the geometry of the PRC system has been proposed. Investigation conducted with aid of CFD (Computational Fluid Dynamics) were aimed on determination of flow resistance within the surface between the piston, rings, and cylinder liner. Aim of the study was achieved - The pressure field. it has been found that it is possible to determine the pressure field in the space of the PRC system basing on the approximation of the generalized transport equations for a discrete geometric model using the finite volume method. The precision of the results depends on the account in the form of boundary conditions as well as external conditions.
Źródło:: Journal of KONES; 2011, 18, 3; 463-471
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Ecological indicators of the perkins 1104D-e44TA engine after its adaptation for being powered with natural gas and diesel fuel
Autorzy:: Kurczyński, D.
Łagowski, P.
Warianek, M.
Powiązania:: https://bibliotekanauki.pl/articles/244009.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: piston combustion engines
engine fuels
harmful exhaust gases components
bi-fuelling
natural gas
experimental tests
Opis:: The contemporary progress of automotive industry and transportation is determined to a large extent by the increasing environmental requirements, aimed at limiting the harmful impact of vehicles upon human life and people’s health. A crucial issue linked with operating vehicles is the exhaust gases generated by internal combustion engines. In order to reduce this hazardous impact upon the natural environment, the construction of the engines is continuously improved, electronic controlling is being developed for managing the course of working processes taking place in cylinders and auxiliary systems, exhaust gases cleaning systems are being developed, alternative fuels are being sought for and the possibilities of their optimal use are being examined. Natural gas is the fuel that is highly expected and hoped to be used more widely for powering internal combustion engines in vehicles. This article presents the values of selected ecological indicators of the Perkins 1104D-E44TA Diesel engine, powered by compressed natural gas and Diesel fuel (CNG + ON). For comparison reasons, the engine was powered with both fuels at the same time and then only by Diesel fuel (ON) in the same working conditions. Before the tests, the powering system control unit had been calibrated so as to enable obtaining similar values of torque while the engine was powered with the Diesel fuel only and with both CNG and ON while working with external speed characteristics; the calibration was also set up to allow for the maximum share of the natural gas in the total fuel amount supplied into the engine cylinders without engine knocking. When powering the engine with both CNG and Diesel fuel, the concentration levels of nitric oxides and carbon dioxide in exhaust gases were lower. However, the total content of hydrocarbons in the exhaust gases grew multiple times, and the content of the carbon monoxide was significantly increased. In addition, the obtained measurement results of the smokiness of the exhaust gases and the content of the soot with the engine powered with two fuels were not satisfactory.
Źródło:: Journal of KONES; 2017, 24, 3; 143-150
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Zastosowanie gliceryny do zasilania tłokowych silników wysokoprężnych dużej mocy
Application of glycerine for powering piston diesel engines of large power
Autorzy:: Rychlik, A.
Kibalczyc, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/133915.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: gliceryna
spalanie gliceryny w tłokowych silnikach spalinowych
emisja zanieczyszczeń gazowych
glycerine
glycerine combustion in piston combustion engines
gaseous pollution emission
Opis:: Na całym świecie produkcja gliceryny jest coraz większa ze względu na stale rosnące zapotrzebowanie na biodiesla. Na każdą tonę wyprodukowanego biodiesla uzyskuje się 100-110 kg gliceryny, jako produktu ubocznego. Istnieje wiele metod i sposobów wykorzystania powstałej gliceryny, począwszy od przetwarzania jej na inne produkty w przemyśle farmaceutycznym, chemicznym itp., poprzez dodawania jej do paliw czy bezpośredniego spalania w silnikach spalinowych. W przypadku bezpośredniego spalania gliceryny w tłokowych silnikach wysokoprężnych występuje problem niskiej liczby cetanowej paliwa glicerynowego, która utrudnia proces spalania w silnikach spalinowych. W artykule przedstawiona została metoda spalania gliceryny w silniku wysokoprężnym, bez potrzeby stosowania paliwa pilotażowego lub dodatków poprawiających wartość cetanową gliceryny jako paliwa. Przedstawione zostaną ponadto, wyniki badań eksploatacyjnych emisji zanieczyszczeń gazowych i wielkości zużycia paliwa agregatu prądotwórczego składającego się z silnika MTU V652 i prądnicy AvK typ DIDB140, zasilanego paliwem w postaci oleju napędowego oraz gliceryną techniczną 98,5% obciążonego mocą do 1200 kW.
All over the world glycerine production is growing due to continuously increasing demand for biodiesel. For every ton of produced bio-diesel 100-110 kg of glycerine is obtained as a by-product. There is many methods and ways of use of the obtained glycerine, beginning with processing it into other products in pharmaceutical industry, chemical industry and others, through adding it to fuels or direct combustion in engines. In case of direct combustion of glycerine in piston diesel engines there exists a problem of the low cetane number of glycerine fuel which makes difficult burning it in combustion engines. The paper will present the method of glycerine combustion in a diesel engine with-out necessity of using pilot fuel or additives improving the cetane number of a fuel in the form of glycerine. Additionally, there will be presented the results of the operational research of gaseous pollution emission and fuel consumption by the electric power generator consisting of: MTU V652 engine and AvK DIDB140 generator powered by diesel oil and 98.5 % technical glycerine. The unit was loaded up to 12000 kW power.
Źródło:: Combustion Engines; 2015, 54, 3; 644-648
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: On the possible increasing of efficiency of ship power plant with the system combined of marine diesel engine, gas turbine and steam turbine in case of main engine cooperation with the gas turbine fed in parallel and the steam turbine
Autorzy:: Dzida, M.
Mucharski, J.
Powiązania:: https://bibliotekanauki.pl/articles/258706.pdf
Data publikacji:: 2009
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: marine power plants
combined systems
piston internal combustion engines
gas turbine
steam turbine
Opis:: The article presents a concept of a combined large-power ship propulsion system, composed of the leading internal combustion main engine associated with a power gas turbine and the steam turbine system, both utilising the energy taken from the main engine exhaust gas. In the examined variant the power turbine, arranged in parallel with a turbocharger, is fed with the exhaust gas from the exhaust manifold. A calculation algorithm is presented, along with sample calculations for particular subsystems: supercharging, gas power turbine, and steam turbine system. Assumptions were formulated for the calculations, and were complemented by the adopted limits. Selected system parameters were confronted with the experimental investigations available in the literature. The performed power optimisation of the entire combined marine power plant took only into account the thermodynamic point of view, leaving aside technical and economic aspects. The numerical calculations were performed for the 52 MW low-speed marine diesel engine.
Źródło:: Polish Maritime Research; 2009, 2; 40-44
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Research of combustion system with semiopen combustion chamber in a commercial spark ignition engine
Badania systemu spalania z półotwartą komorą spalania w silniku produkcyjnym o zapłonie iskrowym
Autorzy:: Leżanski, T.
Sęczyk, J.
Wolański, P.
Powiązania:: https://bibliotekanauki.pl/articles/245775.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: SI engines
combustion
combustion chamber of piston engines
exhaust emission
Opis:: During the research of a new combustion system with semi-open combustion chamber for SI engines with use of the rapid compression machine (RCM) and visualisation experimental engine (VEE) it was proved that the application of this system results in shortening of the combustion time, increasing of the maximum cycle pressure and, in effect, increase of the combustion efficiency. The aim of the research using a commercial spark ignition engine was to prove that the similar results (as in RCM and VEE) could be obtained in a wide range of automotive engine operating parameters. In this research the two cylinder, four stroke air cooled SI engine, with volume displacement 650 cm3 from Fiat 126 motorcar was used. This engine was fitted with a modified cylinder head and ignition distributor. Two types ofprechamber with different shape were installed in different locations into the cylinder head but the ignition distributor had fixed, preadjusted, ignition advance angle in the full range of engine speed. The wide open throttle characteristics including power, specific fuel consumption and exhaust emission versus engine speed and load characteristics including: specific fuel consumption and exhaust emission versus engine torque were determined for different ignition advance angles. In the lower range of the ignition advance angle the engine showed stable operation at lower speed but unstable at high speed and, inversely, if the ignition advance angle was high the engine operation was stable at the higher speed and unstable at the lower. The engine characteristics during unstable operation were deteriorating. The research results show that improvement of the engine characteristics can be obtained in the full range of operating parameters ifthe ignition advance angle is varied continuously with the variation of engine speed. The ignition advance angle for the engine fitted with the new combustion system, which was subject of this research, was different form the ignition advance angle for standard engine.
W badaniach prowadzonych przy zastosowaniu maszyny pojedynczego sprężu oraz badawczego silnika wizualizacyjnego, stwierdzono, że zastosowanie systemu z półotwartą komorą spalania może spowodować: skrócenie czasu spalania w komorze spalania, zwiększenie ciśnienia maksymalnego cyklu oraz zwiększenie sprawności spalania. Celem badAn w silniku produkcyjnym było wykazanie, że takie pozytywne efekty można uzyskać również w szerokim zakresie parametrów pracy trakcyjnego silnika spalinowego. Badania prowadzono przy zastosowaniu silnika samochodu Fiat 126p. W badaniach stosowano dwie różne głowice, w których zainstalowano w różnych miejscach i o różnym kształcie wstępną komore spalania oraz zmodernizowany aparat zapłonowy. Określono charakterystyki zewnętrzne i obciążenlowe przy różnych konfiguracjach komory spalania, różnych wartościach kąta wyprzedzenia zapłonu dla dwóch wartości współczynnika nadmiaru powietrza. W przypadku małych wartości kąta wyprzedzenia zapłonu uzyskiwano poprawę osiągów oraz zmniejszenie toksyczności spalin w zakresie niskich prędkości obrotowych, natomiast silnik pracował niestabilnie w zakresie wysokich prędkości obrotowych i odwrotnie, kiedy stosowano wysokie wartości kąta wyprzedzenia zapłonu uzyskiwano poprawę osiągów w zakresie wysokich prędkości obrotowych, natomiast silnik pracował niestabilnie w zakresie niskich wartości prędkości obrotowych. Uzyskane wyniki pokazują, że dzięki zastosowaniu systemu z półotwartą komorą spalania, o właściwie dobranych parametrach systemu, można uzyskać poprawę osiągów silnika oraz zmniejszenie toksyczności spalin w całym zakresie pracy silnika trakcyjnego
Źródło:: Journal of KONES; 2009, 16, 3; 203-211
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Research of combustion system with semi-open combustion chamber in a commercial spark ignition engine
Autorzy:: Leżański, T.
Sęczyk, J.
Wolański, P.
Powiązania:: https://bibliotekanauki.pl/articles/246474.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: SI engines
combustion
combustion chamber of piston engines
exhaust emission
Opis:: During the research of a new combustion system with semi-open combustion chamber for SI engines with use of the rapid compression machine (RCM) and visualisation experimental engine (VEE) it was proved that the application of this system results in shortening of the combustion time, increasing of the maximum cycle pressure and, in effect, increase of the combustion efficiency. The aim of the research using a commercial spark ignition engine was to prove that the similar results (as in RCM and VEE) could be obtained in a wide range of automotive engine operating parameters. In this research the two cylinder, four-stroke air-cooled SI engine, with volume displacement 650 cm³ from Fiat 126 motorcar was used. This engine was fitted with a modified cylinder head and ignition distributor. Two types of prechamber with different shape were installed in different locations into the cylinder head but the ignition distributor had fixed, preadjusted, ignition advance angle in the full range of engine speed. The wide-open throttle characteristics including power, specific fuel consumption and exhaust emission versus engine speed and load characteristics including: specific fuel consumption and exhaust emission versus engine torque were determined for different ignition advance angles. In the lower range of the ignition advance angle the engine showed stable operation at lower speed but unstable at high speed and, inversely, if the ignition advance angle was high the engine operation was stable at the higher speed and unstable at the lower. The engine characteristics during unstable operation were deteriorating. The research results show that improvement of the engine characteristics can be obtained in the full range of operating parameters if the ignition advance angle is varied continuously with the variation of engine speed. The ignition advance angle for the engine fitted with the new combustion system, which was subject of this research, was different form the ignition advance angle for standard engine.
Źródło:: Journal of KONES; 2016, 23, 4; 283-290
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Some effects of applying a new type of pistons for SU12-U diesel engine
Autorzy:: Jankowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/246313.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: internal combustion engines
compression ignition engines
exhaust emissions
combustion engine piston
piston materials
testing of combustion engines
Opis:: In the task of research and development of internal combustion engines, the strong emphasis is placed on reducing emissions of harmful substances in exhaust gases, which include carbon monoxide (CO), unburned hydrocarbons (HC), nitrogen oxides (NOx), particulate matter (PM, PN); while maintaining a high engine performance and, above all, adequate: power, fuel consumption, noise. One of the possibilities to reduce emissions of HC and engine working noise is to reduce the clearance between the piston and the cylinder liner. This is possible only, when the permanent deformations of the piston are reduced, which result from rapid piston temperature changes (thermal shocks). The newly developed composite aluminum alloy is characterized by high strength parameters and low dimensional hysteresis during repeated heating and cooling. The S12-U engine pistons are made of this material, and they had a slightly larger nominal diameter than the standard pistons. They were then mounted in the engine. The engine was tested on a test stand with the modern, accurate measuring equipment. Test results show, that the HC and CO content in the exhaust gas has been reduced, exhaust gas blowby to the crankcase declined, smoke emission was reduced and engine lubricating oil consumption was also reduced. Analysis of test results indicates that this has been achieved, mainly by reducing the clearances between the piston and the cylinder. The article provides detailed test results, mainly in the form of charts, on which one can compare the results, achieved by the engine with new material pistons with results of the same engine, but with the standard pistons.
Źródło:: Journal of KONES; 2016, 23, 4; 167-174
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Nowoczesne stanowisko do badań strategii sterowania i zasilania współczesnych silników o ZI
Modern experimental set-up for investigations into strategies for the control and fueling of spark ignition engines
Autorzy:: Ambrozik, A.
Ambrozik, T.
Kurczyński, D.
Łagowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/133511.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: tłokowy silnik spalinowy
wskaźniki pracy silnika
badania hamowniane
paliwa silnikowe
internal combustion piston engines
engine operation parameters
bench tests
engine fuels
Opis:: Tłokowym silnikom spalinowym stawiane są coraz większe wymagania, których celem jest ograniczenie ich szkodliwego wpływu na środowisko naturalne co jednocześnie stymuluje kierunki rozwoju silników spalinowych. W przypadku silników o zapłonie iskrowym dotyczy to przede wszystkim ograniczenia emisji tlenków azotu oraz tlenków węgla i węglowodorów. Ograniczenie emisji szkodliwych składników spalin przez te silniki uzyskuje się między innymi poprzez zastosowanie skomplikowanych układów oczyszczania splin. W ostatnich latach obserwuje się zainteresowanie także paliwami alternatywnymi a przede wszystkim - gazowymi jak LPG czy CNG. Jest to związane także z malejącymi światowymi zasobami ropy naftowej. W artykule przedstawiono wyniki hamownianych badań silnika o zapłonie wymuszonym Fiat 0.9 TwinAir produkowanego w Bielsku Białej przez Firmę Fiat Powertrain Technologies Poland . Podczas badań silnik zasilano standardową benzyną 95 oktanową oraz gazem LPG. Badania przeprowadzono na stanowisku hamownianym wyposażonym w hamulec elektrowirowy EMX–100/10000 zbudowanym w Laboratorium Silników Cieplnych Politechniki Świętokrzyskiej. Zakres badań obejmował wyznaczenie wskaźników ekonomiczno-energetycznych i ekologicznych silnika takich jak stężenia NO_x, HC, CO i CO₂ w spalinach przy pracy silnika według zewnętrznej charakterystyki prędkościowej i przy jego fabrycznych ustawieniach regulacyjnych.
Internal combustion piston engines have to comply with increasingly stricter requirements which are intended to limit their detrimental effect on the natural environment. At the same time, however, those provide a stimulus for the development of internal combustion engines. For positive ignition engines, the requirements primarily concern reduction in the emissions of nitrogen oxides, carbon oxides and hydrocarbons. In those engines, decreased emissions of the harmful components of the exhaust gas are achieved, among others, by complex exhaust aftertreatment systems. In recent years, increased interest in alternative fuels, mainly LPG or CNG, is observed. That is also related to the depletion of crude oil resources. The paper presents the results of the bench tests on Fiat 0.9 TwinAir positive ignition engine produced in Bielsko Biała by Fiat Powertrain Technologies Poland. In the tests, the engine was fuelled by regular 95-octane petrol and by LPG. The tests were performed at the bench equipped with the AMX 100 eddy current brake, constructed at the Heat Engine Laboratory of the Kielce University of Technology. The test range included the determination of economic, energy and environmental parameters of the engine, including NO_x, HC, CO i CO₂ concentrations in the exhaust gas when the engine operated at full load and had factory settings for control.
Źródło:: Combustion Engines; 2015, 54, 3; 1030-1035
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: The numerical calculation module for piston rings
Autorzy:: Kaźmierczak, A.
Tkaczyk, M.
Powiązania:: https://bibliotekanauki.pl/articles/245797.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: tribology
piston ring
bearing surface
simulation
combustion engines
Opis:: The piston with piston rings and bearing surface is a self-contained and highly complex tribological system. One of the most widespread global friction pairs traversed by reciprocating a pair of ring - cylinder liner piston - rings - cylinder internal combustion engine. Group PRS combustion engine is the solution generating considerable friction. Various researchers estimate the share of friction losses, per node piston rings - cylinder liner, at 19 to 60% of the total friction losses in the combustion engine. This paper describes part of a larger program to reduce wear the set working parts (piston, piston ring and bearing surface). The project is implemented through the development of new designs of piston rings with anti-wear coating that contains synthetic diamond in the form of loose embedded in a coating of chromium (PRS). The aim of the authors was to present the methodology used to compute characterized by a particular procedure. In practical use FEM software is used and the FVM. Developed and implemented Piston Rings Calculation Module is compatible with the idea of numerical computational methods is to say: functionally consists in carrying out a calculation of the desire to achieve the exact solution (the nearest is real) by conducting and receiving intermediate solutions (the next).
Źródło:: Journal of KONES; 2015, 22, 3; 301-307
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Some problems pistons made from composite materials with small hysteresis to combustion engines
Autorzy:: Jankowska-Sieminska, B.
Powiązania:: https://bibliotekanauki.pl/articles/245555.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
combustion engine piston
composite alloys
thermal expansion
hysteresis
Opis:: Novel composite ma hysteresisterials on the pistons are characterised that they occur in them multiple intermetallic phases which crystallize in the high temperature, before crystallization of the alfa+beta (Al+Si) eutectic. For forming of pre-eutectic phases, chromium and molybdenum are introduced to silumins, and for derivation of multiple increased concentration of nickel and copper and decreased concentration of magnesium are accomplished. On the basis of evaluations of mechanical and thermal loads of combustion engines pistons applying essence of composite materials of combustion engines pistons, as well requirements for combustion engines pistons, especially high loaded engines are expressed. Test results of hardness, influence of temperature of casting, test results of mechanical properties, friction coefficient and coefficient of thermal expansion are presented in the paper. The special attention devoted to so called hysteresis coefficient of thermal expansion and hysteresis of the relative elongation in function temperature and time. Courses of coefficient of thermal expansion for standard and composite material are presented. Differences of the a coefficient during heating and cooling in function temperature are relative to kind of heat treatment. Two-stage heat treatment is beneficial for the obtainment small values of the a coefficient.
Źródło:: Journal of KONES; 2011, 18, 3; 123-128
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: Research results of novel composite materials with low hysteresis during heating and cooling for pistons of combustion engines
Autorzy:: Sieminska, B.
Powiązania:: https://bibliotekanauki.pl/articles/245037.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: internal combustion engines
engine piston
thermal expansion
emissions
Opis:: Research results of novel silumins on pistons for combustion engines, which have high mechanical properties within the range of piston higher operating temperatures, 100-300°C, are presented in the paper. Silumins contain enlarging concentration of the nickel and copper alloy additives up to 4.0, and chrome and molybdenum alloy additives up to 1.0%. Occurrence of given microstructure in piston-silumins results in almost the same values of the coefficient thermal expansion during the heating up to the 300 °C temperature and during the next cooling into the ambient temperature. Small values of the coefficient of expansion of thermal and small differences between values of the coefficient of thermal expansion during heating and cooling enable on application of small values of working clearances between piston and the cylinder liner. As a consequence they make possible, the low exhaust emission level, and the low noise level. The pistons from alloys with small values ofthe coefficient of thermal expansion, small differences of this coefficient during heating and cooling are novel aspects presented in paper. Research results of strength and metallographic parameters, research results of the coefficient of thermal expansion, comparative engine research results are represented in the paper. In particular representative chemical components for a standard alloy and novel alloy, mechanical properties investigated alloys after solution heat treatment, wear resistance of novel alloy compared with two cast irons, ATD curves, fibrous construction, silicon construction, microstructure of novel alloy, courses of changes of the coefficient of thermal expansion in the function of the temperature during heating and cooling are presented in the paper.
Źródło:: Journal of KONES; 2010, 17, 1; 421-432
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 13.

Tytuł:: The impact of a place for the measurement of cylinder pressure of marine piston engine on the indicator diagrams and indicator parameters
Autorzy:: Witkowski, Kazimierz
Wysocki, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/241929.pdf
Data publikacji:: 2019
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diagnostics
marine piston engines
self-ignition engines
indication
middle indicated pressure
combustion pressure
Opis:: The article discusses one of the most popular methods of diagnosing selected damages of marine piston engines, which is the indication or measurement of pressure changes in the engine’s combustion chamber. Improving the quality of indicator diagrams may contribute to the increase in the efficiency of using the parameters indicated in the diagnostics of marine piston engines. Measurement errors during engine indication are primarily caused by measuring channels that connect the combustion chamber to the pressure sensor. One way to avoid these errors is to install the pressure sensor directly in the combustion chamber. It seems that it is possible to eliminate these errors. However, there is a risk that the pressure sensor will be damaged by the effect of high temperature on it during combustion of the fuel-air mixture in the engine’s combustion chamber. The article presents the results of tests that indicate that the measured temperatures in the place where the sensor was installed (in the combustion chamber) did not exceed the critical value specified by the pressure sensor manufacturer. The article also presents the results of cylinder pressure measurement not only in the combustion chamber but also in two other points - on the thread of the indicator cock and in the measuring channel between the indicator cock and the cylinder head. The tests were carried out in a wide range of engine load technically efficient and with simulated damage in the fuel injection system. The article presents a comparative analysis of the parameters read out of the indicator diagram for the three abovementioned pressure measurement locations. It was shown that the pressure measurements carried out directly in the combustion chamber are free from errors resulting from the influence of measuring channels and indicator cock.
Źródło:: Journal of KONES; 2019, 26, 2; 181-188
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 14.

Tytuł:: High-quality silumin on pistons of combustion engines
Autorzy:: Jankowski, A.
Pietrowski, S.
Sieminska, B.
Szymczak, T.
Powiązania:: https://bibliotekanauki.pl/articles/245889.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
piston
composite alloys
heat treatment
thermal expansion
hysteresis
Opis:: In the paper the test results are presented for the AlSH2Cu5Ni5MgO.5CrO.05MoO.05WO.05VO.05 newly worked out silumin close to eutectic piston-silumin with the elevated content ofcopper and nickel to approx. 5% with relation to generally applied the AISH2 piston silumin. The novel silumin contains also Cr, Mo, In and V micro alloy additions in quantity approx. 0.05 percent for every element. Research of microstructure, HB hardness and coefficient of lineal thermal expansion a for the AlSil2Cu5Ni5MgO.5CrO.05MoO.05WO.05VO.05 silumin in the cast state, after the separation strengthening and additional short duration high-temperature heat-treatment were performed. Research of the microstructure of the AlSH2Cu5Ni5MgO.5CrO.05MoO.05WO.05VO.05 silumin showed the occurrence in it following constituent phases: alfa(Al), beta(Si), Al2Cu and AlMoCrWVMgNiSiCuFe. The separation strengthening brought about the coagulation of silicon emissions. The short duration high-temperature heat-treatment caused additional coagulation of silicon emissions and also its coalescence. Measurement of the HB hardness showed high hardness investigated alloy in the rough state, approx. 30% higher from the AlSi2 piston silumin. Measurement of the a coefficient of thermal expansion showed beneficial effects of novel alloy connected with the value decreasing of this coefficient as well so called hysteresis. Further studies on novel alloy will concentrate on alloy-additional and processes of the heat treatment.
Źródło:: Journal of KONES; 2009, 16, 4; 563-573
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 15.

Tytuł:: Comparison the piston air engine performance with aviation gasoline (Avgas) or the E-85 ecological fuel supply
Autorzy:: Balicki, W.
Irzycki, A.
Snopkiewicz, K.
Powiązania:: https://bibliotekanauki.pl/articles/243897.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: nternal combustion engine
piston air engines
ecological fuels
exhaust pollutant
Opis:: The fuel presently used for feeding of aircraft piston engines (petrol including TEL) is characterized by "strong unfriendliness" for environment. Many research centres have been going on fuels investigation, which could substitute Avgas utilized in aviation. This is why are there no being in force for Europe standards defining the allowable emission of pollutions in exhaust gases of aircraft piston engines (equivalent to EURO - standards introduced for traction engines). The mixtures of gas o line and alcohols are tested as "alternative" aircraft fuels for spark ignition engines, and in case of Diesel engines - evenjet kerosene. During the research works on test bed carried out at Institute of Aviation the performance offour-stroke aircraft carburettor piston engine supplied by "classical" aircraft petrol and the E - 85 fuel (mixture of petrol and ethanol) were compared. Except for measuring the functional parameters of engine (rotational speed, torque, specific fuel consumption, pressures and temperatures) the emissions of gaseous pollutants incorporated in exhaust gas were measured and analyzed. The range of modifications of engine supply system - necessary to introduce in case of changing of fuel type within the tested engine -was worked up. There are foreseen comparative test of fuelling the engine with mixtures of petrol and alcohols in different proportions in the next phase of research works.
Źródło:: Journal of KONES; 2010, 17, 3; 25-32
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 16.

Tytuł:: Novel engine of higher efficiency
Autorzy:: Siemińska, B.
Drew, J.
Powiązania:: https://bibliotekanauki.pl/articles/242762.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
combustion engines
constant volume combustion chamber
dual heat path
non moving piston
Opis:: The idea of the new engine results that is possible increasing of the work efficiency of the engine. novel engine of higher efficiency development and the novel method of cylinder filling, piston stop study, dual heat path, piston cooling, combustion chamber pressure development in the constant volume phase, stress containment in the non moving piston, emissions with the direct injection installation. The creature of the solution consists in the realization the process of the combustion at the constant of the volume combustion chambers. It is realized with a piston stand during the period of combustion process. This permits on maximum pressure increasing and average indicated pressure. The enlargement of the efficiency is obtained, and finally - decrease of fuel consumption. Whereas at such itself average indicated pressure, the maximum decrease appears. This development's intention is to answer the question of alternate method of production of mechanical power from the expanding medium. The novel engine of higher efficiency development and novel engine of higher efficiency patents address the means and methods of exchange of spent or burned gasses for the fresh charge of air or fuel-air mixture in the two stroke configuration using the circular cross section pistons like the conventional four and two stroke engines mentioned above and the practical method of stopping the piston mid cycle that will create a constant volume combustion chamber for the duration of the combustion process.
Źródło:: Journal of KONES; 2007, 14, 4; 409-416
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 17.

Tytuł:: Optical analysis of failure of combustion engines elements
Autorzy:: Karczewski, M.
Koliński, K.
Walentynowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/244604.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
3D scanning
piston failure
triangulation principle
poligonization
Opis:: Methodology of analysis of damages of piston combustion engines by using 3D scanner enabling threedimensional analysis of such damages was introduced in the study. The principle of the device operation and his investigative possibilities were introduced. Presented is a phased process of scanning. The possibilities of the method were analyzed on examples of the damaged pistons for this engine supplied by fuel with low octane number. Precision of the damage measurements were estimated. The piston is one of the busiest part of the engine. The effects of wear on its surface are irregular and difficult to quantify. Geometric shape changes are related to: - movement of material in the case of dry friction due to accidents, - loss of material due to burnout, - formation of carbon deposits. With the 3D scanner is possible to observe these processes and to quantify the resulting deformation. The measurement results can be edited in many different ways to connect them to present them in an accessible form. Moreover, data obtained in digital form, you can quickly send long-distance transport instead of the actual object which is costly and time consuming.
Źródło:: Journal of KONES; 2011, 18, 1; 237-242
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 18.

Tytuł:: The dynamic TDC assigning on the marine four stroke engines indication diagram
Autorzy:: Kowalak, P.
Powiązania:: https://bibliotekanauki.pl/articles/243233.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
marine diesel engines
combustion processes
power estimation
determination of piston's TDC
Opis:: Determination of the internal combustion piston engine 's indicated power is a complex task. A number of difficulties lead to lots of solutions utilized to increase the accuracy of the result. This paper reports on the experiments concerned with a four stroke engine's piston dynamic position determination. Although the paper is mostly concerned with the piston's TDC definition, the experimental methodology can be utilized in the entire piston movement determination. A specially developed measuring assembly and its working principle utilized in the experiment have been presented too. It allows the acquiring of a set of time-position coordinates. Based on the coordinates, the mathematical algorithm for dynamic piston positioning can be developed. As the piston movement was being observed from the crankcase side, the methodology proved to be relatively cheap and easier for installation, compared to proximity sensors installed in the cylinder head. The advantage of optical sensors and light pipes being used was reduction of the explosion risk in oil mist environment inside the crank case.
Źródło:: Journal of KONES; 2007, 14, 2; 259-266
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 19.

Tytuł:: Friction reducing performance of carbon nanotubes covered pistons in internal combustion engines – engine test results
Autorzy:: Kałużny, J.
Merkisz, J.
Kempa, K.
Gapiński, B.
Wróblewski, E.
Stepanenko, A.
Al-Karawi, M.
Powiązania:: https://bibliotekanauki.pl/articles/133001.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: combustion engines
piston
carbon nanotubes
friction
silniki spalinowe
tłok
nanorurki węglowe
tarcie
Opis:: This article discusses the posibility of reducing friction losses in internal combustion engines by using carbon nanotubes, pointing out the large potential of this application. Experimental pistons were made of standard aluminum alloy and coated with a layer of nanotube deposits by spraying them with an aqueous solution containing the binder. The proposed technology of applying layers of nanotubes can be adopted in industrial-scale production. Engine tests were carried out showing a significant reduction of the engine motoring torque, up to 16% for the experimental pistons, thus confirming the favorable tribological properties of nanotubes observed in tribological research and reported by many authors. Supplementary tests were carried out: SEM, EDS, coordinate measuring technique, and x-ray tomography. An alternative technology for hierarchical nanotube multilayer coatings electro-deposition was proposed.
Źródło:: Combustion Engines; 2018, 57, 1; 14-24
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 20.

Tytuł:: Wykorzystanie skanera 3D do analizy uszkodzeń silników spalinowych
Failure analysis of combustion engines elements with scanner 3D
Autorzy:: Karczewski, M.
Koliński, K.
Walentynowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/222206.pdf
Data publikacji:: 2011
Wydawca:: Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:: silniki
skanowanie 3D
uszkodzenia tłoków
combustion engines
3D scanning
piston failure
Opis:: W artykule przedstawiono metodykę analizy uszkodzeń tłokowych silników spalinowych za pomocą skanera 3D umożliwiającego trójwymiarową analizę obiektów przestrzennych. Przedstawiono zasadę działania urządzenia oraz jego możliwości badawcze. Przeanalizowano możliwości metody na przykładzie uszkodzeń eksploatacyjnych tłoków silnika o ZS zasilanego paliwem lekkim. Oceniono dokładność pomiarów uszkodzeń tłoków silnika.
The paper presents a methodology used to analyze damage of piston combustion engines by means of 3D scanner enabling three-dimensional analysis. It shows the principle of the device operation and its investigative potentials. Damage done to pistons in operation of engines burning fuel with low octane number was used to analyze the potentials offered by the method. It assesses the accuracy damage to engine piston measurements.
Źródło:: Zeszyty Naukowe Akademii Marynarki Wojennej; 2011, R. 52 nr 1 (184), 1 (184); 59-66
0860-889X
Pojawia się w:: Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 21.

Tytuł:: Optimization of the combustion chamber strength of aluminum pistons in diesel engines using the DuralBowl technology
Autorzy:: Żurawski, Paweł
Powiązania:: https://bibliotekanauki.pl/articles/24202436.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: diesel engines
DuralBowl
piston
combustion chamber
chamber melting
silnik Diesla
tłok
komora spalania
topnienie komory
Opis:: The article focuses on the problem of loading the combustion chamber of diesel engine pistons together with the method of its optimization using the DuralBowl technology. Along with the growing requirements of exhaust emission standards, the increasing competition in the efficiency of internal combustion engines, the load on the combustion pistons increases due to the increase in pressure and temperature of fuel combustion and the tendency to slim the structure. Numerical analyzes and analyzes of damaged pistons in diesel engines have shown that one of the places most exposed to piston damage are the combustion chambers. There is a concentration of thermomechanical stress at the edge of the combustion chamber, which may lead to the destruction of the piston and the necessity to carry out overhaul of the drive unit. One of the technologies that optimizes the strength of this zone is the DuralBowl local remelting process. This process allows for several timesimprovement in the fatigue strength of pistons in internal combustion engines. The article analyzes the thermomechanical load on the combustion chamber along with the impact of this load on the durability of pistons in diesel engines. An analysis of the DuralBowl process was also performed, aimed at eliminating the negative effects of loading the combustion chamber, extending the piston life. The analysis focused on the microstructure of the material before and after the DuralBowl process.
Źródło:: Combustion Engines; 2023, 62, 1; 91--96
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 22.

Tytuł:: Nanorurki węglowe jako substancja uszlachetniająca prowadząca do poprawy parametrów trybologicznych zespołu tłok-cylinder silnika spalinowego
Carbon nanotubes as ennobling substance leading to the improvement of the tribological movements piston-cylinder of internal combustion engine
Autorzy:: Iskra, A.
Babiak, M.
Wróblewski, E.
Powiązania:: https://bibliotekanauki.pl/articles/317208.pdf
Data publikacji:: 2016
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: silniki spalinowe
zespół tłok-cylinder
trybologia
nanorurki węglowe
internal combustion engines
piston-cylinder
tribology
carbon nanotubes
Opis:: Aktualne tendencje rozwoju silników spalinowych kładą szczególny nacisk na ciągłe zmniejszanie zużycia paliwa i emisji toksycznych składników spalin. Jednym ze sposobów spełnienia tych założeń jest redukcja tarcia w grupie tłok-cylinder. W artykule przedstawione zostały wyniki badań oporów ruchu tłoków pokrytych warstwą nanorurek węglowych oraz dodatku nanorurek węglowych do oleju silnikowego jako substancji uszlachetniającej. Pokrycie powierzchni nośnej tłoków nanorurkami węglowymi wykazały znaczną redukcję strat tarcia w grupie tłokowo-cylindrowej. Doprowadziło to także do redukcji zużycia paliwa. Również przez uszlachetnianie oleju smarującego, obszaru współpracy tłoka z gładzią cylindrową, poprzez tworzenie struktur nanorurek może prowadzić do dalszego obniżenia oporów tarcia.
This article presents the results of motion resistance measurements of an engine equipped with pistons coated with carbon nanotubes and using carbon nanotube additions to the engine’s oil as the active additive. Covering the side surface of the piston with carbon nanotubes results in significant reduction in friction loss of the piston-cylinder system, and reduction in fuel consumption. Supplementing the lubricating oil working in the piston-cylinder liner area with nanotubes could also result in a further reduction of frictional resistance. Nanotubes in the lubricating oil can create structures able to significantly change oil properties, however, suspension creation processes are radically different.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 6; 905-908
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 23.

Tytuł:: Modyfikacja układu do pomiaru przebiegu ciśnienia spalania okrętowego silnika tłokowego Sulzer AL25/30
Modification of the System for Measuring Combustion Pressure in the Ship Piston Engine Sulzer AL25/30
Autorzy:: Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/342392.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Morski w Gdyni. Wydawnictwo Uniwersytetu Morskiego w Gdyni
Tematy:: indykowanie
wykresy indykatorowe
średnie ciśnienie indykowane
maksymalne ciśnienie spalania
ciśnienie cylindrowe
diagnostyka
okrętowe silniki tłokowe
indication
indicator diagrams
average indicated pressure
maximum combustion pressure
cylinder pressure
diagnostics
marine piston engines
Opis:: Artykuł przedstawia wybrane problemy analizy przebiegów ciśnień cylindrowych w okrętowych silnikach tłokowych. Prawidłowo sporządzony i przeanalizowany wykres indykatorowy pomaga w formułowaniu wniosków diagnostycznych, za pomocą których można doprowadzić do optymalnej, pod kątem ekonomicznym i ekologicznym, regulacji silnika okrętowego. Pomiary ciśnień cylindrowych zaliczane są do trudnych, a także obarczonych wieloma błędami, dlatego też głównym tematem artykułu jest przedstawienie nowej koncepcji pomiarów przebiegów ciśnień cylindrowych.
The article presents selected problems regarding the correct analysis of cylinder pressures in ship piston engines. Correctly prepared and the analyzed indicator diagram helps in formulating appropriate diagnostic conclusions, with the help of which it is possible to achieve the optimal, in economic and environmental terms, regulation of the ship's engine. Cylinder pressure measurements are classified as difficult and also burdened with many errors. Therefore, the main topic of the article is to present a new concept for cylinder pressure measurements.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Gdyni; 2018, 108; 168-180
1644-1818
2451-2486
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Gdyni
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "piston combustion engines" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język