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    Tytuł:
    Simulation of injection and combustion processes in 4-stroke spark ignition engine with CNG direct injection
    Autorzy:
    Sendyka, B.
    Mitianiec, W.
    Noga, M.
    Wachulec, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/246095.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    injection process
    combustion process
    simulation
    modelling
    alternative fuels
    CNG
    Opis:
    The paper presents results of simulation conducted as afirst step of 4-stroke spark ignition experimental engine testing. The simulations were performed in a KIVA-3Vsoftware, which is intended to carry out a 3-D simulations of engine's processes. The source code of the software has been modified in order to apply it for gas injection. Original version of the software has been designedto simulate liquid fuel injection only. The simulation of direct CNG injection and combustion has been done for stratified and homogenous modes in order to check the assumed injection, ignition and charging parameters. Important assumption is that the injector had only one nozzle with flow area equal to 2 mm2. Two different cases of fuel direct injection for stratified charge have been analysed. In the first case fuel jet was almost vertical. In the other one fuel jet was nearly horizontal. Further testing has been performed using one-cylinder motorcycle 4-stroke SUZUKI DR-Z400S engine adapted to CNG fuelling. Such an engine has a suitable high compression ratio for CNG fuelling. The simulation has confirmed assumed parameters and has shown that one nozzle injector doesn't provide required fuel stream dissipation and piston crown modification is needed to direct fuel stream in spark plug area. However doing simulation requires some effort this example has shown than this is very important step before conducting experimental tests which provides crucial information and helps to avoid expensive mistakes which can be made during experimental engine preparation.
    Źródło:
    Journal of KONES; 2010, 17, 1; 373-378
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical method of registration of process of the injection and the burning in the chamber of the cylinder of the engine GDI
    Autorzy:
    Sendyka, B.
    Noga, M.
    Cygnar, M.
    Budzik, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/244831.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engines
    injection process
    combustion chambers
    optical method
    Opis:
    In this article method of a visualization of a process of injection and burning of the air-fuel mixture was presented in cylinder of engine GDI. Intention of the visualization is a possibility of a determining and a selection how the most profitable parameters of injection for the work of engine during burning of the various load. Apparatus of the firm AVL - VideoScope 513 D was used to performance of positional tests, having on purpose registration of a dislocation of the stream of the fuel from the moment of injection, one by one a reflection of fuel from of the bottom of the piston until for the connection under the spark plug, and next an expansion of the flame from moment of the ignition until to the end of process of burning. Results of carried out visualization are in form files of the type of avi. These files are intended to a presentation of a record of respective frames as a moving image. From editorial reasons in this article, results of visualization are presented in a form of single cinematographic frames following in turn after themselves what the certain degree of the angle of the rotation of the crankshaft. Values of angles for which next frames were presented are placed in a bottom left corner of a single frame. All executed registrations archive images in the function of angle of rotation of crankshaft no from one, but from many of the cycles of the work of engine
    Źródło:
    Journal of KONES; 2008, 15, 4; 495-500
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the Impact of Injection Moulding Process Parameters on the Properties of Mouldings Made of Low-Density Poly(ethylene) Recyclate LDPE
    Autorzy:
    Kalwik, Aleksandra
    Humienny, Roman
    Mordal, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/2134091.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    polyethylene
    injection moulding
    injection moulding process parameters
    Opis:
    The parameters of the injection moulding process have a significant influence on the properties of the moulded parts. Selection of appropriate injection conditions (e. g. the injection temperature, mould temperature, injection and holding pressure, injection speed) contributes to the productivity and energy consumption of the injection moulding process as well as to the quality of the moulded parts. The aim of this study was to evaluate the influence of injection moulding parameters on properties of poly(ethylene) mouldings. Regranulate obtained from recycled film, which is a mixture of low-density poly(ethylene) and linear low-density poly(ethylene), was used for testing. Samples in the form of standardised tensile bars of type A1 were produced by injection moulding. A Krauss-Maffei KM65-160C4 injection moulding machine was used for this purpose. Variable parameters of the this process used in the study were: injection speed, mould temperature and holding pressure. The results of tensile strength tests of the obtained samples are presented. The weight and dimensions of mouldings from four different regranulates were also investigated. The effect of injection moulding conditions on the properties of poly(ethylene) mouldings was shown in the investigations. The mass of poly(ethylene) mouldings is dependent on the holding pressure.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 3; 1043--1049
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determining the gas-water contact moving boundary in underground gas storage operation
    Autorzy:
    Pyanylo, J.
    Vabrychuk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1938602.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska
    Tematy:
    gas injection process modelling
    withdrawal
    porous media
    gas replacing
    gas-water contact
    GWC
    hydraulic integration
    Opis:
    We considered the characteristics of key technological objects involved in gas storage. Mathematical models of groups of hydraulically related objects (system mathematical models) are constructed and described. Problems are set and examples of application of analytical and numerical methods for their solution are provided
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2016, 20, 1; 33-41
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effectiveness of cellular injection molding process
    Autorzy:
    Garbacz, T.
    Dulebova, L.
    Krasinskyi, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/103059.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    thermoplastics polymers
    cellular injection molding process
    blowing agents
    physical properties
    Opis:
    In a study of cellular injection, molding process uses polyvinylchloride PVC. Polymers modified with introducing blowing agents into them in the Laboratory of the Department of Technologies and Materiase of Technical University of Kosice. For technological reasons, blowing agents have a form of granules. In the experiment, the content of the blowing agent (0–2,0% by mass) fed into the processed polymer was adopted as a variable factor. In the studies presented in the article, the chemical blowing agents occurring in the granulated form with a diameter of 1.2 to 1.4 mm were used. The view of the technological line for cellular injection molding and injection mold cavity with injection moldings are shown in figure 1. The results of the determination of selected properties of injection molded parts for various polymeric materials, obtained with different content of blowing agents, are shown in Figures 4–7. Microscopic examination of cross-sectional structure of the moldings were obtained using the author’s position image analysis of porous structure. Based on analysis of photographs taken (Figures 7–9) it was found that the coating containing 1.0% of blowing agents is a clearly visible solid outer layer and uniform distribution of pores and their sizes are similar.
    Źródło:
    Advances in Science and Technology. Research Journal; 2013, 7, 18; 74-80
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface Integrity Evaluation on Aluminium-Epoxy Composite in Machining using Taguchi Method
    Autorzy:
    Leong, Kean Wei
    Shayful, Zamree Abd Rahim
    Fathullah, M.
    Omar, Mohd Firdaus
    Mohd Mustafa Al Bakri, Abdullah
    Radhwan, Husin
    Mazlan, Amirul Haziq
    Jeż, Bartłomiej
    Nabiałek, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/2048837.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hybrid mold
    metal epoxy composite
    MEC
    machining
    injection molding process
    Opis:
    The increasing needs of using aluminum epoxy composite as a replacement to solid metal rapid prototyping has opened to interests in optimizing its machining processes. This paper reported on the success of optimizing the surface roughness of aluminium epoxy composite using milling process along with a new finding on the best combination parameters. Taguchi method was used as the optimization method whereas spindle speed, feed rate, and depth of cut were set as input factors using an L9 Orthogonal Array. Analysis of Variance was used to identify the significant factors influencing the surface roughness. Experiment was conducted in dry condition using a vertical milling machine and the surface roughness after the machining was evaluated. Optimum combination of cutting parameters was identified after the finest surface roughness (response) based on the signal-to-noise ratio calculated. Cutting parameters selected after preliminary testing are cutting speeds of (2000, 3000 and 4000) rpm, feed rate (300, 400 and 500) mm/min, and cutting depth (0.15, 0.20, and 0.25) mm. The result showed that cutting speed had the largest percentage contribution to surface roughness with 69% and the second highest contribution was feed rate with 22% and depth of cut at 9%. The spindle speed was found as the most significant factor influencing the quality of surface roughness. The result is significant particularly in providing important guidelines for industries in selecting the right combination of parameters as well as to be cautious with the most significant factor affecting the milling process of metal epoxy composite.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 1; 233-239
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of acoustic emission in research of phenomenon occurring in high pressure fuel oil pipes of marine diesel engines
    Zastosowanie emisji akustycznej w badaniach zjawisk zachodzących w przewodzie wtryskowym paliwa okrętowego silnika spalinowego
    Autorzy:
    Bejger, A.
    Drzewieniecki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/258354.pdf
    Data publikacji:
    2007
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
    Tematy:
    sygnał emisji akustycznej
    diagnoza
    silnik okrętowy
    system wtryskowy
    proces wtrysku
    acoustic emission signal
    diagnosis
    marine diesel engine
    injection system
    injection process
    Opis:
    This article presents the possibilities of AE signal application in the diagnosis of the technical condition of marine diesel engines, while taking into consideration injection systems in the range of the evaluation of the repeatability of fuel injection pressure. It describes the phenomenon and characterized disturbances in the injection pipe and their influence on the AE signal changes. On the basis of results of the research, the analysis of the AE signal presenting the coarse of fuel pressure changes in the injection pipe and pump was done, and there were distinguished friction processes occurring in the precise pair of injection pump and field characterizing the flow out of fuel from injector.
    W niniejszym artykule przedstawiono możliwości zastosowania sygnałów emisji akustycznej do diagnozowania stanu technicznego okrętowych silników spalinowych, ze szczególnym uwzględnieniem układów wtryskowych w zakresie oceny powtarzalności ciśnienia wtrysku paliwa. Omówione zostały zjawiska i scharakteryzowano zakłócenia zachodzące w przewodzie wtryskowym i ich wpływ na zmiany sygnału EA. W oparciu o wyniki badań dokonano analizy sygnału EA przedstawiającego przebieg zmian ciśnienia paliwa w przewodzie i pompie wtryskowej oraz wyróżniono procesy tarciowe zachodzące w parze precyzyjnej pompy wtryskowej i obszar charakteryzujący wypływ paliwa z wtryskiwacza.
    Źródło:
    Problemy Eksploatacji; 2007, 3; 25-31
    1232-9312
    Pojawia się w:
    Problemy Eksploatacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flow simulation of the two-component plastic injection process with reinforced parts
    Autorzy:
    Mîndru, T.
    Ciofu, C.
    Nedelcu, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/408933.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Śląska
    Tematy:
    proces wtrysku
    tworzywo sztuczne
    wzmocnienie metaliczne
    symulacja komputerowa
    Cosmos
    injection process
    plastics
    metallic reinforcement
    computer simulation
    cosmos
    Opis:
    This paper presents a simulation of two-component injection process for obtaining plastic parts with metallic reinforcement using a specific software package, MoldFlow. It will consider the following process parameters, mould temperature and injection pressure. The study will analyze the comparison between plastic parts with and without metallic reinforcement. It will highlight the differences that occur between the input parameters, mould temperature and injection pressure and the out parameters, cooling time and injection time for those types of parts obtained. Furthermore will be simulated a mechanical stresses of traction using a specific software package, Cosmos, for both parts obtained.
    Źródło:
    Wybrane Problemy Inżynierskie; 2011, 2; 261-266
    2083-1021
    Pojawia się w:
    Wybrane Problemy Inżynierskie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer-aided diagnostics of injection and combustion processes in engines equipped with Common Rail fuel injection
    Autorzy:
    Lotko, Wincenty
    Powiązania:
    https://bibliotekanauki.pl/articles/2146748.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    Diesel engine
    alternative fuels
    quick-changing parameters
    injection process
    combustion process
    uniqueness of injection
    uniqueness of combustion process
    diagnostic process
    silnik Diesla
    paliwa alternatywne
    proces wtrysku
    proces spalania
    niepowtarzalność procesu spalania
    diagnostyka
    Opis:
    In earlier designs, the compression-ignition engine units were controlled by means of mechanical elements. They were levers, rods, springs, pawls, cams and others. The quality of such control did not ensure the required repeatability of control parameters in the fuel injection and combustion process. After the introduction of the standards limiting engine emissions of the limited exhaust components, the aforementioned engine control systems were not able to meet the requirements. The mechanical regulation of mechanical systems has been replaced by electronic control systems. It was the development of computer techniques and software that enabled design solutions of control systems for injection and combustion process parameters in engines with sufficient accuracy and repeatability of test results. The modern EDC (Electronic Diesel Control) control system, due to the computing power of microprocessors increased in recent years, enables meeting high requirements of modern Common Rail injection systems. The article presents issues in the area of four thematic levels: the design and modernization of the engine, its operation, diagnostic problems in order to determine reasons of unit failures and bench-top methods for assessing the effectiveness of unit repairs as well as issues concerning alternative fuels.
    Źródło:
    Diagnostyka; 2022, 23, 4; art. no. 2022407
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Self-Ignition Delay and Control Parameters of Diesel Engines for Different Vehicle Feeding Systems and Different Fuels
    Autorzy:
    Lotko, Wincenty
    Powiązania:
    https://bibliotekanauki.pl/articles/2024151.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    self-ignition delay
    combustion process
    fuel injection process
    diesel engine
    renewable fuels
    opóźnienie samozapłonu
    proces spalania
    proces wtrysku paliwa
    silnik wysokoprężny
    paliwa odnawialne
    Opis:
    The phenomena accompanying the self-ignition period have been the subject of extensive research in this area. They are usually carried out in constant volume pressure chambers or in reactors with constant air flow. Such tests are considered to be basic. The conditions in these tests are definitely different from those in compression ignition engines. Therefore, the comparison of the auto-ignition delay periods from test setups to those obtained from real engines raises a number of doubts. Because the self-ignition delay period determines the combustion process, a theoretical analysis was conducted, pertaining to a number of factors that have an impact on this process which determines the operational aspects of the engine, and thus its economics and ecology. The research object was a single-cylinder engine from AVL LIST GmbH in Graz, Austria. The engine is equipped with a Common Rail injection system. The test setup meets the following standards: Directive 1999/96/EC of the European Parliament and the Council of 13th December 1999, Regulation (EC) No 715/2007 of the European Parliament and the Council of 20th June 2007, as well as Commission Regulation (EC) No 692 /2008 of 18th July 2008. The analysis of the operational aspects of the self-ignition delay period was based on the results of tests on the AVL 5402 engine fueled with hydrocarbon fuels: diesel and synthetic oil. The engine was also fed with vegetable fuel – rapeseed oil. The obtained material from the tests warns the user of CI engines against the effects of their failure if the engine control parameters and the quality of fuel for its supply are not maintained as recommended by the manufacturers. The material contained in the publication is used for scientific analysis, and, which is worth emphasizing, is of a utilitarian nature.
    Źródło:
    Advances in Science and Technology. Research Journal; 2021, 15, 1; 245-254
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of IR thermography to show the mold and part temperature evolution in injection molding
    Autorzy:
    Bula, K.
    Różański, L.
    Marciniak-Podsadna, L.
    Wróbel, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/94156.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    IR thermography
    injection molding process
    polypropylene
    termografia w podczerwieni (IR)
    formowanie wtryskowe
    polipropylen
    Opis:
    This study concerns the application of infrared camera for injection molding analysis by measuring temperatures of both injection molded parts and injection mold cavities in a function of injection cycles. The mold with two cavities, differing in thickness (1 and 3 mm), and a cold direct runner was used. Isotactic polypropylene homopolymer was utilized to produce parts. Mold temperature was set at 22OC and controlled by a water chiller. Five measuring points were determined: SP1, SP2 (placed in the 3 mm cavity), SP3, SP4 (located in the 1 mm cavity) and SP5 around an injection molding gate. Our investigations showed that the highest temperature is localized around SP2 point and the lowest at SP4. Also, it was proved that even after 62 injection molding cycles, temperatures of cavities were not stable, revealing their further increase with each cycle.
    Źródło:
    Archives of Mechanical Technology and Materials; 2016, 36; 40-43
    2450-9469
    Pojawia się w:
    Archives of Mechanical Technology and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of diesel fuel mixture and camelina oil ester on the process of fuel injection in traction engine
    Autorzy:
    Orliński, S.
    Orliński, P.
    Wojs, M. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/246900.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    fuel plant
    process of injection
    engine test bench diesel engine
    Opis:
    This paper presents the results of comparative research on basic physical and chemical properties of pure diesel fuel and two types’ mixtures of Camelina oil ester (Camelina oil ester content of the mixture was 10% and 15%) and diesel fuel. Application of these mixtures has different physicochemical properties to power supply diesel engine, made it possible to detect existing differences in the injection process (pumping and spraying). The analysis of the injection process has been defined through experimental graphs of the fuel pressure in injection line and registered height of the needle injector. With the knowledge of these two fast-changing engine parameters and loadvelocity conditions, there were calculated: fuel flow speed from nozzle, range and fuel spray disintegration time and the average critical diameter of the droplets. In the final part of the article it was shown, that the fuel with different physicochemical properties has a significant impact on the injection process. There were also made a comparative assessment of the suitability test compounds for use in service.
    Źródło:
    Journal of KONES; 2013, 20, 1; 255-261
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of marine combustion engine processes with vibroacoustic methods for environment protection strategy
    Analiza procesów zachodzących w spalinowych silnikach okrętowych za pomocą metod wibroakustycznych dla strategii ochrony środowiska naturalnego
    Autorzy:
    Merkisz, J.
    Waligórski, M.
    Babiak, M.
    Kniaziewicz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/133591.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    vibroacoustic diagnostics
    injection process
    combustion process
    HD-D marine engine
    digital signal analysis
    emission assessment
    emission control
    diagnostyka wibroakustyczna
    proces wtrysku
    spalanie paliwa
    okrętowy silnik typu HD-D
    analiza cyfrowa sygnału
    ocena emisji
    kontrola emisji
    Opis:
    The paper describes the method of a sea boats online diagnostic with the use of the main and accompanying processes analyses. The paper concerns injection and combustion processes taking place in internal combustion engines of the military boats. Authors chosen vibroacoustic processes in the research to obtain the important diagnostic information on the above processes runs and their correctness in the sources of a drive of the HDV off-road water transport vehicles. The specified method of a digital data acquisition for dynamic processes in such combustion engines and sort of diagnostic parameters taken into account were basis of the required empirical research process and further signal analyses. High accuracy of the measurement methodology and process with additional conditions caused the authors could take the obtained signals to the parallel, combustion engineering and vibroacoustic engineering process, according to which they extract important information on the combustion processes runs and their problems. Identification of such problems and its type was helpful to build algorithm of the diagnostic assessment of such processes in the point of view of building diagnostic system for such military boats with the regime of the efficiency of the energy changes and emission control in the all exploitation period.
    W artykule przedstawiono metodę ciągłej diagnostyki jednostek pływających z zastosowaniem analiz procesów głównych i towarzyszących. Praca dotyczy procesów wtrysku i spalania paliwa w silniku spalinowym rozważanych dla jednostek pływających. W ramach pracy badawczej wykorzystano procesy wibroakustyczne, celem uzyskania istotnych diagnostycznie informacji o poprawności przebiegu tychże procesów w napędach środków transportu wodnego kwalifikowanych do grupy HDV o zastosowaniach pozadrogowych. Podstawą wymaganego procesu badań empirycznych i następujących po nim analiz sygnałów była zastosowana ściśle określona dla procesów dynamicznych metoda cyfrowej akwizycji danych oraz rodzaj uwzględnionych w analizie parametrów diagnostycznych. Duża dokładność metodyki pomiarowej i procesu wraz z uwzględnieniem warunków uzupełniających umożliwiły dokonanie oceny uzyskanych sygnałów w ramach analizy inżynierskiej procesu spalania i oceny wibroakustycznej, zgodnie z którymi wybrano ważne informacje o przebiegu procesów spalania i nieprawidłowościach w nich występujących. Identyfikacja tychże nieprawidłowości i wskazanie ich rodzaju stanowiło bazę do opracowania algorytmu oceny diagnostycznej powyższych procesów, z punktu widzenia budowy systemu diagnostycznego dla zastosowań okrętowych przy uwzględnieniu zmian sprawności energetycznej w obiekcie i kontroli emisji w całym okresie eksploatacji obiektu technicznego.
    Źródło:
    Combustion Engines; 2013, 52, 2; 28-39
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fault Sensitivity of Explicit DMC and GPC Algorithms
    Autorzy:
    Gawkowski, P.
    Ławryńczuk, M.
    Marusak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/384867.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    dependability
    fault injection
    process control
    predictive control
    Opis:
    This paper studies dependability of software implementation of DMC (Dynamic Matrix Control) and GPC (Generalised Predictive Control) Model Predictive Control (MPC) algorithms. Explicit formulation of algorithms is considered in which the control laws are calculated off-line. Dependability is evaluated using software implemented fault injection approach. Tests are performed in the control system of a remotely controlled robot vehicle used in nuclear plants.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 1; 52-56
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some aspects of dual fueling of the middle class modern CI engines
    Autorzy:
    Stelmasiak, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/242729.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    dual fuel
    natural gas
    gas injection
    common rail
    combustion process
    Opis:
    The paper presents results of studies on the dual fuel engine equipped with the Common Rail high pressure injection system and low pressure natural gas injection into the inlet collector. Impact of some regulation parameters of the feed system on the engine performance parameters was examined. Research of the pilot dose selection showed that the minimal size of the dose was limited to ca 12+13% of the nominal dose. It is a result of some troubles of the electromagnetic injector operation at short times of control. The effect of that is a notable deterioration of smoothness of the engine operation. However, electronic control of the injector opening timing enables to reduce the pilot dose size as the engine load is reduced. The research showed advantageous impact of the decreasing dose on the engine efficiency and exhaust gas toxicity at partial loads of the engine. The tests reconfirmed full usefulness of the system to combustion process optimization. A delay of the injection start at high engine loads enables to reduce nearly twice the NOx concentration in exhaust gas with insignificant decreasing, some 1+1.5%, of its efficiency. The used systems showed their high suitability to control charge quality in dual fuel engines, in traction applications in particular.
    Źródło:
    Journal of KONES; 2007, 14, 4; 453-462
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computational modelling of the fuel injection and combustion in a Diesel K6 rotary engine
    Autorzy:
    Mason, M.
    Wyszyński, M. L.
    Jordan, O.
    Gibson, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/243793.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    combustion process
    combustion factors
    fuel injection
    ANSYS Fluent code
    Opis:
    This paper outlines the methods and results of computations completed using the ANSYS Fluent code modelling the fuel injection and combustion within the K6 engine, a new form of rotary engine in which the fuel is injected in an arc across the top of the cylinder. The model uses the DPM Model in conjunction with a dynamic mesh and non-premixed combustion models to treat the injection as liquid diesel evaporating to C12H23. The outcomes of this model are presented in images displaying the distribution of temperature, and fuel and CO2 concentrations. The limitations pertaining to the maximum injection angles are also studied. The simulation is found to be effective and the results suggestive of successful, clean and complete combustion while presenting some matters, which require further investigation. The article presents temperature within the combustion chamber at various crank angle degrees, ) velocity of fluid within the combustion chamber, effects of impingement with injector offset on temperature and fuel concentration, fuel concentration demonstrating impingement, in cylinder temperature curve.
    Źródło:
    Journal of KONES; 2018, 25, 4; 263-276
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of mold design and injection parameters on warpage deformation of thin-walled plastic parts
    Wpływ konstrukcji formy i parametrów procesu wtryskiwania na odkształcenia cienkościennych elementów z tworzyw polimerowych
    Autorzy:
    Wang, Bo
    Cai, Anjiang
    Powiązania:
    https://bibliotekanauki.pl/articles/1789993.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    injection molding
    warpage deformation
    mold design
    process parameters
    wtryskiwanie
    odkształcenie
    konstrukcja formy
    parametry procesu
    Opis:
    Thin-walled plastic parts are susceptible to deformation during injection molding. Using the example of a notebook battery cover, optimization of the injection mold design and injection process parameters was performed with Moldflow software, which resulted in about 69% reduction of the deformations. Moreover, the uneven material shrinkage during the injection process has been shown to be the main cause of deformations of thin-walled plastic parts.
    Cienkościenne elementy z tworzyw polimerowych są podatne na odkształcenia podczas formowania metodą wtryskiwania. Na przykładzie pokrywy baterii notebooka dokonano optymalizacji konstrukcji formy wtryskowej oraz parametrów procesu wtrysku w programie Moldflow, co pozwoliło na zmniejszenie odkształceń o około 69%. Ponadto wykazano, że nierównomierny skurcz materiału podczas procesu wtryskiwania jest główną przyczyną deformacji cienkościennych elementów z tworzyw polimerowych.
    Źródło:
    Polimery; 2021, 66, 5; 283--292
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of process stability in injection molding based on product weight
    Autorzy:
    Chaciński, Tomasz
    Jaskólski, Piotr
    Pałubicki, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/2106429.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    injection molding
    quality control
    statistical process control
    process capability indicators
    wtryskiwanie
    kontrola jakości
    statystyczne sterowanie procesem
    wskaźnik zdolności procesowej
    Opis:
    This paper describes a stability study of a plastic injection molding process. There is a need - underpinned by economic considerations - to continuously improve and lead to a maximum reduction in the level of deficiencies in production processes. One of the methods that can help to improve the process is SPC (Statistical Process Control). One of the SPC tools are proces capability indicators (Cp, Cpk) or performance indicators, such as Pp, Ppk. In this paper, on a mass measuring station, a study was conducted on three types of products manufactured in a company, and the measurements concerned each piece of the product manufactured during one work shift. The data collected were used to calculate the process capability and to evaluate these processes.
    Źródło:
    Journal of Mechanical and Energy Engineering; 2022, 6, 1; 21--26
    2544-0780
    2544-1671
    Pojawia się w:
    Journal of Mechanical and Energy Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diesel operation efficiency improvement based on modelling of fuel carburetion process
    Povyshenie ehffektivnosti raboty dizelja na osnovanii modelirovanija processa smeseobrazovanija topliva
    Autorzy:
    Berestovoy, I.
    Aynagoz, G.
    Berestovoy, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/792242.pdf
    Data publikacji:
    2013
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    diesel engine
    structure
    fuel injection system
    drop
    fuel carburetion process
    kinetic energy
    combustion process
    air-fuel mixture
    engine operation
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2013, 13, 3
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation model of combustion engine with direct injection of hydrogen
    Autorzy:
    Blažek, J.
    Brabec, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/242159.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    Simulation model of combustion engine
    direct hydrogen injection
    Ricardo Wave
    combustion process
    spark ignition engine
    Opis:
    Fuel mixture formation inside a cylinder has become used more frequently in spark ignition engines in recent years. gas internal combustion engines can also benefit from this concept as direct injection into an engine 's cylinder during the compression stroke not only increases its volumetric efficiency but also eliminates adverse anomalies in the combustion process. This paper focuses on the development of a simulation model for a spark ignition engine with direct hydrogen injection into a cylinder. The Wave software was used for the simulation. A part of the paper depicts the model's verification. The study utilized a three-cylinder internal combustion engine with the total cylinder volume of 1.2 dm3. The concept of the engine is based on new, high-pressure injectors with 10 MPa inlet pressure (gas-hydrogen injection directly into the engine cylinder). Utilization of internal fuel mixture formation can be beneficial due to its enabling the control of the combustion process and gaseous emission generation. From the viewpoint of the engine's design, however, internal fuel mixture utilisation is more complicated as injectors have to be built into the cylinder head. The actual engine construction is housed in laboratories of the Technical University of Liberec, Department of Vehicles and Engines.
    Źródło:
    Journal of KONES; 2009, 16, 3; 15-21
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fuel feed to diesel at a start regime
    Autorzy:
    Fedyanov, E.
    Slavuckiy, V.
    Kanygin, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/246126.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    starting duty
    features of process of giving
    nozzle valve lifting
    injection pressure
    transients
    cyclic fuel delivery
    Opis:
    Some factors defining starting properties of diesel engines are considered. Features of process of fuel feed on a starting mode are analyzed. Basic possibility of steering by processes of mixture forming and combustion is proved at a small speed of a crankshaft. Developed a design procedure of process of fuel feed in a diesel engine at a start regime. On the basis of the theory of transients in a fuel system, the reasons of deterioration of indicators of fuel feed process are explained at a start regime of diesel engine. Possibilities of a method of increase of initial pressure in a delivery highway by prostrating scrolling of a crankshaft with idle spray jets are investigated. The method of intensification of fuel feed process patented by authors used in diesel engine at a start regime. The results of numerical experiments confirming improvement of indicators of process of injection at high-speed speeding up of the pump of a high pressure are resulted: Increase maximum and an average pressure, cutting-down of duration of fuel feed process. The paper concentrates on possibility of improving fuel fed process at the starting regime by means of high speed forcing the fuel pump and the initial pressure rising by an earlier camshaft rotation with out of work injectors.
    Źródło:
    Journal of KONES; 2009, 16, 1; 111-116
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An integrated approach to development and simulation manufacturing processes of optical products
    Autorzy:
    Yablochnikov, E. I.
    Vasilkov, S. D.
    Andreev, Y. S.
    Pirogov, A. V.
    Tretyakov, S. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/406888.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    optical products
    polymer lens
    simulation
    CAD/CAM/CAE
    technological process
    injection molding
    additive technologies
    cyber-physical systems
    Opis:
    The engineering management process and automation method for making pilot set of optical polymer parts used in LED systems are considered. Optical system and lens geometry development are realized in Zemax. 3D model and molding tools with further generating of NC coded data are developed in Cimatron E. Pre simulation of injection molding process is realized in Moldex3D and thermo-mechanical analysis is provided by OOFELIE. 3D printer Objet is used for parts prototyping on different stages of the process. Data and process management are realized with a help of PDM system SmarTeam.
    Źródło:
    Management and Production Engineering Review; 2015, 6, 4; 94-103
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On-line temperature recording in a multi cooling channel injection molding tool
    Monitorowanie temperatury w procesie wtryskiwania tworzywa do formy z wieloma kanałami chłodzącymi
    Autorzy:
    Postawa, P.
    Stachowiak, T.
    Grzesiczak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/945847.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    thermoplastic polymer
    injection molding
    process control
    mold temperature
    infrared camera
    polimer termoplastyczny
    formowanie wtryskowe
    sterowanie procesem
    temperatura formy
    kamera termowizyjna
    Opis:
    In this paper the temperature distribution in injection mold was investigated. For this purpose a special experimental mold was designed and made. This mold has eight independent cooling circuits which were connected to a temperature controller using two rotameters. In order to register temperature changes, four thermocouples placed in various points of the mold under the cavity surface and connected to a recorder. It allowed to transmit the data in real time during the injection process and to determine the temperature profile in various areas of injection molding. The infrared thermal images and temperature distribution profiles of the mold cavity and molded parts were also determined.
    Zbadano rozkład temperatury w formie wtryskowej oraz zaprojektowano i wykonano eksperymentalną formę wtryskową wyposażoną w osiem niezależnych obiegów chłodzących, podłączonych do termostatu za pośrednictwem dwóch rotametrów. W celu rejestracji zmian temperatury w różnych punktach formy tuż pod powierzchnią gniazda umieszczono cztery termopary połączone z rejestratorem, które umożliwiały przesyłanie danych, w czasie rzeczywistym, podczas trwania procesu i wyznaczenie profilu temperatury w różnych obszarach formy wtryskowej. Sporządzono też termogramy w podczerwieni i profile rozkładu temperatury gniazda formy oraz wypraski.
    Źródło:
    Polimery; 2015, 60, 5; 351-355
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the gas recycling duration on the hydrocarbon recovery from gas condensate fields
    Autorzy:
    Matkivskyi, S.V.
    Burachok, V.
    Matiishyn, L.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200594.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    gas condensate reservoir
    condensation of heavy hydrocarbons
    hydrocarbon recovery enhancement technologies
    cycling process
    dry gas injection period
    zbiornik kondensatu gazu
    kondensacja ciężkich węglowodorów
    technologie zwiększania wydobycia węglowodorów
    proces cykliczny
    okres wtrysku suchego gazu
    Opis:
    Purpose: Optimization of formation pressure maintenance technologies in the development of gas condensate fields with a high initial content of condensate in the reservoir gas using numerical modelling. Design/methodology/approach: A study on the efficiency of dry gas injection for pressure maintenance in gas condensate fields was performed with the help of numerical 3D models. Key technological indicators of the reservoir development were calculated for the dry gas injection period of 12, 24, 36, 48, and 60 months. The results are presented as plots for the parameters in a study. Findings: Based on the results of the studies, it was found that the introduction of dry gas injection technology ensures that reservoir pressure is maintained at the highest level compared to the development of gas condensate reservoirs on primary depletion. Due to this, further condensate drop-out in the reservoir is slowed down, and the production of partly already condensed hydrocarbons is ensured by their evaporation into the dry gas injected from the surface. The simulation results indicate that increase in the injection duration period leads to an increase of the cumulative condensate production and hence the final hydrocarbon recovery factor. Research limitations/implications: The heterogeneity of oil and gas deposits, both in terms of area and thickness, significantly affects the efficiency of the developed hydrocarbon enhancement technologies. In order to minimize the negative impact of heterogeneity, it is necessary to conduct additional studies on the conditions of specific reservoirs or fields. Practical implications: The reservoir pressure maintenance technology implementation according to various technological schemes, as well as using various types of injection agents, will significantly intensify the development of depleted gas condensate fields with a high condensate yield. Originality/value: Statistical analysis of the simulation results identified the optimum value of the dry gas injection period into the gas condensate reservoir, which is 34.3 months for the conditions of a given reservoir in the study.
    Źródło:
    Archives of Materials Science and Engineering; 2022, 117, 2; 57--69
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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