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EN
The subject of this article is to compare the effectiveness of commercial exhaust gas aftertreatment systems such as TWC and GPF with their prototype variant, which is produced on a pilot line that allows the recovery of precious metals. What's more, the said production line allows the manufacture of components compliant with Euro IV, V and VI standards. Depending on the model of the monolith made, it is possible to reduce the consumption of precious metal raw materials by up to 20%, which should be considered a significant result. The article describes in detail the manufacturing process of metal carriers using the mentioned technology. A dynamic engine dynamometer was used for tests verifying the effectiveness of particulate filters, on which the RDE test route covering the area of the Poznan agglomeration was mapped. The tests performed are particularly important, as it should be borne in mind that according to the forecast in 2025, internal combustion engines powered by conventional fuels will account for 85% of all propulsion sources. In addition, the increasing environmental awareness of vehicle users and manufacturers requires solutions to reduce PM emissions into the atmosphere in both mass and number.
PL
Wodór jest najlżejszym i najbardziej rozpowszechnionym pierwiastkiem we wszechświecie. Szacuje się, że 92,7% atomów występujących w poznanym wszechświecie to wodór, hel stanowi 7,2%, a reszta pierwiastków ma udział na poziomie jedynie 0,1%.
3
Content available Measurement of rail vehicles exhaust emissions
EN
The basic problem in terms of measuring exhaust emissions is the approval tests of traction vehicles, which are carried out on engine dynamometers. Therefore, it is impossible to obtain reliable results concerning their actual impact on the natural environment. It is therefore advisable to carry out the tests in real operation conditions, as is the case for road vehicles for which RDE (Real Driving Emissions) tests are carried out. The latest Stage V emission standards push for the introduction of this type of test, but no limit values for toxic exhaust gases have been established and no test guidelines have been defined for assessing actual emissions. This article describes the issues related to the legislative guidelines for non-road vehicles in force in Europe, as well as the measurement tools used, such as mobile equipment for measuring emissions of PEMS (Portable Emissions Measurement Systems) and newly developed emission gates. Additionally, the paper presents examples of locomotive exhaust emission tests in real operating conditions. The aim of the measurements was to assess the emission of toxic compounds against the relevant standards. The subject of the research was a diesel locomotive type T448.P equipped with a modernized internal combustion engine.
EN
The share of road transport accounts for more than 85% of the total structure of freight transportation. In this process, mainly motor vehicles are used to carry out the freight work. In addition to them, forklifts are also used, whose task is to load and unload goods. These vehicles are categorized as NRMM (Non-Road Mobile Machinery). Forklift trucks have internal combustion or electric drive. The paper presents an analysis of the emission of pollutants and fuel consumption from forklift trucks equipped with diesel and LPG power. The study uses the author's test taking into account the raising/lowering of a pallet, a loaded and unloaded run. The measurements were made in the warehouse and outside the warehouse using the Portable Emission Measurement System (PEMS) equipment. The aim was to show the influence of loading conditions on the emission of pollutants and fuel consumption.
EN
The article presents emission test results comparison carried out on a dynamic engine dynamometer. Parameters were recorded during a drive made in accordance with the requirements of the RDE. Test bench allowed to determine the particle mass and number emission in the repetitive engine operation conditions. One of three used elements wan an OEM solution from one of particulate filters producers, the other was intended for use in original systems, the third was a custom product. The highest efficiency of particulate filtration was demonstrated by the last filter, which was adapted to the engine.
PL
W artykule przedstawiono porównanie wyników badań przeprowadzonych na dynamicznej hamowni silnikowej. Parametry zarejestrowano podczas przejazdu zgodnego z wymaganiami procedury RDE (Real Driving Emissions). Wykorzystanie stanowiska badawczego umożliwiło określenie emisji masy i liczby cząstek stałych w powtarzalnych warunkach eksploatacji. Do badań wykorzystano trzy elementy, z czego jeden stanowił rozwiązanie OEM, drugi również przeznaczony był do wykorzystania w oryginalnych układach, trzeci stanowił produkt własny. Największą skuteczność filtracji wykazał filtr ostatni, który dostosowany został do specyfiki i warunków pracy silnika.
EN
Road transport holds for the largest share in the freight transport sector in Europe. This work is carried out by heavy vehicles of various types. It is assumed that, in principle, transport should take place on the main road connections, such as motorways or national roads. Their share in the polish road infrastructure is not dominant. Rural and communal roads roads are the most prevalent. This fact formed the basis of the exhaust emissions and fuel consumption tests of heavy vehicles in real operating conditions. A set of vehicles (truck tractor with a semi-trailer) meeting the Euro V emission norm, transporting a load of 24,800 kg, was selected for the tests. The research was carried out on an non-urban route, the test route length was 22 km. A mobile Semtech DS instrument was used, which was used to measure the exhaust emissions. Based on the obtained results, the emission characteristics were determined in relation to the operating parameters of the vehicles drive system. Road emission, specific emission and fuel consumption values were also calculated.
EN
In the M–T–E (man–technology–environment) system, human has a main influence on aircraft. In the article focused on M–T relations, which means human–technology, more accurately on a man impact on a plane, which is specify as human factor [3]. The role of human in this system can lead to an accident, caused by human mistake. In this article fa main question is how man effects on maintenance aircraft. To purpose the analysis the research was made with use of technical object – a simulator, which is located in Simulator Research Laboratory in Institute of Combustion Engines and Transport at Poznan University of Technology. The subject of analysis was a correctness of performing procedures, which every pilot is obligated to make before start operation. Based on tabular research result the analysis of chosen area was made.
PL
W układzie M–T–E na obiekty techniczne główne odziaływanie ma operator. W artykule skupiono się na relacji M–T, czyli człowiek–maszyna, a dokładniej na wpływie operatora na statek powietrzny, co określa się jako czynnik ludzki [3]. Rola jednostki w tym układzie może prowadzić do powstania wypadku spowodowanego błędem ludzkim. W artykule analizie poddano oddziaływanie człowieka na obsługę statku powietrznego. W celu dokonania analizy przeprowadzono badania z wykorzystaniem obiektu technicznego – symulatora, znajdującego w Laboratorium Badań Symulatorowych w Instytucie Silników Spalinowych i Transportu Politechniki Poznańskiej. Analizie poddano poprawność wykonywania procedur, które każdy pilot realizuje przed operacją startu. Na podstawie tabelarycznych wyników badań dokonano analizy niezawodności wybranego obszaru przy użyciu wskaźnika bezbłędności.
8
Content available remote The risk of hazards analysis in unmanned aerial vehicle flight
EN
Along with development Commercial Air Transport were observed increase popularity of general aviation, include RPAS (Remotely Piloted Aircraft System). In manned air transport through years created a lot of standards and regulations. For still developing RPAS not created any official rules came from ICAO. This article is a trial to arranged available and commonly using methods risk management hazard to RPAS area. Prepared a list of 72 questions about the hazard sources occurring in the analyzed area. The answers allow to identify 45 sources of hazard. Based on them, 18 hazards were identified. Guided by the ideas and good practices of manned aviation, it is necessary to harmonize legal regulations concerning safety management in unmanned flights.
PL
Wraz z rozwojem lotnictwa komercyjnego, obserwuje się również rosnącą popularność lotnictwa ogólnego, w tym Bezzałogowych Statków Powietrznych (BSP). W załogowym transporcie lotniczym przez lata powstało wiele norm i przepisów prawnych dotyczących zarządzania ryzykiem. Dla wciąż rozwijających się BSP nie stworzono jeszcze, na tym obszarze zarządzania zaawansowanych zasad. Niniejszy artkuł jest, więc próbą adaptacji dostępnych i powszechnie wykorzystywanych metod zarządzania ryzykiem zagrożeń do obszaru BSP.Opracowano listę 72 pytań o występowanie źródeł zagrożeń w badanym obszarze analiz. Odpowiedzi pozwoliły na rozpoznanie 45 źródeł zagrożeń. Na ich podstawie zidentyfikowano 18 zagrożeń. Kierując się ideami i dobrymi praktykami lotnictwa załogowego, należy doprowadzić do ujednolicenia unormowań prawnych dotyczących zarzadzania bezpieczeństwem w lotach bezzałogowych.
9
Content available remote Risk assessment of remotely piloted aircraft systems
EN
The intensive growth in the popularity of Remotely Piloted Aircraft Systems (RPAS) used for recreational, sporting and other purposes, may lead to an increase in accidents and incidents involving them. Therefore, it is advisable to raise the awareness of all users, related to safety issues, to harmonize standards and procedures applicable at international and national level. The article presents the legal conditions for unmanned operations and the risk assessment methods used in areas of human activity. On this basis, an original method of risk assessment in unmanned systems was proposed. The method can be part of the operating instructions of the RPAS operator. At the end, final conclusions were drawn up.
PL
Intensywny wzrost popularności bezzałogowych statków powietrznych wykorzystywanych zarówno w celach rekreacyjnych, sportowych, jak i innych, może być przyczyną zwiększenia liczby wypadków i incydentów z ich udziałem. Celowe jest więc podnoszenie świadomości użytkowników związanej z zagadnieniami bezpieczeństwa oraz ujednolicanie norm i procedur obowiązujących na poziomie międzynarodowym i krajowym. W artykule przedstawiono uwarunkowania prawne dotyczące operacji bezzałogowych statków powietrznych. Dokonano przeglądu metod oceny ryzyka wykorzystywanych w różnych dziedzinach działalności ludzkiej. Zaproponowano autorską metodę oceny ryzyka zagrożeń w systemach użytkowania bezzałogowych statków powietrznych, która może zostać częścią instrukcji operacyjnej operatora lotniczego. Na zakończenie, podano przykłady postępowania wobec ryzyka i sporządzono wnioski.
10
Content available remote Exhaust emissions from a EURO 6c compliant PC vehicle in real operating conditions
EN
The current EURO 6c standard has introduced a limit on the number of solid particles for spark ignition engines equal to that for compression ignition engines (6x10e11). To meet the requirements, manufacturers install particulate filters in the exhaust systems of most new engines. The article presents the results of vehicle testing with this solution during the drive carried out in accordance with the RDE procedure. The measurement results, after taking into account the Conformity Factor in relation to the approval limits, confirmed the efficiency of aftertreatment system in terms of both gas and solid components.
PL
Obecna norma EURO 6c wprowadziła limit liczby cząstek stałych dla silników z zapłonem iskrowym równy temu dla silników z zapłonem samoczynnym (6x10e11). By spełnić wymagania, producenci instalują filtry cząstek stałych w układach wylotowych większości nowych silników. W artykule przedstawiono wyniki badań pojazdu z tym rozwiązaniem podczas przejazdu przeprowadzonego zgodnie z procedurą RDE. Wyniki pomiarów po uwzględnieniu współczynnika Conformity Factor w stosunku do limitów homologacyjnych potwierdziły skuteczność oczyszczania spalin zarówno pod względem emisji składników gazowych, jak i cząstek stałych.
EN
Aviation is becoming more and more popular. It is influenced, inter alia, by the development of general aviation (GA) and unmanned aerial vehicles (UAV). Due to the increasing number of qualified UAV users (in April 2018 there were 6846 operators in Poland with a valid certificate of qualifications) and those performing only recreational flights, it is important to ensure an acceptable level of risk in these operations. Using the available methods, the risk of five exemplary unmanned operations was assessed. The results were compared to determine their validity.
PL
Lotnictwo staje się coraz bardziej powszechne. Wpływ na to ma między innymi rozwój lotnictwa ogólnego (general aviation, GA) i bezzałogowych statków powietrznych (BSP). Liczba kwalifikowanych użytkowników BSP (w kwietniu 2018 r. było w Polsce 6846 operatorów z ważnym świadectwem kwalifikacji) i tych wykonujących tylko loty rekreacyjne zwiększa się. Istotne jest więc zapewnienie dopuszczalnego poziomu ryzyka zagrożeń w tych operacjach. Za pomocą dostępnych metod oceniono ryzyko zagrożeń podczas pięciu przykładowych operacji bezzałogowych. Wyniki zestawiono ze sobą celem określenia miarodajności otrzymanych rezultatów.
EN
The article presents a part of the work done in a research and development project being made by SWIATEK Lech Swiatek company. It describes the comparison of different fuels used in piston engines with JET-A1 turbine engine fuel. Next, the proposed combustion process of JET-A1 fuel and a prototype one-cylinder engine are described. In details, a special cylinder head and direct injection programmable computer are presented. In the next part, a designed and built test stand is described. Finally, the results and conclusions are presented. The designed test stand enabled to perform assumed tests. The innovative JET-A1 combustion process was possible to perform and the power and torque were higher in 1900-3000 rpm range than with the gasoline fuel. The designed GDI programmable injection computer enabled to fully control the injection and ignition parameters.
EN
The article presents selected problems concerning tests of toxic exhaust emissions from engines of vehicles, mobile devices, engines used in gardening and construction works. For this group of engines, this type of testing is carried out primarily in laboratory conditions, however, variable load conditions during actual operation justify efforts to determine the level of emissions in real operating conditions. Research in real operating conditions for different engine categories becomes increasingly more standard, in this aspect, it is necessary to verify the state of knowledge and methodology in the aspect of testing engines of machines and mobile devices. The research performed by the authors was the first of this type using PEMS equipment, hence some conclusions and observations can be made from the obtained results. At present, the type approval procedures for the engine group in question do not account for emissions tests in real operating conditions, while also missing any description of a standardized research methodology. In addition, the engine group in question is not really suitable for testing in real conditions. An introduction to research aimed at developing an exhaust emission test methodology in real operating conditions of mobile device engines was included in the article.
EN
The article presents toxic exhaust components emission measurement results as well as solid particles mass and number. The test involved a direct gasoline injection engine, in which special attention should be paid to the particulates number emission. Small diameters of nanoparticles make them particularly dangerous to human health. Nowadays, vehicle engines are constantly improved and modernized as a result of the need to meet existing exhaust gas emission standards. One of the few ways to determine the actual content of toxic and harmful compounds in the exhaust gases is the RDE (Real Driving Emissions) procedure, the requirements of which apply from 2016 for new vehicles, and from 2019 will apply to all registered passenger cars. The RDE procedure does not replace the WLTP (World Light-Duty Vehicle Test Procedure), but complements it. The tests on the dynamometer are separated from external conditions such as traffic volume or congestion and are not a sufficient indicator of emissions in real traffic conditions.
EN
The LTO cycle (Landing and Take-off cycle) is a research method used for jet engines certification. The measurements are performed in stationary conditions. With the development of aviation, the LTO test started to be carried out more often, but not for its’ original purpose. A new aim was an assessment impact of aircraft movement on environment in airports area. LTO cycle consists of four phases (according to ICAO Annex 16): take-off, climb out, approach and taxi/idle. Every airport has different infrastructure, what affects on time during basic flight operations especially for a taxi phase. To rate exhaust emission from aircrafts during basic fly operations duration time should be adjusted to every single airport. As a research area Poznań-Ławica Airport which is located in Poland, was adopted. Based on parameters calculated specially for this airport it is possible to computed there emission from the mostly used aircraft.
EN
The article’s aim was to compare an ecological effectiveness of a common jetliner with 189 passenger capacity flying on two CFM engines and a very light jet business aircraft designed to carry up to 8 people on board. The carried-out analysis showed that the NOx emission per passenger in Very Light Jet (VLJ) is three times higher than in common jet airliner, furthermore there is 15 times difference in CO emission. Based on the results of the analysis, it can be stated that it is appropriate to extend the certification of engines to smaller units, as well as to adjust the LTO test beyond laboratory conditions.
EN
Global air traffic doubles every 15 years. Therefore, aviation emission grows as well. It is advisable to look for an alternative air-crafts’ propulsion for both commercial and general aviation (usually flying closer to the ground). There are many prototypes proposed by homemade projects, through companies wanting to extend their offer. There are also several more advanced constructions ready to self-set or serially produced. In the article the main topic are electric aircrafts as an example of possibility to reduce the toxic com-pounds emission. According to the analysis some of companies specializing in unmanned aircraft production, starting to expand their business with manned products. In the article, analyses of electric aircrafts different models, which are available on market and present-ed the comparisons characteristics based on e.g. cruise speed, range for every model or charging time were made and conclusions about alternative aircraft propulsions, were made.
18
Content available Analysis of electric motor vehicles market
EN
The increasingly restrictive standards related to exhaust emissions from cars make difficult the development of internal combustion engines. The activities undertaken in the design of internal combustion engines are mainly based on downsizing, e.g decreasing the engine's displacement. The main direction in the development of vehicle propulsion is to reduce carbon dioxide emissions. It is expected to reduce CO2 emissions in 2020 to reach 95 g/km. Electric vehicles achieve low noise levels and do not emitted a burn, and thus, their use leads to a reduction in the amount of toxic exhaust gases in the air. The aspect of reducing emissions of harmful exhaust compounds and activities focusing on downsizing on the market of combustion engine cars leads to a significant increase the number of electric vehicles. In 2018 around 95 million motor vehicles were registered in the world, of which around 12 million in the European Union and 273 thousand in Poland. The number of electric vehicles among all sold is around 5.5%. Every year new, more technologically advanced models appear on the electric vehicle market. In 2018, the most popular model was the Nissan LEAF and the BAIC EC-Series. A large number of Renault ZOE have also been sold. In article analyzed different models of electric vehicle, which are available on market and presented the characteristics based on e.g. price per 100 kilometers, range for every model or charging time.
PL
W artykule przedstawiono wyniki symulacji przepływu gazów wylotowych przez trzy konfiguracje ceramicznego nośnika umieszczonego w układzie wylotowym silnika. Nośniki różniły się parametrami gęstości cel na całej długości filtra. Przebadano filtr o stałym parametrze CPSI (ang. Cell per Square Inch), filtr o dwóch różnych gęstościach cel oraz nośnik potrójny. Dla każdego z elementów filtra wprowadzone zostały warunki brzegowe, które określają charakter przepływu oraz definiują rodzaj powierzchni danego elementu. Określony został także skład gazów wylotowych, których przepływ jest symulowany. Warunki początkowe symulacji zawierają dane dotyczące ciśnienia, temperatury oraz prędkości przepływu. Do przeprowadzenia symulacji wykorzystano oprogramowanie AVL Fire Aftertreatment. Program stanowi wiodące narzędzie do symulacji CFD w dziedzinie silników spalinowych.
EN
The article presents the results of exhaust gas flow simulation by three configurations of a ceramic support placed in the engine exhaust system. The carriers differed in the cell density parameters along the entire length of the filter. A filter with a fixed CPSI (Cell per Square Inch) parameter, a filter with two different cell densities and a triple support were tested. For each element of the filter, boundary conditions have been introduced, which define the nature of the flow and define the type of surface of a given element. The composition of the exhaust gases whose flow is simulated was also determined. The initial conditions of the simulation include data on pressure, temperature and velocity. AVL Fire Aftertreatment was used to carry out the simulation. The program is a leading tool for CFD simulation in the field of internal combustion engines.
PL
W artykule omówiony został wpływ konfiguracji pozasilnikowych układów oczyszczania spalin na uzyskiwaną temperaturą gazów w poszczególnych punktach układu wylotowego. Reaktory katalityczne i filtry do skutecznego oczyszczania gazów wymagają m. in. określonej temperatury. Temperatura ta zmniejsza się wraz z odległością od kolektora wylotowego. Badania przeprowadzone w artykule polegały na pomiarze temperatury spalin w różnych miejscach układu w symulowanych warunkach rzeczywistych na silnikowej hamowni dynamicznej w aspekcie zastosowania filtra cząstek stałych i jego skutecznego oczyszczania. Badanie temperatury przy pomocy termopar pozwoliło na ocenę możliwości ich zadziałania podczas eksploatacji miejskiej i pozamiejskiej w symulowanych warunkach rzeczywistych.
EN
The article discusses the effect of exhaust aftertreatment systems configuration on the resulting exhaust gas temperature at selected points of the exhaust system. Catalytic reactors and particle filters must reach a specific temperature in order to effectively perform their functions. The temperature they obtain decreases with the increasing distance from the exhaust manifold, as the gases cool along the way. The performed research consisted of measuring the exhaust gas temperature in various places of the exhaust system in simulated driving conditions mapped on the dynamic engine brake station in the aspect of using a particulate filter and its resulting operating efficiency due to the temperature. Measuring the temperature using thermocouples allowed to assess the probability of achieving full operation of the filters during urban and extra-urban exploitation in a simulation of real driving conditions.
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