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    Wyświetlanie 1-5 z 5
    Tytuł:
    The possibility of energy consumption reduction using the ECO driving mode based on the RDC test
    Autorzy:
    Cieślik, Wojciech
    Szwajca, Filip
    Golimowski, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/2097469.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    electric vehicle
    energy flow
    regenerative braking
    powertrain
    driving mode
    pojazd elektryczny
    przepływ energii
    hamowanie odzyskowe
    układ napędowy
    tryb jazdy
    Opis:
    The greenhouse effect and overall climate changes are the main reasons for developing ecological powertrain units dedicated to road vehicles. An electrical drivetrain without using conventional combustion engines fueled by hydrocarbon fuels is an effective method to significantly reduce CO2 emissions from the fleet. It is particularly vital in 2020 emission regulations aspects, and continuously the number of vehicles increasing. In this paper battery electric drive system of a small size passenger car was analyzed in terms of two different drive modes in cooperation with two recuperative braking modes. The research was carried out with real driving condition test requirements and driving parameters recording. Based on data obtained from OBD signals, energy flow and torque distribution have been specified. In results, overall reducing energy consumption has been achieved with ECO mode compared to normal mode. Selection of the driving mode ECO has a positive impact on reducing the state of charge saving more than 5%, taking into account the whole RDC test; greater energy consumption reductions were observed in selected test areas.
    Źródło:
    Combustion Engines; 2020, 59, 3; 59--69
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reverse engineering of research engine cylinder-head
    Autorzy:
    Cieślik, Wojciech
    Szwajca, Filip
    Wisłocki, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/2097636.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    reverse engineering
    research engine
    3D measuring system
    tomographic measurement
    variable valve timing
    inżynieria odwrotna
    silnik badawczy
    trójwymiarowy system pomiarowy
    pomiar tomograficzny
    zmienne fazy rozrządu
    Opis:
    The pursuit of increasing the efficiency of internal combustion engines is an ongoing engineering task that requires numerous research efforts. New concepts of injection or combustion systems require preliminary investigation work using research engines. These engines, usually single-cylinder, make it possible to isolate a single variable in a complex combustion mixture preparation process, thus enabling analysis of the changes being made. However, these engines are relatively expensive and their designs are offered by a limited number of manufacturers. The authors of this paper have successfully undertaken the engineering task of modifying an existing research engine cylinder head in such a way as to implement an electronically controlled variable valve timing system of the intake system. The process of reverse engineering, together with design assumptions that finally contributed to the construction of the assumed solution has been described in this paper.
    Źródło:
    Combustion Engines; 2022, 61, 2; 73--82
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of alcohol admixture with gasoline on carbon build-up and fuel injectors performance
    Autorzy:
    Stępień, Zbigniew
    Pielecha, Ireneusz
    Cieslik, Wojciech
    Szwajca, Filip
    Powiązania:
    https://bibliotekanauki.pl/articles/2087005.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    spark ignition combustion engine
    direct injection
    fuel injectors
    injector coking
    gasoline
    alcohol
    injector operating parameters
    Opis:
    The operating conditions of injectors in spark ignition engines with direct fuel injection make them susceptible to coking, which leads to a reduced quality of fuel atomization. This can be observed by a drop in performance and an increase in exhaust emissions, especially particulate matter. One effective method of reducing injector coking is by using detergentdispersing gasoline additives. The article describes the effect of using an admixture with a varied alcohol content on the quantitative and qualitative fuel atomization indicators. The research consisted of a 48-hour engine test, done in accordance with the CEC F-113-KC procedure (CEC-F-113 test). After each test cycle, the injectors underwent optical tests with the use of an isochoric chamber. The spray penetration and surface area were analyzed at a set of different fuel injection parameter values. The research performed resulted in determining the influence of each tested admixture on the change of injection time and on the geometric indicators of the fuel spray. The obtained characteristics of the engine in operation and conducted stationary tests enabled the operational evaluation of the impact an alcohol admixture with gasoline fuels had on key engine parameters.
    Źródło:
    Eksploatacja i Niezawodność; 2022, 24, 2; 226--236
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Food Waste Management Using the Hermetia Illucens Insect
    Autorzy:
    Czekała, Wojciech
    Janczak, Damian
    Cieślik, Marta
    Mazurkiewicz, Jakub
    Pulka, Jakub
    Powiązania:
    https://bibliotekanauki.pl/articles/123656.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    waste management
    food waste
    environmental protection
    circular economy
    Hermetia illucens
    Opis:
    In modern agricultural biogas plants, the biowastes are being increasingly used for the biogas production. The food waste is also widely used in larvae breeding. This is an important because, based on biowaste, its proper management and green energy production is possible. This study aims to determine the biogas and methane efficiency of the Hermetia illucens larvae that were fed using the food waste. In the research on the biogas and methane efficiency, the Hermetia illucens larvae were used. The total solids (TS) of the substrate equals 30.35%, and the volatile solids (VS) content was 92.31% of TS. The larvae were fed only with the food waste of plant origin. The obtained substrates were homogeneous. The experiment was carried out under mesophilic anaerobic digestion conditions – 39°C in the 21-chamber biofermentor set in the Institute of Biosystems Engineering in Poznań University of Life Sciences. The anaerobic digestion process in the batch reactor ran correctly. Fermentation inhibition was not detected. The biogas efficiency for larvae amounted to 198.75 m3∙Mg-1 fresh mass (FM). On the other hand,the methane efficiency, amounted to 127.73 m3∙Mg-1, at the methane concentration of 64.27%. On the basis of the research, it was found that the larvae feeding on food waste can be used directly as anaerobic digestion in the bioconversion process.
    Źródło:
    Journal of Ecological Engineering; 2020, 21, 4; 212-216
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The “biological chamber” method – use of autologous platelet-rich plasma (PRP) in the treatment of poorly healing lower-leg ulcers of venous origin
    Autorzy:
    Waniczek, Dariusz
    Mikusek, Wojciech
    Kamiński, Tomasz
    Wesecki, Mariusz
    Lorenc, Zbigniew
    Cieślik-Bielecka, Agata
    Powiązania:
    https://bibliotekanauki.pl/articles/1395656.pdf
    Data publikacji:
    2015-06-01
    Wydawca:
    Index Copernicus International
    Tematy:
    chronic lower-leg venous ulcer
    autologous platelet-rich plasma
    Opis:
    Wound healing is a complex pathophysiological process, in which platelets play a crucial role. Platelet alpha-granules release growth factors to the wound bed; the factors are necessary in the healing process. In chronic wounds, such as poorly healing lower-leg ulcers of venous origin, there is decreased activity of multiple growth factors, so the concept of exogenous delivery of such factors seems a logical strategy. Platelet-rich plasma therapy in patients with lower-leg ulcers of venous origin combined with conventional treatment methods (previously ineffective in these patients) seems, based on our observation, an important adjunct leading to recovery. The aim of the study was to present an original method of autologous platelet-rich plasma application through the creation of a sort of “biological chamber” containing a concentrate of growth factors. Material and methods. The described therapy was implemented in 10 patients, who had been ineffectively treated for more than one year in the outpatient setting. Patients with exacerbation of inflammatory process, signs of wound infection and ankle brachial pressure index < 0.8 were excluded from the study. After the application of platelet-rich plasma, further treatment was continued with the use of moist therapy and compression therapy according to a uniform regimen. Results. Complete healing was achieved within 4-10 weeks from the beginning of the product administration in all patients. Conclusion. The presented method seems technically simple, effective and relatively inexpensive
    Źródło:
    Polish Journal of Surgery; 2015, 87, 6; 283-289
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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