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    Wyświetlanie 1-5 z 5
    Tytuł:
    Identification of the internal combustion engine malfunctions based on the vibrations of the vehicle body
    Autorzy:
    Mamala, Jarosław
    Prażnowski, Krzysztof
    Graba, Mariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/133120.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    vibrations
    vehicle diagnostics
    Fourier transform
    drgania
    diagnostyka pojazdu
    transformacja Fouriera
    Opis:
    Selected parameters of an IC engine were correlated with vibrations transferred to the vehicle body with the aim of identifying engine malfunctions. Registered acceleration component signals were analyzed in the aspect of frequency. A reasoning model based on devised identification matrix was used to classify obtained data. This allowed the authors to estimate the possibility of research object damage/malfunctions with an assumed degree of probability.
    Źródło:
    Combustion Engines; 2019, 58, 4; 176-181
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of charge exchange in a single-cylinder of spark ignition engine
    Autorzy:
    Drabik, Dawid
    Mamala, Jarosław
    Prażnowski, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/133635.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    engine
    efficiency
    compression ratio
    pressure
    silnik
    wydajność
    stopień sprężania
    ciśnienie
    Opis:
    The article presents the results of tests carried out on a single-cylinder of spark-ignition engine. The charge exchange process in the combustion chamber is very important to determine the possibility of improving the overall efficiency of the engine. Describes of impact modifications engine on open indicator diagrams. Open indicator diagrams show that the higher compression ratio is assumed, the higher the pressure in the system is. First parts of the research describes analysis of charge exchange on not working engine. Results of research presents different open indicators diagrams. Then the pressure results were obtained on the working engine. The possibilities of improving the overall efficiency of the engine by reducing the pumping loss, associated with the replacement of the air fuel mixture, were presented. The article describes the modification of a spark-ignition engine that affects the pressure change in the combustion chamber. The use of innovative methods of regulating the compression pressure gives a lot of positive effects.
    Źródło:
    Combustion Engines; 2019, 58, 4; 274-279
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy consumption of a passenger car with a hybrid powertrain in real traffic conditions
    Autorzy:
    Bieniek, Andrzej
    Graba, Mariusz
    Mamala, Jarosław
    Prażnowski, Krzysztof
    Hennek, Krystian
    Powiązania:
    https://bibliotekanauki.pl/articles/2202524.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    energy consumption
    hybrid vehicle
    road tests
    energy consumption analysis
    zużycie energii
    napęd hybrydowy
    testy drogowe
    analiza zużycia energii
    Opis:
    The analysis of energy consumption in a hybrid drive system of a passenger car in real road conditions is an important factor determining its operational indicators. The article presents energy consumption analysis of a car equipped with an advanced Plug-in Hybrid Electric Drive (PHEV), driving in real road conditions on a test section of about 51 km covered in various environmental conditions and seasons. Particular attention was paid to the energy consumption resulting from the cooperation of two independent drive units, analyzed in terms of the total energy expenditure. The energy consumption obtained from fuel and energy collected from the car’s batteries for each run over the total distance of 12 500 km was summarized. The instantaneous values of energy consumption for the hybrid drive per kilometer of distance traveled in car’s real operating conditions range from 0.6 to 1.4 MJ/km, with lower values relating to the vehicle operation only with electric drive. The upper range applies to the internal combustion engine, which increases not only the energy expenditure in the TTW (Tank-to-Wheel) system, but also CO2 emissions to the environment. Based on the experimental data, the curves of total energy consumption per kilometer of the road section traveled were determined, showing a close correlation with the actual operating conditions. Obtained values were compared with homologation data from the WLTP test of the tested passenger car, where the average value of energy demand is 1.1 MJ/km and the CO2 emission is 23 g/km.
    Źródło:
    Combustion Engines; 2022, 61, 4; 15--22
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of biogas to supply the high compression ratio engine
    Autorzy:
    Bieniek, Andrzej
    Mamala, Jarosław
    Graba, Mariusz
    Prażnowski, Krzysztof
    Śmieja, Michał
    Wereszczyński, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/134102.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    biogas
    high compression ratio engine
    emission
    low power cogeneration system
    biogaz
    silnik o zwiększonym stopniu sprężania
    emisja
    układ kogeneracyjny małej mocy
    Opis:
    The study concerns the use of biogas as a fuel for supplying a modified self-ignition engine. As a result of the modifications made, the compression ratio was reduced and the engine was equipped with an ignition system and an electronically activated engine throttle. The changes have made it possible to burn biogas in a high compression ratio engine. The paper presents the results of research conducted on a low power cogeneration system with engine that drives an electrical machine cooperating with a 380/400 V network. The analysis includes, among other things, the possibility of producing electricity using biogas. The paper presents the influence of regulatory parameters such as the volume and composition of the supplied gas mixture and the degree of throttle opening on the obtained engine operation indicators and the driven electric machine. The tests were carried out in relation to the obtained ecological indicators depending on the concentration in the exhaust of such substances as: HC, CO, NOx.
    Źródło:
    Combustion Engines; 2019, 58, 4; 40-46
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of energy consumption in the acceleration process of a passenger car
    Autorzy:
    Mamala, Jarosław
    Graba, Mariusz
    Bieniek, Andrzej
    Prażnowski, Krzysztof
    Hennek, Krystian
    Kołodziej, Szymon
    Mazurek, Bartosz
    Sproch, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/2097656.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    acceleration
    energy consumption
    vehicle dynamic
    dynamic index
    przyspieszenie
    zużycie energii
    dynamika pojazdu
    wskaźnik dynamiki
    Opis:
    The analysis of the vehicle acceleration process is a current topic based on the aspects related to the general characteristics of the car, its parameters, design, drive unit performance, and the influence of external factors. However, the ability to accelerate is essential from the point of view of the active safety of the car. Often the dynamic parameters are determined on the basis of the car acceleration test carried out on a level road with good surface in terms of the acceleration time is not reliable and the credibility of such results depends on many factors. Therefore in the article, the authors assessed the dynamic and energy parameters of the car motion, in which the intensity of acceleration of the car with different intensities was examined. The acceleration intensity test was carried out from the set initial speed of the car of 45 km/h to the final speed of 120 km/h at a constant gear ratio, and the set intensity of the acceleration process resulted from the constant throttle with a constant deflection of the accelerator pedal. Acceleration was carried out in two variants, the first for a normal internal combustion engine and the second for the same engine but additionally equipped with a short-term boost system. In this way, it influences the increase in power and energy in the car drive system, changing its acceleration intensity. Variable car acceleration intensity was obtained in the range from 0.12 to 1.37 m/s2, and energy consumption at the level of 0.4 to 1.2 MJ in the distance of 1/4 mile. The article proposes a combination of energy parameters and engine power in order to assess the acceleration dynamics, for this purpose, the specific energy consumption of the car was determined, ranging from 0.35 to 2.0 J/(kg∙m), which was related to the engine power, denoting it with the dynamics index. The study focuses on the assessment of the relationship between the specific energy consumption and acceleration of passenger cars in the available powertrain system using a new dynamics index. The proposed dynamics index combines the energy and dynamic parameters of the car to be able to objectively quantify the acceleration process.
    Źródło:
    Combustion Engines; 2022, 61, 3; 35--44
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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