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    Wyświetlanie 1-3 z 3
    Tytuł:
    Evaluation of changes in fuel delivery rate by electromagnetic injectors in a common rail system during simulated operation
    Autorzy:
    Kamiński, Mariusz
    Budzyński, Piotr
    Hunicz, Jacek
    Józwik, Jerzy
    Powiązania:
    https://bibliotekanauki.pl/articles/1841746.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    common rail
    fuel delivery rate
    injector operation
    Opis:
    The objective of this study was to determine changes in fuel delivery rate by common rail system injectors during their simulated operation on a test stand. Four Bosch injectors used, among others, in Fiat 1.3 Multijet engines were tested. The injectors were operated on a test rig at room temperature for 500 hours (more than 72 million work cycles). During the test, pressure and injection frequency were changed. Changes in the operating parameters were estimated based on obtained injection characteristics and effective flow area determined thereby. The observed changes in fuel delivery rate were compared with results of the surface analysis of control valves and nozzle needles. Despite the stated lack of wear, significant changes in the dynamics of injector operation were observed, particularly at short injection times. Small pilot injections cannot be corrected by the fuel injection control system because they do not affect the changes in torque; however, they do affect the combustion process. This creates conditions for increased emission of toxic exhaust components.
    Źródło:
    Eksploatacja i Niezawodność; 2021, 23, 2; 352-358
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    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:
    Methodology of testing common rail fuel injectors with the use of Gauss’s formulas
    Autorzy:
    Stoeck, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2097494.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    Common Rail fuel injector
    extension of diagnostic procedures
    Gauss’s formulas
    resulting fuel delivery fields
    wtryskiwacze Common Rail
    poszerzenie procedur diagnostycznych
    formuły Gaussa
    pola wynikowe dawkowanego paliwa
    Opis:
    The paper presents the methodology of testing common rail fuel injectors, which consisted in extending the standard diagnostic procedures with the analysis of the resulting fuel delivery fields. The calculations were carried out in a popular spreadsheet, using Gauss's formulas (the so-called shoelace formula). In this way, the necessity to modify the test bench software was eliminated, as the analytical process took place after the end of the active experiment phase. It has been shown that the proposed solution should be particularly useful in problematic situations where clear-cut verification and assessment of the technical condition of the fuel injectors is sometimes difficult, as shown in the example. In addition, implementation in a digital environment allows the presented algorithms to be reused in research with a similar profile.
    Źródło:
    Combustion Engines; 2021, 60, 1; 11--15
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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