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    Wyświetlanie 1-4 z 4
    Tytuł:
    Problems with glow plug - a review
    Autorzy:
    Woźniak, Marek
    Ozuna, Gustavo
    Siczek, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/2097536.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    CI engine
    glow plug
    failure
    silnik ZI
    świeca żarowa
    awaria
    Opis:
    Despite the development of hybrid and electric vehicles, a many-million population of cars with combustion engines, and particularly CI engines occurs on the roads. Also, many stationary CI engines are still utilized. Despite their improved technologies and characteristics the modern CI engines negatively affect an environment due to cold starting problems. Below 0°C, engine starts are problematic due to the decreased battery performance and the spray characteristics, the increased ignition delay time, and the engine oil viscosity. Therefore, various glow plugs are applied to facilitate this process. Types, features, and applications of glow plugs in various engines have been discussed in the paper. One case of failure of glow plug has been presented in the article, including the cause of it.
    Źródło:
    Combustion Engines; 2021, 60, 3; 11--30
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on selected parameters of engine with the active combustion chamber
    Autorzy:
    Głogowski, Michał
    Woźniak, Marek
    Szydłowski, Tomasz
    Siczek, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/24202476.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    combustion engine
    active combustion chamber
    variable compression ratio
    silnik spalinowy
    aktywna komora spalania
    zmienny stopień sprężania
    Opis:
    The present study was focused on the combustion engine with a variable compression ratio (VCR), namely the four-stroke air-cooled engine with the active combustion chamber (ACC). An indicated pressure, torque, power, and specific fuel consumption of that engine were investigated experimentally as a goal of the present study. Experiments were conducted using two versions of an engine. Two parameters particularly influencing the ACC engine performance including the maximum compression ratio CRmax and the indicator γfm determining the correct operation of the ACC system, were described. It was found that the ACC engine allowed avoiding detonation combustion without changing the amount and composition of the combustible mixture, and even without delaying the ignition advance angle. In addition, the possible range of control of the combustion process allowed the ACC engine to operate with different types of hydrocarbon fuels, for example, in the form of petrol with various alcohol admixtures. The very intense flow of the combustible mixture inside the cylinder of the ACC engine allowed describing the combustion in the ACC engine with zero-dimensional mathematical models with the dual Vibe function providing the proper characterization of the heat release process. The use of very high maximum compression ratios allows the ACC engine to operate to a certain extent as a Homogeneous Charge Compression Ignition (HCCI) engine with high lambda coefficients.
    Źródło:
    Combustion Engines; 2023, 62, 3; 3--12
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Deposition effect of carbon deposits on charge flow in EGR valve equipped CI engine
    Autorzy:
    Woźniak, Marek
    Siczek, Krzysztof
    Zakrzewski, Sergiusz
    Just, Paweł
    Ozuna, Gustavo
    Onescu, Constantin
    Powiązania:
    https://bibliotekanauki.pl/articles/24202415.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    CI engine
    EGR valve
    carbon deposits
    CFD analysis
    silnik ZS
    zawór EGR
    depozyty węglowe
    analiza CFD
    Opis:
    The exhaust gas recirculation (EGR) valve regulates the exhaust gas flow between the engine exhaust manifold and the inlet one. This allows the inlet air to warm up, improving fuel evaporation and reducing the combustion temperature of the charge. Such a valve reduces the number of harmful substances in the exhaust gases. The valve tends to stick when too much sediment builds on the walls of the exhaust system, especially during driving in urban conditions or when leaks in the vacuum or exhaust pipes occur. A faulty valve causes the engine to run unevenly at idle speed and under light loads. The defective EGR valve weakens the inlet manifold capacity, increases combustion, causes clogging of the particulate filter and damage to the lambda probe. Blocked EGR valve may lead to engine immobilization as a result of its computerized control system operations. A model of an EGR valve for a selected diesel engine was developed to determine velocity distribution of the load flowing in it for different values of the degree of valve opening and the volume of deposits on the valve walls. The volume of accumulated carbon deposits on the walls of the EGR valve was measured using a real engine. Based on the recorded mileage of the vehicle, the assumed average speed of the car and the driving style of the driver and the intensity of deposition of carbon particles on the walls was estimated.
    Źródło:
    Combustion Engines; 2023, 62, 1; 26--35
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of SiO2 nanoparticles content in engine oil on tribological properties of valvetrain chain transmission components
    Autorzy:
    Spinache, Edward
    Trandafir, Adrian
    Diaconu, Mihai
    Ozuna, Gustavo
    Wozniak, Marek
    Kubiak, Przemyslaw
    Siczek, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/134029.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    valvetrain
    chain transmission
    wear
    friction
    SiO2 nanoparticles
    rozrząd silnika
    przekładnia łańcuchowa
    zużycie
    tarcie
    nanocząstki SiO2
    Opis:
    The drive from the crankshaft to the camshaft in an internal combustion engine is usually carried out by means of a cogged belt transmission or a chain transmission when high millage is required without service operations. The valvetrains in CI engines sometimes use the gear transmissions, and the historical rather bevel gear can be found in old cars of collectors or in some motorcycle engines. The chain gear used in SI engines has a two- or three-row chain with high strength, due the unevenness of loads that additionally induce chain pulling and valve timing deregulation. The chain transmission requires the use of pre-tensioners, usually self-acting and driven by springs or oil pressure. The vibrations and chain runout are limited using plastic guides placed on the outside of the long straight sections of the chain. The model of the chain transmission developed with the use of the Finite Elements Method, which operates under oil lubrication conditions, was analyzed. Such the model allowed obtaining weight and mass inertial moments of components. The aim of the study was to evaluate the effect of SiO2 nanoparticles content in engine oil on the friction between chain transmission components. The resulted values of the friction torque in the chain transmission operating in different conditions of lubrication have been presented in the paper.
    Źródło:
    Combustion Engines; 2019, 58, 4; 4-12
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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