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Wyszukujesz frazę "Wołak, A." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Definition of oil change intervals based on the analysis of selected physicochemical properties of used engine oils
Autorzy:
Gołębiowski, W.
Wolak, A.
Zając, G.
Powiązania:
https://bibliotekanauki.pl/articles/134055.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
degradation
engine oil
oil change
Eraspec
FT-IR
in-service oil
degradacja
olej silnikowy
wymiana oleju
Opis:
The paper presents the results of a thorough analysis of selected physicochemical parameters of engine oils at the end of their useful life, based on the oil change intervals assumed by vehicle users. Twelve samples of used Castrol Edge 5W/30 synthetic oil and five samples of used Castrol Magnatec 10W/40 semi-synthetic oil were tested. The Eralytics's ERASPEC OIL device was used for the assessment of the following parameters: degree of oxidation, degree of nitration, degree of sulfonation, water content, glycol content, total base number (TBN), total acid number (TAN) and kinematic viscosity at 40°C and 100°C. The research was conducted on the basis of the ASTM E2412-10 standard. The results regarding the parameter limit exceedances have also been presented in the paper. For both synthetic and semi-synthetic oils, the exceedance of kinematic viscosity measured at 40°C was particularly striking. In fourteen samples (out of seventeen tested), at least one exceedance of the limit value (out of nine analyzed) has been observed.
Źródło:
Combustion Engines; 2018, 57, 1; 44-50
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes of properties of engine oils diluted with diesel oil under real operating conditions
Autorzy:
Wolak, A.
Zając, G.
Żółty, M.
Powiązania:
https://bibliotekanauki.pl/articles/973129.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
oil condition monitoring
lubricant properties
diesel particulate filter
DPF
degradation
reliability
dilution of the lubricating oil
monitorowanie stanu olejów
właściwości smarne
filtr cząstek stałych silnika Diesla
degradacja
niezawodność
rozcieńczenie oleju smarowego
Opis:
The aim of the article was to analyze changes in the trends of selected physical, chemical and functional properties of lubricating engine oil operating in a diesel-engine vehicle equipped with DPF. The vehicle was operated mainly in urban driving conditions (app. 70%), which impeded the DPF regeneration cycle and caused dilution of oil with unburned fuel. Changes in the following physical and chemical properties were assessed: the DF level in engine oil, viscosity (kinematic, dynamic HTHS and structural CCS), total base number, acid number as well as the degree of oxidation, nitration and sulphonation. The tests have shown that the amount of unburned fuel that goes to the engine crankcase due to the unfinished DPF regeneration cycle is as high as 26.0-34.6%. Dilution of the lubricating oil with fuel leads to a significant reduction of its viscosity - about 30% of the fuel content causes a decrease in the kinematic viscosity measured at 100°C to the level of 7.7 mm2/s. There was also a significant decrease in total base number (TBN) < 2 mg KOH/g, and an increase in the total acid number (TAN). Moreover, the results obtained were analyzed for potential effects that could have been caused during prolonged engine operation by assessing the content of trace elements in the samples taken.
Źródło:
Combustion Engines; 2018, 57, 2; 34-40
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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