Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Diesel engine" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 397
Tytuł:
Improved method of processing the output parameters of the diesel locomotive engine for more efficient maintenance
Autorzy:
Zvolenský, Peter
Barta, Dalibor
Grenčík, Juraj
Droździel, Pawel
Kašiar, Ľubomír
Powiązania:
https://bibliotekanauki.pl/articles/1841741.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
maintenance
locomotive
diesel engine
control parameters
Opis:
Modernization of aged rolling stock is one of the possibilities to adapt it to the current requirements for better environmental friendliness and economy of railway transport. However, some vehicle upgrades lead to new failures that were not observed in the original vehicles. The cause is the so-called “hybrid design”, built on a combination of original and selected new components. The aim of the work was to improve the situation with frequent failures and unavailability that occur on the modernized locomotive where a new diesel engine and new electronic control system was installed. Within the work, a simplified methodology for evaluating the outputs of diagnostic equipment was developped based on and applied to specific locomotive type and its diesel engine. The methodology resulted in a significant reduction of the time for assessing the condition of the vehicle’s diesel engine and more effective maintenance. The paper also presents other possibilities in the analysis of big data in the maintenance of rolling stock e.g. using fuzzy logic.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 2; 315-323
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of biodiesel blended fuel on the performance and emission characteristics of diesel engines – a review
Autorzy:
Zheng, Fangyuan
Cho, Haeng Muk
Xu, Changchun
Powiązania:
https://bibliotekanauki.pl/articles/2174181.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
biodiesel
paliwo
emisja spalin
diesel engine
fuel properties
engine performance
exhaust emission
Opis:
The internal combustion engine plays a vital role in transportation, industry, and shipping. However, diesel as one of the main fuels for internal combustion engines, caused many environmental and human health problems. In order to solve the problems, more researchers have been committed to the research of alternative fuels. Biodiesel is a renewable, sustainable alternative fuel, and its characteristics are similar to traditional diesel. It can be mixed with pure diesel. It has been found that a mix with pure diesel in a certain ratio can effectively reduce the negative effects caused by its characteristics, improve the combustion performance, and reduce the NOx and PM emissions. This article mainly reviews the effects of the mixture of biodiesel and diesel on engine combustion characteristics and exhaust emissions, including three parts: part (1) summarizes and analyzes the biodiesel’s production and characteristics, part (2) analyzes the engine’s performance under different working conditions, and part (3) studies and analyzes the exhaust emission under different working conditions.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 215--231
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability modeling and maintenance optimization of the diesel system in locomotives
Modelowanie niezawodności i optymalizacja utrzymania ruchu układu samoczynnego zapłonu w lokomotywach
Autorzy:
Zhang, Z.
Gao, W.
Zhou, Y.
Powiązania:
https://bibliotekanauki.pl/articles/301930.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
lokomotywowy silnik Diesla
model konkurujących zagrożeń oparty na wielokrotnym rozkładzie Weibulla
optymalizacja utrzymania ruchu
metoda przybliżonego łączenia parametrów (ACPM)
diesel engine of locomotive
multiple Weibull competing risk model
maintenance optimization
approximately combined parameter method(ACPM)
Opis:
Engine system is a prone-fault part in diesel locomotive and its malfunctions always occur regularly in different seasons in practice. However, the current maintenance policy in China has not attached deserving importance to seasonal influence, which is considered as one of the main causes for over/under-maintenance. To assess the current maintenance, in this study a double-fold Weibull competing risk model for summer and winter is developed using the real failure data (2008-2011) of locomotives from Urumqi Railway Bureau. Meanwhile, a new approach, termed as Approximately Combined Parameter Method (ACPM), is proposed to combine the initially estimated parameters into different folds, which can avoid a subjective determination of the model's parameters fold. After that, the combined parameters are used as initial values for maximum likelihood estimate (MLE) to achieve an accurate model. Necessary optimizations are introduced based on the chosen models. Results show that the maintenance period differs a lot between winter and summer, and the optimized maintenance can increase the availability and decrease cost more than the existing Policy.
Układ silnikowy stanowi podatną na uszkodzenia część lokomotywy spalinowej, a w praktyce jego awarie występują zawsze regularnie w zależności od pory roku. Pomimo tego, obecna polityka obsługowa w Chinach nie przywiązuje wystarczającej wagi do wpływu pór roku, co uważa się za główną przyczynę nadmiernych lub niedostatecznych działań obsługowych. Aby ocenić bieżące działania obsługowe, w niniejszym artykule opracowano model zagrożeń konkurujących dla lata i zimy, oparty na połączeniu dwóch rozkładów Weibulla, wykorzystujący rzeczywiste dane o uszkodzeniach (2009-2011) lokomotyw używanych przez Agencję Kolejową Urumqui. Jednocześnie zaproponowano nowe podejście, o nazwie Approximately Combined Parameter Method (Metoda Przybliżonego Łączenia Parametrów, ACPM), które polega na łączeniu wstępnie obliczonych parametrów w różne wielokrotności, co pozwala na uniknięcie subiektywnego wyznaczania liczby parametrów modelu. W celu otrzymania dokładnego modelu, połączone parametry wykorzystuje się jako wstępne wartości w estymacji metodą największej wiarygodności. Konieczne optymalizacje wprowadza się na podstawie wybranych modeli. Wyniki pokazują, że letni okres obsługowy różni się zasadniczo od zimowego, a zoptymalizowana obsługa może zwiększyć gotowość systemu i zmniejszyć koszty utrzymania ruchu w większym stopniu niż dotychczasowa polityka obsługowa.
Źródło:
Eksploatacja i Niezawodność; 2012, 14, 4; 302-311
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of biodiesel fuel on the basis of rape oil and isopropyl alcohol
Ocena wlasciwosci eksploatacyjnych paliwa oleju napedowego bio na podstawie oleju rzepakowego i alkoholu izopropylowego
Autorzy:
Zaharchuk, V.
Tkachuk, V.
Zaharchuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/791924.pdf
Data publikacji:
2011
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
biodiesel fuel
diesel engine
toxicity
isopropyl ester
methyl ester
rapeseed oil
diesel fuel
operating property
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of indicators sensitivity of emissions as a diagnostic parameter during the dynamic process of marine diesel engine
Identyfikacja wrażliwości wskaźników emisji jako parametrów diagnostycznych podczas procesów dynamicznych okrętowego silnika spalinowego
Autorzy:
Zadrąg, Ryszard
Bogdanowicz, Artur
Powiązania:
https://bibliotekanauki.pl/articles/329416.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
marine diesel engine
exhaust gas toxicity
dynamic states
emission
okrętowy silnik spalinowy
toksyczność spalin
stany dynamiczne
emisja
Opis:
The change of some parameters of an engine structure affects emission of harmful components in engine’s exhaust. This applies first of all to damages in a charge exchange system as well as in a fuel system and an engine supercharging system. These changes are significantly greater during dynamic states and in the time transient processes. It is possible to talk about different sensitivities of emission factors understood here as diagnostic parameters for the same extortion from the structure of the engine but executed in other load states. The article presents a diagnostic model of the engine in which the diagnostic symptoms are indicators and characteristics of the emission of gaseous exhaust components. The model was supplemented with the results of tests on the real object, which was a marine diesel engine. Propose measures of the sensitivity of the diagnostic parameter during dynamic processes - processes characterized by high variability of waveforms, which variability causes problems not only of measurement nature, but also often interpretive.
Zmiana niektórych parametrów struktury silnika wpływa na zmianę emisji składników szkodliwych w spalinach. Dotyczy to przede wszystkim uszkodzeń następujących w układzie wymiany ładunku a także w układzie paliwowym i układzie doładowania silnika. Zmiany te są zdecydowanie większe podczas trwania stanów dynamicznych i towarzyszących im procesów przejściowych. Można więc mówić o różnej wrażliwości wskaźników emisji rozumianych tutaj jako parametrów diagnostycznych na te same wymuszenia pochodzące od struktury silnika, ale realizowane w innych stanach obciążenia. W referacie przedstawiono model diagnostyczny silnika, w którym symptomami diagnostycznymi są wskaźniki i charakterystyki emisji gazowych składników spalin. Model uzupełniono wynikami badań na obiekcie rzeczywistym, którym był okrętowy silnik spalinowy. Zaproponowano również miary wrażliwości parametru diagnostycznego podczas procesów dynamicznych - procesów charakteryzujących się dużą zmiennością przebiegów, która to zmienność powoduje problemy nie tylko natury pomiarowej, ale również często interpretacyjnej.
Źródło:
Diagnostyka; 2019, 20, 3; 79-86
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Creating a ranking of diagnostic parameters for the dynamic process of marine combustion engine in the aspect of multi-criteria evaluations
Autorzy:
Zadrąg, R.
Powiązania:
https://bibliotekanauki.pl/articles/2073645.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
diagnostic
marine diesel engine
exhaust gas toxicity
multi-equation models
diagnostyka
silnik Diesla
toksyczność spalin
modele wielorównaniowe
Opis:
The change of some of the engine’s structural parameters affects the change of toxic compound emission in exhaust gases. It mainly applies to the damage sustained by the charge exchange system as well as the fuel system and the engine supercharging system. These changes are definitely higher during dynamic states and the related transient states. As such, it is possible to speak of a diverse sensitivity of the diagnostic parameters on the exact same excitations which come from the structure of the engine but are realized in other states of load. In the paper presented is the diagnostic model of an engine, based on the theory of multi-equation models, in which the diagnostic symptoms are the indices and characteristics of exhaust gas compound emissions. For the sake of this paper, the modal value of the structure parameters was assumed to be the change in the angle of advance of the fuel injection. The diagnostic model of the engine was supplemented with the results of research conducted on a station equipped with a single cylinder CI test engine. In previous works of the author, the information capacity index method (the Hellwig method) was suggested for the measurement of the sensitivity of a diagnostic parameter. Based on this method, a ranking of diagnostic parameters can be created, which divides the collection of diagnostic transients into stimulators, destimulators and nominants. This normalization of the collection seems to be helpful during making a diagnostic decision.
Źródło:
Journal of Polish CIMEEAC; 2016, 11, 1; 211--218
1231-3998
Pojawia się w:
Journal of Polish CIMEEAC
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ranking of toxic compound concentrations as diagnostic parameetrs of marine internal combustion engine
Autorzy:
Zadrąg, R.
Kniaziewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/259107.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
diagnostic model
Diesel engine
exhaust components
ranking of parameters
Opis:
Changing selected engine structure parameters, especially fuel system parameters, affects the emission of harmful compounds in the exhaust gas. Changes in harmful compound emission are frequently ambiguous, as they highly depend on parameters controlling the combustion process. An additional problem is that simple interactions are frequently accompanied with mutual influence of these parameters. Therefore, we can say about different sensitivity of diagnostic parameters to the same excitations coming from the engine structure but executed at different loading states. When the set of diagnostic parameters is numerous and the values of these parameters are similar, there is a real problem with their correct classification, frequently based on subjective assessment by the analyst. In the article, the authors propose a methodology to classify the recorded diagnostic parameters. In earlier works by the authors [4,6,7], the information capacity index method (the Hellwig method) was proposed as the measure of diagnostic parameter sensitivity. Based on this method, a rankling of diagnostic parameters can be created which divides the set of diagnostic variables into stimulators and destimulators. Novel authors’ approach to the presented problem consists in including nominants, i.e. variables with the most favourable value for the analysed aspect of the research, in the set of diagnostic variables. This normalisation of the set is believed to be helpful for making a diagnostic decision free from analyst’s arbitrariness. The zero unitarization method can also be helpful in creating diagnostic tests.
Źródło:
Polish Maritime Research; 2018, S 1; 234-242
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The identification of toxic compound emission sensitivity as a diagnostic parameter during dynamic processes of the marine engine
Autorzy:
Zadrąg, R.
Kniaziewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/2073657.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
diagnostic
theory of experiments
marine diesel engine
exhaust gas toxicity
multi-equation models
Opis:
Changing some parameters of the engine structure alters the emission of harmful components in the exhaust gas. This applies in particular to the damage of charge exchange system as well as fuel system and engine supercharger. These changes are much greater during the dynamic states and their accompanying transitional processes. The different sensitivity of diagnostic parameters to the same force, coming from the engine structure, but realized in other loading conditions can be discussed. Presented in the paper is a model of the engine diagnostic, in which symptoms are indicators of diagnostic and emission characteristics of gaseous exhaust components. For the purpose of the paper the parameters were taken as the dominant structure in the change of fuel injection timing. The diagnostic engine model, based on the theory of multi-equation models, was supplemented by the results of the tests on the single-cylinder research engine ZS. Also proposed is a measure of the sensitivity of the diagnostic parameter during dynamic processes. The following paper is building on the problem previously published by the authors in [X].
Źródło:
Journal of Polish CIMEEAC; 2015, 10, 1; 161--170
1231-3998
Pojawia się w:
Journal of Polish CIMEEAC
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Utilization of the zero unitarization method for the building of a ranking for diagnostic marine engine parameters
Autorzy:
Zadrąg, R.
Kniaziewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/133246.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
diagnostic
theory of experiments
marine diesel engine
exhaust gas toxicity
multi-equation models
diagnostyka
teoria eksperymentów
silnik okrętowy
toksyczność spalin
modele wielorównaniowe
Opis:
Changing some of the parameters of the engine structure affects the emission of harmful components in the exhaust gases. This primarily concerns damage in the cargo exchange system as well as in the fuel system and engine boost system. Changes in emissions of harmful compounds are often ambiguous, depending largely on the parameters that shape the combustion process. An additional problem is that often simple but undesired interactions occur with the interaction of these parameters. It is therefore possible to speak of different diagnostic parameters' sensitivity to the same extractions from the engine structure, but implemented in other load states. In cases where the set of parameters is numerous and the values of these parameters are similar, there is a real problem with their proper classification, often based on the discretion of the researcher. In the paper the authors propose a methodology for classification of acquired diagnostic parameters. In previous papers [4, 5], Hellwig's method of information capacity index was proposed as a measure of diagnostic parameter sensitivity. This method can be used to build a diagnostic parameter ranking that divides the set of diagnostic variables into stimulators, destimulators and nominators. This normalization of the set seems to be helpful in making a diagnostic decision not influenced by the discretion of the researcher. The zero unitary method can also be helpful in creating diagnostic tests.
Źródło:
Combustion Engines; 2017, 56, 4; 44-50
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model tests of a marine diesel engine powered by a fuel-alcohol mixture
Autorzy:
Zacharewicz, Marcin
Kniaziewicz, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2097626.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
model tests
diesel engine
model adequacy assessment
alternative fuels
diagnostics
badania modelowe
silnik Diesla
ocena adekwatności modelu
paliwa alternatywne
diagnostyka
Opis:
The paper presents the results of model and empirical tests conducted for a marine diesel engine fueled by a blend of n-butanol and diesel oil. The research were aimed at assessing the usefulness of the proprietary diesel engine model in conducting research on marine engines powered by alternative fuels to fossil fuels. The authors defined the measures of adequacy. On their basis, they assessed the adequacy of the mathematical model used. The analysis of the results of the conducted research showed that the developed mathematical model is sufficiently adequate. Therefore, both the mathematical model and the computer program based on it will be used in further work on supplying marine engines with mixtures of diesel oil and biocomponents.
Źródło:
Combustion Engines; 2022, 61, 2; 83--88
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on energetic processes in a marine diesel engine driving a synchronous generator for diagnostic puproses part 2 - mathemical model of the processes
Autorzy:
Zacharewicz, M.
Kniaziewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/2073646.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
energetic processes
marine diesel engine
mathematical model
procesy energetyczne
silnik wysokoprężny
model matematyczny
Opis:
The paper presents the formation steps to the mathematical model of the gas-dynamic processes occurring in the cylinders of the marine diesel engine driving a synchronous generator. All steps have been illustrated by charts of the modeled parameters as a function of the crankshaft angle. In addition, the paper presents the problem that occurs during modeling quasi-stationary dynamic processes.
Źródło:
Journal of Polish CIMEEAC; 2016, 11, 1; 199--209
1231-3998
Pojawia się w:
Journal of Polish CIMEEAC
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cycle-to-cycle variations of a diesel engine operating with palm biodiesel
Autorzy:
Yasin, M. H.
Mamat, R.
Abdullah, A. A.
Abdullah, N. R.
Wyszynski, M. L.
Powiązania:
https://bibliotekanauki.pl/articles/950092.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
cycle-to-cycle variations
biodiesel
combustion
diesel engine
Opis:
Biodiesel is one of biodegradable and renewable fuel, which is originated from vegetable oil or animal fats. Different fuel properties of biodiesel produce different combustion characteristics which slightly differ to mineral diesel. Combustion studies on palm-biodiesel and mineral diesel were conducted using a multi-cylinder diesel engine operating at medium engine load at 2500 rpm. The engine was water cooled inline four cylinder diesel engines without exhaust gas recirculation system. Cycle-to-cycle variations of peak cylinder pressure and mean indicated pressure of the test fuels were determined for the combustion characteristics of diesel engine. In-cylinder pressure data for the 200 consecutive cycles were determined using a Kistler pressure transducer and recorded into a combustion analyser. Three different engine loads: 20%, 40% and 60% were selected in this study with a constant engine speed of 2500 rpm. The results show that at lower load, in-cylinder pressure variations for palm biodiesel were lower compared to mineral diesel. However, at medium and high loads, palm biodiesel has dominated the peak cylinder variations. Different combustion cyclic variations for mineral diesel and B100 are observed and generally influenced by psychochemical properties differences including viscosity and density of fuel.
Źródło:
Journal of KONES; 2013, 20, 3; 443-450
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combustion and emissions investigation on low-speed two-stroke marine diesel engine with low sulfur diesel fuel
Autorzy:
Yang, Zhiyuan
Tan, Qinming
Geng, Peng
Powiązania:
https://bibliotekanauki.pl/articles/259117.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
NOx emission
CO2 emission
marine diesel engine
combustion
marine low sulfur diesel fuel
Opis:
With the implementation and expansion of international sulfur emission control areas, effectively promoted the marine low sulfur diesel fuel (MLSDF) used in marine diesel engines. In this study, a large low-speed, two-stroke, cross-head, common rail, electronic fuel injection marine diesel engine (B&W 6S35ME-B9) was used for the study. According to diesel engine’s propulsion characteristics, experiments were launched respectively at 25%, 50%, 75%, 100% load working conditions with marine low sulfur diesel fuel to analyze the fuel consumption, combustion characteristics and emissions (NOx, CO2 , CO, HC) characteristics. The results showed that: Marine diesel engine usually took fuel injection after top dead center to ensure their safety control NOx emission. From 25% to 75% load working condition, engine’s combustion timing gradually moved forward and the inflection points of pressure curve after top dead center also followed forward. While it is necessary to control pressure and reduce NOx emission by delaying fuel injection timing at 100% load. Engine’s in-cylinder pressure, temperature, and cumulative heat release were increased with load increasing. Engine’s CO2 and HC emissions were significantly reduced from 25% to 75% load, while they were increased slightly at 100% load. Moreover, the fuel consumption rate had a similar variation and the lowest was only 178 g/kW·h at 75% load of the test engine with MLSDF. HC or CO emissions at four tests’ working conditions were below 1.23 g/kW·h and the maximum difference was 0.2 or 0.4 g/kW·h respectively, which meant that combustion efficiency of the test engine with MLSDF is good. Although the proportion of NOx in exhaust gas increased with engine’s load increasing, but NOx emissions were always between 12.5 and 13.0 g/kW·h, which was less than 14.4 g/kW·h. Thus, the test engine had good emissions performance with MLSDF, which could meet current emission requirements of the International Maritime Organization.
Źródło:
Polish Maritime Research; 2019, 1; 153-161
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Karanja biodiesel blends on the characteristics of diesel engine
Autorzy:
Yadav, Sandeep
Kumar, Amit
Chaudhary, Abhilasha
Powiązania:
https://bibliotekanauki.pl/articles/2176951.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
Diesel engine
Karanja biodiesel
performance
combustion
emission
silnik Diesla
biodiesel Karanja
wydajność
spalanie
emisja
Opis:
Extensive research is being conducted to create and use a wide range of alternative fuels to accommodate the world's growing energy needs. The objective of this experimental investigation was to analyze the effects of Karanja biodiesel blends on the performance, combustion, and emission characteristics of a compression ignition (CI) engine vis-a-vis neat diesel. Important physical parameters of Karanja oil were examined experimentally after transesterification and determined to be within acceptable limits. BTE of Karanja biodiesel blends was about 3-8% lower than diesel. For Karanja biodiesel blends, BSFC was about 2-9% higher than diesel but exhaust gas temperature and volumetric efficiency were lower. Emissions characteristics such as nitrogen oxides, hydrocarbons, and carbon monoxide were also analyzed for various tested fuels. Karanja biodiesel blends resulted in lesser CO and HC formation. Nonetheless, NOx emissions were around 10% greater than diesel. Peak cylinder pressure, heat release rate, and maximum rate of pressure rise versus crank angle were among the combustion characteristics parameters considered in this study. Combustion analysis revealed that for Karanja biodiesel blends heat release rate and peak cylinder pressure were lower than for neat diesel. Findings indicate that Karanja biodiesel can be considered a viable diesel engine fuel.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2022, 115; 249--264
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of surface texture parameters on friction characteristics under starved lubrication
Autorzy:
Wu, Shen
Zhang, Pan
Wei, Haijun
Chen, Lei
Powiązania:
https://bibliotekanauki.pl/articles/259916.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
marine diesel engine
cylinder liner and piston ring
friction reduction
starved lubrication
laser texturing
Opis:
A cylinder liner and piston ring running under starved lubrication near the top dead centre (TDC) and bottom dead centre (BDC) cause abnormal friction and wear during operation of a marine diesel engine. The method of laser texturing is proposed to improve the surface friction property under this condition. Spherical crown pits with different parameters were formed on the surface of samples by femtosecond laser processing. The BDC and TDC conditions of oil starvation were simulated in a reciprocating friction and wear experiment, and a numerical model of Surface texture lubrication based on the Reynolds equation was established. The influence of the distribution density, diameter, and depth parameters of the texture on the surface properties was studied. In the BDC condition, compared with the untextured surface, the average coefficient of friction (COF) can be reduced by up to 24% and the average friction force can be reduced by up to 18%. In the TDC condition, the COF can be reduced by up to 19%, and the average friction force can be reduced by up to 18%. Therefore, the textures with various parameters should be arranged in different positions on the cylinder liner; more attention should be paid to the optimisation of diameter in the texture of the cylinder liner near the BDC, whereas more attention should be paid to the optimisation of distribution density in the texture of the cylinder liner near the TDC
Źródło:
Polish Maritime Research; 2020, 2; 96-106
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 397

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies