Autor: Pukalskas, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The influence of diesel engines thermal condition on fuel consumption and smoke of exhaust gases
Autorzy:: Pukalskas, S.
Pikunas, A.
Bureika, G.
Powiązania:: https://bibliotekanauki.pl/articles/245614.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diesel engines fuel consumption
engine's thermal condition
temperature of engine's cooling liquid
smoke in exhaust
Opis:: The number of vehicles in the world is growing rapidly. Therefore, the global consumption of crude oil is increasing and its natural resources are being depleted. It causes the rise of oil fuel cost. Constantly rising energy prices and emironmental concerns have made energy saving the highest priority for transportation operators. The main goal of vehicles' operation is economy. The fuel consumption of the most popular internal combustion engines depends on various factors, and one of the most important of them is thermal condition. Energy or fuel saving is the main way to reduce operational expenses of vehicles. This paper aims to investigate fuel consumption of 1.9 liter volume direct injection diesel engine and to construct a diagram of the dependence of the amount of smoke in exhaust on the temperature of engine's operation. The temperature was fixed in the engine's crankcase, while the temperature of cooling liquid was measured at four points as well as during the engine's bench testing. Unexpected test results are obtained: when the temperature of exhaust gases rises above 70-75 °C, the amount of smoke increases by a few times. Finally, basic conclusions and recommendations are given.
Źródło:: Journal of KONES; 2009, 16, 3; 319-324
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Investigation of vehicle stability on road curves in winter conditions
Autorzy:: Kemzuraite, K.
Pukalskas, S.
Bureika, G.
Powiązania:: https://bibliotekanauki.pl/articles/247233.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: vehicle stability
vehicle dynamics
road curve
road surface adhesion coefficient
lateral acceleration
road traffic safety
Opis:: The paper reveals peculiarities of a vehicle movement/operation on road curves when the road surface is slippery and/or snowy, with asphalt ruts. The survey of scientific works related to the lateral acceleration and movement dynamics of a vehicle is presented. Field experiments with different vehicles were carried out in winter conditions. The acceleration value and stability parameters depending on the speed of a vehicle and adhesion coefficient on road curves are analysed. Dependence of the vehicle lateral acceleration on road curves with various adhesion surfaces are given in graphical charts. Recommendations how to improve road safety by limitation of the speed in winter conditions are formulated. Finally, basic conclusions are given. Handling the vehicle on the road with the compressed snow surface (on the curve of the radius of 120 m) is much more dangerous when the adhesion coefficient of the wheels and the road is low if compared to handling the vehicle along the dry ruts at the same speed. When the vehicle moves along the curve of 120 m radius at a speed of 70 km/h, and the road surface is snowy, the lateral acceleration of 3.1 m/s2 is reached. The paper indicates that lateral acceleration of 3.1 m/s2 can be reached while moving along the snowy road with dry ruts at a speed higher in 27% (90 km/h). For improving the vehicle safety, it is recommended to have road signs on sharp turns/curves (R less than 120 m) to decrease the vehicle speed in 20 km/h.
Źródło:: Journal of KONES; 2011, 18, 4; 191-197
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Investigation of combustion, performance and emission characteristics of spark ignition engine fuelled with buthanol – gasoline mixture and a hydrogen enriched air
Autorzy:: Rimkus, A.
Melaika, M.
Matijošius, J.
Mikaliūnas, Š.
Pukalskas, S.
Powiązania:: https://bibliotekanauki.pl/articles/103144.pdf
Data publikacji:: 2016
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: buthanol
hydrogen
spark timing
simulation
Opis:: In this study, spark ignition engine fuelled with buthanol-gasoline mixture and a hydrogen-enriched air was investigated. Engine performance, emissions and combustion characteristics were investigated with different buthanol (10% and 20% by volume) gasoline mixtures and additionally supplied oxygen and hydrogen (HHO) gas mixture (3.6 l/min) in the sucked air. Hydrogen, which is in the HHO gas, improves gasoline and gasoline-buthanol mixture combustion, increases indicated pressure during combustion phase and decreases effective specific fuel consumption. Buthanol addition decreases the rate of heat release, the combustion temperature and pressure are lower which have an influence on lower nitrous oxide (NOx) emission in exhaust gases. Buthanol lowers hydrocarbon (HC) formation, but it increases carbon monoxide (CO) concentration and fuel consumption. Combustion process analysis was carried out using AVL BOOST software. Experimental research and combustion process numerical simulation showed that using balanced buthanol and hydrogen addition, optimal efficient and ecological parameters could be achieved when engine is working with optimal spark timing, as it would work on gasoline fuel.
Źródło:: Advances in Science and Technology. Research Journal; 2016, 10, 31; 102-108
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Combustion of RME – diesel and NExBTL – diesel blends with hydrogen in the compression ignition engine
Autorzy:: Juknelevičius, R.
Szwaja, S.
Pyrc, M.
Gruca, M.
Pukalskas, S.
Powiązania:: https://bibliotekanauki.pl/articles/247823.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: hydrogen
RME
HVO
NExBTL
PRO Diesel
diesel fuel
CI engine
combustion
emission
Opis:: The article presents the test results of the single cylinder compression ignition engine with common rail injection system operating on biofuels and conventional diesel blends with hydrogen. Two types of liquid fuels were tested: blend of the 7% Rapeseed Methyl Ester (RME) with conventional diesel fuel and Neste Pro Diesel – blend of the 15% Hydrotreated Vegetable Oil (HVO), produced by Neste Oil Corporation with conventional diesel fuel. The purpose of this investigation was to examine the influence of the hydrogen addition to biofuels and diesel blends on combustion phases, autoignition delay, engine performance efficiency and exhaust emissions. Hydrogen fraction was changed within the range from 0 to 43% by energy. Hydrogen was injected into the intake manifold, where it created homogeneous mixture with air. Tests were performed at both fixed and optimal injection timings at low, medium, and nominal engine load. After analysis of the engine bench tests and simulation with AVL BOOST software, it was observed that increasing hydrogen fraction shortened the fuel ignition delay phase and it affected the main combustion phase. Moreover, decrease of carbon monoxide (CO), carbon dioxide (CO2) and smoke opacity was observed with increase of hydrogen amounts to the engine. However, increase of the nitrogen oxide (NOx) concentration in the engine exhaust gases was observed.
Źródło:: Journal of KONES; 2018, 25, 3; 261-274
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Evaluating combustion, performance and emission characteristics of CI engine operating on diesel fuel enriched with HHO gas
Autorzy:: Rimkus, A.
Pukalskas, S.
Juknelevičius, R.
Matijošius, J.
Kriaučiūnas, D.
Powiązania:: https://bibliotekanauki.pl/articles/245953.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: CI engine
HHO gas
engine efficiency
emission
Opis:: Research of efficient and ecological parameters was carried out with compression ignition (CI) engine using diesel fuel and additionally supplied hydrogen and oxygen (HHO) gas mixture. HHO gas is produced by electrolysis when the water was dissociating. At constant engine‘s brake torque and with increasing HHO gas volumetric concentration in taken air up to 0.2%, engine efficient indicators varies marginally, however, with bigger HHO concentration these parameters becomes worse. HHO increases smokiness, but it decreases NOx concentration in exhaust gas. Numerical analysis of combustion process using AVL BOOST software lets to conclude that hydrogen, which is found in HHO gas, ignites faster than diesel fuel and air mixture. Hydrogen combustion before TDC makes a negative work and it changes diesel fuel combustion process – diesel ignition delay phase becomes shorter, kinetic (premixed) combustion phase intensity gets smaller.
Źródło:: Journal of KONES; 2018, 25, 2; 303-311
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Investigation of the influence of hydrogen used in internal combustion engines on exhaust emission
Badanie wpływu wodoru stosowanego w silnikach spalinowych na emisję spalin
Autorzy:: Keršys, A.
Kalisinskas, D.
Pukalskas, S.
Vilkauskas, A.
Keršys, R.
Makaras, R.
Powiązania:: https://bibliotekanauki.pl/articles/301535.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:: hydrogen
fuel
exhaust gas
energetic
wodór
paliwo
spaliny
energetyczny
Opis:: This article deals with the possibility to use hydrogen in gasoline and diesel engines. Hydrogen production in a vehicle and hydrogen generators mounted in a vehicle are overviewed. Under operation of the hydrogen generator electrical current changes with temperature, to stabilize current the current pulse generator is used. Modifications of an intake manifold were made in order to supply hydrogen to an engine. For this purpose a special universal plate to evenly mix the hydrogen with fuel mix was made designed. The experimental and rig tests were performed. The rig tests were carried out at constant 2200 rpm. It was found that smokiness, in both cases decreases with an additional deployment of hydrogen. Other indicators of the exhaust gas using the hydrogen in case of the rig tests are worse. A possible cause of negative influence is an excessive amount of hydrogen, which releases at 25 A current.
Przedstawiony artykuł dotyczy możliwości wykorzystania wodoru w silnikach benzynowych i wysokoprężnych. Omówiono wytwarzanie wodoru w pojeździe oraz w generatorach wodoru zamontowanych w pojeździe.W trakcie funkcjonowania generatorawodoru prąd elektryczny zmienia się wraz z temperaturą; w celu stabilizacji prądu stosuje się generator impulsów prądowych. Aby dostarczyć wodór do silnika dokonano modyfikacji kolektora dolotowego. Do tego celu zaprojektowano specjalną uniwersalną płytę do równomiernego mieszania wodoru z mieszanką paliwową.Przeprowadzono próby eksperymentalne i próby na stanowisku badawczym. Próby na stanowisku badawczym prowadzono przy stałej prędkości obrotowej 2200 rpm. Stwierdzono, że zadymienie w obu przypadkach zmniejsza się wraz z dodatkowym wykorzystaniem wodoru. Inne wskaźniki spalin przy wykorzystaniu wodoru w przypadku badań na stanowisku badawczym wypadają mniej korzystnie. Możliwą przyczyną tego negatywnego oddziaływania jest nadmierna ilość wodoru, który uwalnia się w obecności prądu o wartości 25 A.
Źródło:: Eksploatacja i Niezawodność; 2013, 15, 4; 384-389
1507-2711
Pojawia się w:: Eksploatacja i Niezawodność
Dostawca treści:: Biblioteka Nauki

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