Autor: Forma, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of direct fuel injection in a small power two-stroke engine
Autorzy:: Mitianiec, W.
Forma, M.
Powiązania:: https://bibliotekanauki.pl/articles/242265.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
engine development
two-stroke engine
direct fuel
Opis:: Small power two-stroke engines can be competitive in regard of work parameters and pollutants emission in relation to four-stroke engines at some modifications, particularly changing of fuelling system. The paper presents a modifted air-assisted direct fuel injection in a two-stroke engine, which changes propagation of fuel jet in the combustion chamber. The main problem of mixture formation is short time for fuel evaporation after injection which should begin after closing of the exhaust port. The paper shows interaction between the scavenge air, additional air stream and fuel jet from the injector located in the cylinder head, which can induce the small size of fuel droplets and fast evaporation. The computational results of fuel mixture formation and combustion process in direct fuel injection two-stroke engine Robin EC-12 with capacity 115 cm3 are presented. The simulation was carried out by use KIVA code with assumption of initial parameters from the experimental tests on the carburetted engine. Setting of the injector in a regard of the cylinder head decides of fuel motion and evaporation in the combustion chamber. Air-assisted fuel injection influences on higher mixing of fuel and better combustion than by using DFI system. The paper shows phases of mixture formation, combustion and concentration of the combustion product in the cylinder with additional air stream. Spray guided high pressure direct injection system in SI two-stroke engine enables fulfil the restrictions of gas emission of one-wheeler vehicles and small power units.
Źródło:: Journal of KONES; 2009, 16, 2; 337-347
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Formation of fuel mixture in a SI two-stroke engine with direct fuel injection
Autorzy:: Mitianiec, W.
Forma, M.
Powiązania:: https://bibliotekanauki.pl/articles/243963.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
crank drive
Opis:: Decreasing of fuel consumption and high hydrocarbon emission in a SI two-stroke engine applied in motorcycles, scooters and small power units is possible by change of fuelling system on direct fuel injection. The main problem of mixture formation is short time for fuel evaporation after injection which should begin after closing of the exhaust port. However well interaction between the scavenge air and fuel jet from the injector located in the cylinder head can induce the small size of fuel droplets and fast evaporation. The paper presents the computational results of fuel mixture formation and combustion process in direct fuel injection two-stroke engine Robin EC-12 with capacity 115 cm3. The simulation was carried out by use KIVA code with assumption of initial parameters from the experiment of the carbureted engine. Earlier fuel injection influences on better evaporation and mixture formation with small stratification, which enables full mixture combustion. The paper shows phases of mixture formation, combustion and concentration of the combustion product in the cylinder. Spray guided high pressure direct injection system in SI two-stroke engine enables fulfill the restrictions of gas emission of one-wheeler vehicles and small power units. New modern two-stroke engines and environmental protection require new fuelling systems and one of the most promising methods is direct spray guided fuel injection. Many work were done in this subject, however still there is no better option for small power two-stroke engines.
Źródło:: Journal of KONES; 2008, 15, 2; 329-337
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Experimental investigations in direct injected SI two-stroke engine
Autorzy:: Mitianiec, W.
Forma, M.
Rodak, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/246360.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
combustion engines
direct fuel injection
Opis:: The paper presents the latest experimental results of smali power two-stroke engine with electronic controlled high pressure direct fuel injection. The work is one of the first solutions in such engines in Poland and was provided on industrial engine with capacity 115 cm3. A special experimental eąuipment and electronic control of fuel dose and injection phases enables to obtain a big decrease of specific fuel consumption and exhaust gas emission, particularly hydrocarbons with the same level of torque. Applying of direct injection in small power two-stroke engine gives possibility tofulfil exhaust emission reguirements. The paper presents the experimental stand and fuel injection system with results of main engine parameters and emission of chosen chemical components. The configuration of injection system was designed on the basis of previous simulation test in GT-Power and KIVA3V. Earlier fuel injection influences on better evaporation and mixture formation with small stratification, which enables full mixture combustion. Direct fuel injection in two-stroke engine decreases hydrocarbon emission 10 times and specific fuel consumption about 30% in comparison to carburetted engine. Exhaust gas emission is on level off our stroke engines with low emission of NOx. The engine was equipped with conventional automotive injector, which was not suited to small cylinder capacity. . On the basis of the simulations and experimental tests a main conclusion can be drawn, that the spray guided direct fuel injection is a way to obtain cleaner and more effective two-stroke engine for small power units.
Źródło:: Journal of KONES; 2010, 17, 2; 335-342
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: System szybkiej numerycznej analizy podatności wybranych układów aparatu Ilizarowa
System for fast numerical analysis of compliance in chosen configurations of the Ilizarov apparatus
Autorzy:: Bućko, S.
Forma, K.
Herdzina, M.
Powiązania:: https://bibliotekanauki.pl/articles/99303.pdf
Data publikacji:: 2009
Wydawca:: Politechnika Śląska. Katedra Biomechatroniki
Tematy:: ortopedia
aparat Ilizarowa
model obliczeniowy
program komputerowy
ANSYS
orthopedics
Ilizarov apparatus
calculation model
computer program
Opis:: W pracy przedstawiono nakładkę do programu ANSYS umożliwiającą prowadzenie szybkich obliczeń jak również optymalizację wybranych układów aparatu Ilizarowa. Praca przedstawia praktyczną realizację idei budowy pakietu obliczeniowego pozwalającego na szybki montaż modelu obliczeniowego układu aparatu Ilizarowa z zespołu przygotowanych, szeroko stosowanych elementów, bazując na dwóch pierścieniach. Aplikacja prowadzi użytkownika przy tworzeniu modelu obliczeniowego aparatu, pozwalając wybrać oczekiwaną opcję oraz zapewnia uzyskanie wyniku - podatności układu w czasie kilku sekund.
This paper treats about a cooperating with ANSYS application, which enables fast analysis and optimization of chosen configurations of Ilizarov apparatus. Idea of an engineering software providing fast modeling, using common elements and basing on two rings is presented. User is carried through designing a model, choosing options and in the end getting results - compliance of the chosen configuration of Ilizarov apparatus in just a few seconds.
Źródło:: Aktualne Problemy Biomechaniki; 2009, 3; 17-22
1898-763X
Pojawia się w:: Aktualne Problemy Biomechaniki
Dostawca treści:: Biblioteka Nauki

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