Temat: internal combustion - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Anomalies in combustion of hydrogen in a SI engine modified to work as a supercharged one
Autorzy:: Szwaja, S.
Cupiał, K.
Grab-Rogaliński, K.,
Powiązania:: https://bibliotekanauki.pl/articles/246823.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion
hydrogen
internal combustion engine
supercharging
Opis:: The paper describes combustion anomalies of various types randomly or permanently occurring while hydrogen is burnt in a supercharged spark ignited reciprocating engine. The anomalies were mainly identified as result of combustion pressure data analysis. Originally, the engine was a compression ignition one fuelled with diesel fuel. Modifications done on the engine dealt with decrease in its geometric compression ratio and equipping it with a spark plug located in diesel fuel injector position. The anomalies presented in the paper are typically associated with several abnormal phenomena as follows: flame propagation into intake manifold called back-fire, hydrogen spontaneous ignition by hot surface, flame propagation during valves overlap and extinguishing spark discharge flame kernel by high turbulence around a spark plug. These anomalies were observed in the supercharged engine, however, some of them were also detected while the engine was operated as a freely aspirated one. As investigated, some of these malfunctions would have been removed by change in engine operating parameters. Others need major changes in both exhaust pipeline geometry, hydrogen injection system, engine cylinder geometry and valve timing.
Źródło:: Journal of KONES; 2012, 19, 3; 437-442
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Statistical approach to characterize combustion knock in the hydrogen fuelled SI engine
Autorzy:: Naber, J. D
Szwaja, S.
Powiązania:: https://bibliotekanauki.pl/articles/246456.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: internal combustion engines
combustion knock
hydrogen
statistical distribution
Opis:: Combustion knock in a hydrogen fuelled engine has many different characteristic as compared to knock occurring in the gasoline engine. This is a result of differences in the gasoline and hydrogen combustion mechanisms which lead to knock. Hydrogen as the engine fuel is able to produce combustion knock of significant intensity. This intensity can be determined by measurements, which have been successfully applied for examining knock generated by the gasoline fuelled engine. This paper describes the engine test bed, in-cylinder pressure traces and methods for determining knock intensity. Further, the statistical approach for characterizing combustion knock is also presented. It concentrates on applications of several probability distributions for expressing individual knock intensity metrics of hydrogen port fuelled spark ignited engine. It is assumed that knock metrics for engine working cycles are considered as random variables. The knock metrics are based on the fluctuation component of the in-cylinder pressure traces sampled at 100 khz and are calculated for 300 consecutive engine working cycles. It was noticed that the knock metrics distribution profile changes as the knock intensity varies from light to heavy knock. In the paper, modelling of this knock distribution profile using several known stochastic distributions is also presented. Finally, usefulness of statistical distributions for characterizing combustion knock is shown.
Źródło:: Journal of KONES; 2007, 14, 3; 443-450
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Exhaust gas recirculation strategy in the hydrogen SI engine
Autorzy:: Szwaja, S.
Naber, J. D.
Powiązania:: https://bibliotekanauki.pl/articles/243087.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: internal combustion engine
hydrogen
exhaust gas recirculation (EGR)
Opis:: It is known that Exhaust Gas Recirculation (EGR) can be successfully applied not only for reducing NOx content in exhaust gases but also for reduction of combustion knock in SI engines. From this point of view, EGR can be particularly effective for knock elimination in the hydrogen reciprocating engine. Additionally with the application of EGR, the H2-air combustion can be maintained at the stoichiometric ratio enabling highly efficient NOx reduction in catalytic converters. In this paper a strategy of estimating EGR for the naturally aspirated, hydrogen fuelled engine is explained. On the basis of this strategy, the closed loop control system of the EGR was built and was implemented for the single cylinder CFR engine. There is also an outline of the test bed and several examples of in-cylinder pressure courses recorded under various EGR percentages. Next, the impact of EGR on combustion knock in the hydrogen fuelled engine is presented. Finally, conclusions concerning EGR application for hydrogen combustion in the IC engine are presented. EGR calculation and control scheme, main diagram of EGR calculation, subroutine (Sub-block) for calculating the molecular weight of EGR gases, in-cylinder pressure traces for several EGR levels during hydrogen combustion in the CFR engine, the fluctuating component of in-cylinder pressure during hydrogen combustion with several levels of EGR, peak pressure of fluctuation component of in-cylinder pressure vs. EGR percentage are presented in the paper.
Źródło:: Journal of KONES; 2007, 14, 2; 457-464
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Thermodynamic analysis of combustion events in the natural gas fuelled SI engine with VVT
Autorzy:: Szwaja, M.
Mazuro, P.
Szwaja, S.
Powiązania:: https://bibliotekanauki.pl/articles/242837.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: internal combustion engine
variable valve timing
heat release rate
IMEP
combustion phases
Opis:: The main aim of the research was to investigate influence of overlap of the natural gas fuelled spark ignited engine on the following parameters: Indicated Mean Effective Pressure (IMEP), heat rate release including combustion phases (ignition lag, main combustion phase). The content of the study includes results from processing in-cylinder pressure measurements, heat release rate analysis, combustion phases, and finally the conclusions. The tests were carried out on the test bed including the single cylinder research engine with a displacement volume of 550 cm3. The engine was equipped with independent cam phasors for both intake and exhaust valves, but for this investigation, the exhaust valve timing was fixed (the exhaust cam centre line was fixed at -95 crank angle (CA) deg before Top Dead Centre) and intake valve timing was changed (the intake cam centre line was varied from 90 to 150 CA deg after Top Dead Centre). The overlap was changed in the range from 85 to 25 CA deg. 8 tests series were performed, each singular series consisted of 300 consecutive engine combustion cycles. As observed, by varying the valve overlap it contributes to significant change in the peak combustion pressure, peak of heat release rate, and combustion phases. Summing up, variable valve timing affects compression and expansion strokes by changing polytropic indexes due to various amounts of exhaust residuals trapped in the cylinder. It affects not only engine volumetric efficiency but also the heat release rate and IMEP, so it does engine performance. Thus, variable valve timing can be considered as valuable tool that can be applied to the natural gas fuelled internal combustion engine.
Źródło:: Journal of KONES; 2018, 25, 4; 421-427
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Dual-fuel hydrogen-diesel compression ignition engine
Dwupaliwowy silnik wysokoprężny zasilany olejem napędowym i wodorem
Autorzy:: Borecki, R.
Szwaja, S.
Pyrc, M.
Powiązania:: https://bibliotekanauki.pl/articles/241801.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: dwupaliwowy silnik spalinowy
olej napędowy
wodór
internal combustion engine
dual fuel
diesel
hydrogen
Opis:: Od wielu lat w ośrodkach naukowych na całym świecie prowadzone są badania nad zasilaniem wodorem silników pojazdów mechanicznych. Prowadzone są także próby spalania wodoru w silniku dwupaliwowym zasilanym dodatkowo olejem napędowym. W Instytucie Maszyn Tłokowych i Techniki Sterowania Politechniki Częstochowskiej zbudowano stanowisko badawcze umożliwiające spalanie wodoru w silniku wysokoprężnym, który był dodatkowo zasilany olejem napędowym wtryskiwanym bezpośrednio do cylindra. Natomiast wodór doprowadzany był do silnika poprzez układ wtryskowy zamontowany na kolektorze dolotowym lub poprzez mieszalnik. Stanowisko zbudowano na bazie silnika wysokoprężnego firmy DEUTZ typ FL511 napędzającego prądnicę synchroniczną o mocy 20 kVA. W artykule przedstawiono przykładowe wyniki eksperymentalne badań silnika zasilanego dwupaliwowo olejem napędowym i wodorem o proporcji 50/50% pod względem udziału energetycznego oraz silnika zasilanego wyłącznie wodorem, którego zapłon inicjowany był samoczynnie. Wyniki badań przedstawiają przebiegi ciśnienia w cylindrze, składową zmienną tego ciśnienia, rozkłady statystyczne położenia 10, 50 i 90% spalonego ładunku (MFB) oraz charakterystykę spalania stukowego.
Investigation on a hydrogen fuelled engine has been conducted all over the world for several years. Hydrogen-diesel bi- fuelling application to a compression ignition (CI) engine is also of the interest. A test bed, which provides opportunities for both hydrogen combustion and diesel-hydrogen co-combustion research in the CI engine, has been built in the Institute of Internal Combustion Engines and Control Engineering of Czestochowa University of Technology. A classic direct injection system has been applied for fuelling the engine. Hydrogen can be delivered to the engine combustion chamber in two different ways: by a port fixed hydrogen injector or by a mixer, installed in the inlet manifold just pass the injector. Main parts of the test bed are as follows: 2 in-line air-cooled compression ignition (CI) engine FL511 made by Deutz and a synchronous generator of power output of 20 kVA. Tests were carried out for the hydrogen fuelled engine. Hydrogen was self-ignited due to high compression ratio of the engine. Additionally, there were tests of combustion of hydrogen, ignited by a diesel dose directly injected into the cylinder under proportion of 50/50% concerning energy share of the ach fuel. The research, presented in the paper, contains results of in-cylinder pressure analysis with respect to combustion knock intensity and mass fraction burnt (MFB) location against crank angle. There is also comparison made between these two tests and the test conducted for an original diesel engine.
Źródło:: Journal of KONES; 2008, 15, 4; 49-56
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Simplified calculation of combustion progress in the IC engine
Uproszczona metoda obliczania postepu spalania w silniku o spalaniu wewnetrznym
Autorzy:: Szwaja, S.
Powiązania:: https://bibliotekanauki.pl/articles/792330.pdf
Data publikacji:: 2011
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: combustion engine
heat release rate
mass fraction burnst
energy conservation law
crank angle
internal combustion engine
equation
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

Zmień widok

na półce

Informacja

Wyszukujesz frazę "internal combustion" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język