Wyniki wyszukiwania - BazTech

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Ammonia as a fuel for compression-ignition engines

Bednarski M., Sikora M., Lasocki J., Orliński P., Wojs M.

Zeszyty Naukowe Instytutu Pojazdów / Politechnika Warszawska

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2018

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z. 2/116

9--17

EN

In this article the potential of ammonia as a fuel for compression-ignition engines (CI) was assessed. The physicochemical properties of ammonia, its combustion characteristics and possible ways of implementing in a CI engine were presented. The research results published in the literature were analyzed. Exemplary dependencies regarding the influence of supplying the engine with ammonia-diesel oil mixture on the engine torque, fuel flow rate and the emission of selected pollutants were showed. Based on the considerations presented, it can be concluded that in the case of CI engine, ammonia can be treated as an alternative fuel in a dual-fuel system with another fuel, which has better auto-ignition properties.

PL

W niniejszym artykule dokonano oceny amoniaku jako potencjalnego paliwa do silników o zapłonie samoczynnym (ZS). Przedstawiono właściwości fizykochemiczne amoniaku, dokonano charakterystyki jego procesu spalania, i opisano możliwe sposoby doprowadzenia do silnika o ZS. Poddano analizie wyniki badań opublikowane w literaturze. Przedstawione zostały przykładowe zależności dotyczące wpływu zasilania silnika mieszanką amoniaku i oleju napędowego na moment obrotowy silnika, natężenie przepływu paliwa oraz emisję wybranych zanieczyszczeń. Na podstawie przedstawionych rozważań można wywnioskować, że w przypadku silnika o ZS amoniak może być traktowany jako paliwo alternatywne w układzie dwupaliwowym wraz z innym paliwem, które ma lepsze właściwości ze względu na samozapłon.

2

Determination of the total efficiency for engine with spark - ignition and compression - ignition

Cygnar M., Budzik G.

Journal of KONES

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2013

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Vol. 20, No. 1

41--48

EN

This paper presented of developing a power system for two fuel injection systems – spark ignition and compression ignition. Two ways to initiate combustion process were used: initially the spark ignition, and after it turns off - the combustion is initiated by the injection of ignition injected fuel. The composition of the ignition dose was developed through the research conducted in order to adjust the right proportions of chemical components to obtain the best parameters of the combustion process. The study considered the performance of the ignition dose injected into the engine cylinder and its evaporation process, the charge stratification, the formation of toxic emission and the total efficiency of the engine. Experimental studies were carried out on a test engine equipped with two injection systems and automatic mode change control management. The scope of research included: – determining the basic characteristics of the engine operation, taking into account the injection advance angle of the ignition dose, – comparative studies of engine performance and exhaust gas composition, working with spark ignition and initiated by compression ignition of the ignition dose, – determining the increase in the general efficiency of the two-circulation engine working with injection of ignition dose compared to conventional power system with the initiation of combustion process from the spark plug.

3

Misfire events detection in compression-ignition engines by the use of vibroacoustic diagnostics - application of OBD system requirements in non-road vehicles

Merkisz J., Waligórski M., Kozak M.

Silniki Spalinowe

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2007

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R. 46, nr SC3

307-318

EN

The paper concerns the assessment possibilities of using the chosen parameters of a vibration signal to detect misfire events in an internal combustion engine. The new method of the misfire detection which is based on the assessment of some vibration signal characteristics has been made and proved to be reliable and precise for the on-board diagnostic of the compression-ignition engine. The following methodological assumptions and stages of measurements and the vibration signals analysis have been presented. The measurements results of the basic research conducted at the engine test stand for a single cylinder research engine have been presented as a first. The authors research works which concerned the possibilities of application vibroacoustic methods in a combustion process assessment of a diesel locomotive engine at the exploitation conditions have been concerned in the paper as well.

4

Influence of fatty acid methyl esters' additive to diesel engine on ecology, fuel consumption and vehicle's performance

Chłopek Z., Jarczewski A., Bardziński W., Sar H.

Journal of KONES

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2006

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Vol. 13, No. 1

261-268

EN

The paper presents results of researching a vehicle equipped with diesel engine, fueled by diesel fuel with fatty acid methyl esters' additive. Research was conducted on chassis dynamometer in static conditions (load characteristics) and dynamic road test cycles according to 83 ECE Regulation. On the basis of results the characteristics of average pollutants' emission, fuel consumption and exhaust opacity as a function of fatty acid methyl esters' additive to diesel fuel were made. Characteristics of engine's power and torque as a function of acid methyl esters' additive were also made. Research showed that together with increasing share of esters in diesel oil to 100% with reference to clean diesel oil there was taken place by the decreasing level of HC emission of 28 %, CO emission decreasing of 21%, increasing NOx emission of 8%, the smokiness decreasing of exhaust gases of 57%. Measurement of the fuel consumption with the method of the carbon balance showed increasing of the fuel consumption with the increasing of FAME share in the mixture. Growth volumetric fuel consumption clean esters with relation to the clean diesel oil carried out of 16%. There also was observed the essential decreasing of the smokiness of exhaust gases with increasing of FAME share. At to supply of the engine clean esters there was observed decreasing of the maximum power of 5. 1% with relation to supply clean diesel oil For the fuel of 10 % FAME decreasing of the engine power carries out about 0, 5 %.

PL

Artykuł prezentuje badania pojazdu zaopatrzonego w silnik diesla, zasilany olejem napędowym z c estrów metylowych kwasu tluszczowego(FAME). Badania były prowadzone na hamowni warunkach statycznych (charakterystyka obciążeniowa) i dynamicznych cyklach testu drogowego s Przepisów 83 ECE. Na bazie wyników charakterystyka średnich wartości składników toksycznych zużycie paliwa i wyglądu spalin zostały opracowane charakterystyki mocy silnika i momentu obrotowego w funkcji dodatku estrów metylowych do oleju napędowego. Badania wykazały, że wraz ze wzrostem udziału estrów w oleju napędowym do 100% w odniesieniu do czystego oleju napędowego nastąpił spadek poziomu emisji HC o 28 %, spadek emisji CO o 21%, wzrosłe NOX o 8%, spadek zadymienia spalin o 57%. Pomiary zużycia paliwa metodą bilansu węgla wykazały ł zużycia paliwa ze wzrostem udziałów FAMĘ w mieszaninie. Wzrost objętościowego zużycia czystych estrów w stosunku do czystego oleju napędowego wyniósł ok. 16%. Zaobserwowano też istotne zmniejszenie; spalin ze wzrostem udziału FAME. Przy zasilaniu silnika czystymi estrami zaobserwowano spadek i maksymalnej o 5,1% w stosunku do zasilania czystym olejem napędowym, dla paliwa z 10% dodatkiem FAME spadek mocy silnika wynosi około 0,5 %.

5

Experimental study of compression and combustion processes in a combustion characteristics of compression ignition engine fuelled with RME and ethanol

Kowalewicz A.

Journal of KONES

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2005

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Vol. 12, No. 1-2

163-174

EN

At the previous conference KONES’2004 emission characteristics of C.I. engine fuelled with either rape oil methyl ester (RME) or diesel fuel (DF) as a main fuel and ethanol as additional fuel were presented. Comparison of emission and brake fuel conversion efficiency (BFCF) of the engine fuelled with both main fuels showed that fuelling with RME and ethanol is more advantageous on account of both emission and efficiency than with DF and ethanol. In this paper combustion characteristics of the engine fuelled with RME and ethanol are presented and analysed. They enabled the insight into combustion processes of RME and ethanol resulting in better understanding influence of ethanol fraction in total fuel on emission and efficiency.