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1

The Impact of Rapeseed Oil Methyl Esters on Fuel Injection Parameters in a Diesel Engine Equipped with the Common Rail Injection System

Lotko Wincenty

Advances in Science and Technology. Research Journal

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2021

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Vol. 15, no 3

76--87

EN

In the global fuel economy, new challenges concerning the use of alternative (vegetable) fuels in the internal combustion engines are starting to arise. The important issue is to meet the new limits on four main pollutant emissions from a diesel engines: CO (carbon monoxide), NOx (nitrogen oxides), HC (hydrocarbons) and PM (particulate matter). The design of a modern engine must be characterized by high efficiency, its dynamics of movement and durability. Dynamic development of plant fuels is forced by the new strategy of the global fight against the global warming. For these reasons, it is necessary to do research concerning the effects of the use of biofuels, including methyl esters, higher fatty acids of rapeseed oil for self- ignition engines. The current tests must concern the engines equipped with the latest Common Rail fuel injection systems. In the publication, the above-mentioned issues have been analyzed, and the results of tests of the basic injection process parameters have been presented. The AVL5402 engine was fueled with mixtures of diesel oil with RME ester of rapeseed oil produced by ORLEN Południe S.A. in Trzebinia. The impact of the fuel (v/v) RME content in the mixture with diesel oil on the injection process parameters such as: initial velocity of the injected fuel, critical speed of secondary fuel breakup, critical droplet diameter, microstructure of the fuel stream, droplet Sauter mean diameter, vertical angle of the fuel stream, have been justified. The impact of the fuel (v/v) RME content in the mixture with diesel oil on the above-mentioned parameters has been proved. During the tests, the engine worked on the load characteristics.

2

Evaluation of the Influence of Car Engine Power Supply With Rapeseed Oil Esters on Emission of Pollutants in Dynamic Conditions

Chłopek Z., Grzelak P., Zakrzewska D.

Machine Dynamics Research

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2018

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Vol. 42, No. 1

55--71

EN

The paper presents the test results of pollutant emissions from the compression ignition engine in dynamic driving test conditions: the New European Driving Cycle type approval test (NEDC) and the Stop and Go special test for vehicle traffic congestion simulation and Autobahn test simulating traffic on motorways and expressways. The engine was fuelled with test fuels of different compositions of primary fuels: diesel fuel and RME fuel treated as diesel fuel. The dependence of the road emission of pollutants on the fuel content of RME in test fuels was presented. The sensitivity of the pollutant emissions to the RME fuel content in test fuels and the uniqueness of the sensitivity coefficient were investigated. It has been found that the RME fuel additive is conducive to the reduction of carbon monoxide, hydrocarbons and, especially, particulate matter road emissions and the increase of nitrogen oxides and carbon dioxide road emissions. The strongest sensitivity of the pollutant emissions to the RME fuel content in the test fuel, as well as the uniqueness of the sensitivity coefficient, is in the traffic conditions of vehicles with high engine dynamics and low load, i.e. in the Stop and Go test. The most sensitive to RME fuel content in the test fuel is the particulate matter emission, the least – carbon dioxide.

3

The toxicity of combustion gas from the Fiat 1.3 MultiJet engine operating following the load characteristics and fed with rape oil esters

Ambrozik A., Kurczyński D., Łagowski P., Warianek M.

Zeszyty Naukowe Instytutu Pojazdów / Politechnika Warszawska

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2016

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z. 1/105

23--35

EN

The toxic components of the exhaust gas pose a major problem related to internal combustion piston engines. The requirements that those engines have to meet concern the reduction in emissions of the exhaust gas harmful compounds. The paper presents selected results of experimental investigations into the Fiat 1.3 Multijet engine equipped with the Common Rail fuel system. The engine was fuelled by diesel oil and rapeseed oil methyl esters. The tests were carried out on the test bench at the Laboratory of Heat Engines of the Kielce University of Technology. In the tests, the engine operated under load conditions. The investigations included the measurements of the concentrations of the gaseous components of the exhaust and of the particulate matter. The impact of rapeseed oil methyl esters on the emission of toxic components of the exhaust gas was shown.

PL

Toksyczne składniki spalin stanowią podstawowy problem tłokowych silników spalinowych. Wymagania jakie są im stawiane dotyczą przede wszystkim ograniczenia emisji związków szkodliwych ze spalinami silników. W artykule przedstawiono wybrane wyniki badań eksperymentalnych silnika Fiat 1.3 Multijet wyposażonego w układ zasilania Common Rail zasilanego olejem napędowym i estrami metylowymi oleju rzepakowego. Badania przeprowadzono na hamowni silnikowej w Laboratorium Silników Cieplnych Politechniki Świętokrzyskiej. Podczas badań silnik pracował według charakterystyk obciążeniowych. W ramach badań dokonywano pomiarów stężenia gazowych składników spalin i cząstek stałych. Wykazano wpływ estrów metylowych oleju rzepakowego na emisją toksycznych składników spalin.

4

Badania mikroskopowe krystalizacji paliw konwencjonalnych i biopaliw podczas chłodzenia

Baczewski K., Szczawiński P.

Aparatura Badawcza i Dydaktyczna

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2014

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T. 19, nr 3

227-235

PL

Przedstawiono wyniki badań mikroskopowych procesu krystalizacji bazowego oleju napędowego (HON) oraz estru metylowego oleju rzepakowego (RME), obu czystych i z dodatkiem depresatora podczas chłodzenia. Opisano proces krystalizacji i morfologię kryształów. Wykazano, że krystalizacja HON i RME, zarówno czystych, jak i z dodatkiem depresatora, przebiega odmiennie. Podczas krystalizacji HON powstaje więcej kryształów w kształcie płytek, a RME - więcej kryształów w kształcie igieł. Proces krystalizacji determinuje zmianę właściwości reologicznych badanych paliw. Depresator modyfikuje przebieg procesu krystalizacji odmiennie dla HON i RME.

EN

Document contains the microscopic investigations results of crystallization process of base diesel oil (HON), rapeseed oil methyl ester (RME) both pure and with the addition of depressant during cooling. In addition a process of the crystallization and the crystals morphology were described. It has been shown that crystallization HON and RME, either pure or with the depressant addition proceeds differently. HON formed during the crystallization more platelet-shaped crystals and RME - more needle- shaped crystals. The crystallization process determines change in rheological properties of tested fuels. Depressant modifies the crystallization process differently for HON and RME.

5

Badania właściwości reologicznych mieszanin estrów metylowych oleju rzepakowego z paliwem lotniczym Jet A-1

Baczewski K., Seroka M., Szczawiński P.

Aparatura Badawcza i Dydaktyczna

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2013

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T. 18, nr 4

285-290

PL

Przedstawiono wyniki badań lepkości kinematycznej, temperatury mętnienia, temperatury zablokowania zimnego filtru, lepkości dynamicznej i naprężeń ścinających w funkcji składu mieszanin estrów metylowych oleju rzepakowego (RME) i paliwa lotniczego Jet A-1. Wykazano, że domieszka paliwa Jet A-1 w ilości do 20% objętości istotnie poprawia właściwości reologiczne RME. Podane równania empiryczne mogą służyć do prognozowania właściwości reologicznych mieszanin o różnej zawartości Jet A-1 i RME.

EN

The results of investigations of kinematic viscosity, cloud point, cold filter plugging point, dynamic viscosity and shear stress as function of blends composition of rapeseed oil methyl esters (RME) and aviation turbine fuel Jet A-1. It was showed that blending aviation fuel Jet A-1 at rate up to 20% volume significantly improves the rheological properties of RME. The obtained empirical equations can be used to predict the rheological properties of the blends RME and Jet A-1 at any composition.

6

Comparative study of selected lubricating properties of biofuels

Gardyński L., Kałdonek J.

Advances in Science and Technology. Research Journal

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2013

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Vol. 7, nr 20

75--79

EN

The paper presents the research results of lubricity of selected vegetable oils, rapeseed oil methyl esters, and esters with addition of oleic acid. Higher wear of samples during lubrication by rapeseed oil methyl esters in comparison to the tested vegetable oils was obtained. The addition of oleic acid to esters resulted in the improvement of their lubricating properties.

7

Properties of the rapeseed oil methyl esters and comparing them with the diesel oil properties

Gis W., Żółtowski A., Bocheńska A.

Journal of KONES

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2011

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Vol. 18, No. 4

121-127

EN

The paper presents theoretical analysis of the properties of the rapeseed oil methyl esters and comparing them with the diesel oil properties. The essential differences in the physic-chemical properties have been emphasised, such as: Cetane number, viscosity, density, fraction content, calorific value and temperature properties of the rapeseed oil methyl esters in respect to the diesel oil. The influence of individual properties of fuels on the combustion needs to be comprehensively approached, taking into account mutual relationships between individual characteristics of diesel oil. The numbers of the basic fuel properties depend on the fractional content, such as: viscosity, density, Cetane number or surface tension influencing the course of the physic-chemical processes taking place in the self ignition engine and the combustion. The influence of many fuel properties on the combustion process is sometimes contradictory. The range of the fuel's influence on the combustion depends also on the thermodynamic parameters of the engine. The new and current problem concerning the fuels for the self ignition engines is an introduction into the operation of the rapeseed oil esters and their mixtures with the Diesel oil are an object of the paper. The question, how will the vegetable oils affect the combustion process, remains open.

8

System pomiarowy do wyznaczania zawartości estrów metylowych oleju rzepakowego w oleju napędowym

Gołębiowski J., Prohuń T.

Przegląd Elektrotechniczny

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2006

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R. 82, nr 3

76-79

PL

W wielu krajach jako paliwo do silników wysokoprężnych stosuje się olej napędowy z dodatkami w postaci biokomponentów. W Europie biokomponenty występują najczęściej w postaci estrów metylowych oleju rzepakowego RME (Rapeseed oil Methyl Ester). Do określenia zawartości estrów metylowych RME zastosowano metodę spektrofotometrii w podczerwieni. Zaproponowano system pomiarowy do określania zawartości RME w oleju napędowym. W pracy zamieszczono wyniki pomiarów, przeprowadzono ich analizę oraz porównano z wynikami przeprowadzonymi za pomocą spektrofotometru.

EN

In most countries, for compression-ignition engines, diesel fuel is used, with bio-components as additives. In Europe, bio-components usually exist as rapeseed oil methyl esters RME. To measure the amount of methyl esters, infrared's spectrophotometric analysis were used. The RME amount in diesel oil estimation measurement system was presented. In the article, measurements' results as well as their analysis and comparison with results of measurement by means of spectrophotometer, were also presented.

9

Some problems using of vegetable fuels in diesel engines

Ambrozik A., Jankowski A., Slezak M.

Journal of KONES

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2006

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Vol. 13, No. 4

487-496

EN

Experimental results of the four-stroke CI direct injection engine fed with vegetable fuel - methyl esters of the rapeseed oil in aspect pressure course and heat release are presented in the paper. Aim realized researches was estimation of the influence feed of the CI engine a vegetable fuel on performance of the CI engine mainly in an aspect of the heat release. This influence estimated on the basis of engine research on dynamometer test bench with additional high-frequency measurement of the pressure in the combustion chamber and the feed system and lift of nozzle needle. In estimation works there were performed: the analysis change route of increasing of the pressure in the injection pipeline of the engine feed system and as result of appointment of relative characteristics of the heat release quantity during combustion process. This analysis realized basing on average values of 100 engine work cycles received from experimental measurement on engine dynamometer test bench. Characteristics of the relative heat release quantity during combustion process were appointed basing on the analysis of 100 engine work cycles received from experimental indicator diagrams. Indicator diagrams were obtained at work of the engine according to the external speed engine characteristics. The analysis of indicator diagrams of the engine oriented on to calculating characteristics of the heat release was realized at the regard of the change composition and the working charge quantity of kilo mole during combustion process and at neglect of losses of heat caused with the dissociation combustion products. The quantity heat exchanged between the working charge and walls combustion chamber was appointed basing on the empirical dependence for coefficient proposed by Woschni. Test results indicate the two-phase- course of combustion process. The speed of the heat release concerning combustion of vegetable fuel is greater comparatively for this speed concerning the diesel oil. Initial values of speed jet of injected fuel, the drop break-up terms and the spray ranges were comparable for both fuels. These proprieties have an essential influence on performances of the engine.