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Wyświetlanie 1-15 z 38
Tytuł:
Termodinamicheskaja vozmozhnost povyshenija ehffektivnocti DVS
Thermodynamics possibility of increase of efficiency of combustion engines
Autorzy:
Podznoev, G.
Abdulgazic, U.
Zharik, T.
Powiązania:
https://bibliotekanauki.pl/articles/77937.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
diesel engine
thermodynamics
combustion engine
exhaust gas
kinetics
pollutant emission
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 1
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of fuel dose division on the emission of toxic components in the car Diesel engine exhaust gas
Autorzy:
Pietras, D.
Powiązania:
https://bibliotekanauki.pl/articles/259658.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
exhaust opacity
exhaust emissions
diesel engine
common rail
fuel dose division
Opis:
The article discusses the effect of fuel dose division in the Diesel engine on smoke opacity and composition of the emitted exhaust gas. The research activities reported in the article include experimental examination of a small Diesel engine with Common Rail type supply system. The tests were performed on the engine test bed equipped with an automatic data acquisition system which recorded all basic operating and control parameters of the engine, and smoke opacity and composition of the exhaust gas. The parameters measured during the engine tests also included the indicated pressure and the acoustic pressure. The tests were performed following the pre-established procedure in which 9 engine operation points were defined for three rotational speeds: 1500, 2500 and 3500 rpm, and three load levels: 25, 40 and 75 Nm. At each point, the measurements were performed for 7 different forms of fuel dose injection, which were: the undivided dose, the dose divided into two or three parts, and three different injection advance angles for the undivided dose and that divided into two parts. The discussion of the obtained results includes graphical presentation of contests of hydrocarbons, carbon oxide, and nitrogen oxides in the exhaust gas, and its smoke opacity. The presented analyses referred to two selected cases, out of nine examined engine operation points. In these cases the fuel dose was divided into three parts and injected at the factory set control parameters. The examination has revealed a significant effect of fuel dose division on the engine efficiency, and on the smoke opacity and composition of the exhaust gas, in particular the content of nitrogen oxides. Within the range of low loads and rotational speeds, dividing the fuel dose into three parts clearly improves the overall engine efficiency and significantly decreases the concentration of nitrogen oxides in the exhaust gas. Moreover, it slightly decreases the contents of hydrocarbons and carbon oxide. In the experiment the contents of nitrogen oxides markedly increased with the increasing injection advance angle for the undivided dose and that divided into two parts. This, in turn, led to the decrease of the contents of hydrocarbons and carbon oxide. Fuel dose division into two and three parts leads to the increase of smoke opacity of the exhaust gas, compared to the undivided dose.
Źródło:
Polish Maritime Research; 2016, 3; 58-63
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stężenie i rozkład wymiarowy cząstek spalin silników Diesla w powietrzu w garażu
Concentration and size distribution of Diesel fume particles in garage air
Autorzy:
Jankowska, E.
Pośniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/179374.pdf
Data publikacji:
2010
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
silnik Diesla
spaliny
diesel engine
exhaust gases
Opis:
W artykule przedstawiono wyniki badania stężeń i rozkładu wymiarowego cząstek spalin silników Diesla w powietrzu w trzech przypadkach powszechnie występujących podczas prac wykonywanych w garażu. Podano również wyniki badania stężenia masowego w odniesieniu do frakcji wymiarowych cząstek PM10, PM2,5, PM1, PM0,5 i PM0,25. Badania wykazały, że spaliny z silników Diesla zawierają przede wszystkim cząstki drobne: 95-99% cząstek poniżej 2,5 µm; 91-98% poniżej 1 µm; 87-96% poniżej 0,5 µm i 66-77% cząstek poniżej 0,25 µm.
This article presents the results of an investigation of the concentrations and size distribution of particles of Diesel fumes suspended in the air in three cases common during work done in a garage. The article also presents the results of an investigation of mass concentrations in relation to size fraction particles PM10, PM2.5, PM1, PM0.5 and PM0.25. Investigations showed that Diesel fumes contained first of all fine particles: 95-99% particles below 2.5 µm, 91-98% below 1 µm, 87-96% below 0.5 µm and 66-77% particles below 0.25 µm.
Źródło:
Bezpieczeństwo Pracy : nauka i praktyka; 2010, 1; 23-27
0137-7043
Pojawia się w:
Bezpieczeństwo Pracy : nauka i praktyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Termodinamicheskaja vozmozhnost povyshenija ehffectivnosti DVC
Thermodynamics possibility of increase of efficiency of combustion engines
Autorzy:
Podznoev, G.
Abdulgazis, Y.
Zharik, T.
Powiązania:
https://bibliotekanauki.pl/articles/78218.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
combustion engine
diesel fuel
exhaust gas
diesel engine
pollutant emission
heat regeneration
Opis:
A thermodynamic analysis of the possibility of catalytic reforming of water emulsified diesel fuel by the heat of the exhaust gases. The results indicate the potential for a significant increase in efficiency of a diesel engine with a substantial improvement in the quality of the kinetics and combustion and a significant reduction of pollutant emissions in the exhaust gases. Calculations confirmed a significant reduction in consumption of primary diesel fuel, while maintaining the amount of useful work
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 5
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comperative analysis of emision from engine fuelled with diesel and bio-diesel
Autorzy:
Koszałka, G.
Hunicz, J.
Kordos, P.
Powiązania:
https://bibliotekanauki.pl/articles/242081.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diesel engine
alternative fuel
bio-diesel
exhaust emissions
Opis:
The paper presents comparative analysis of operational parameters, smoke emission and toxic components contents in exhaust gases of a compression ignition engine fuelled with fossil diesel, commercial bio-diesel (fatty acid methyl ester) and their blend. Measurements were conducted on an older generation diesel engine equipped with in-line injection pump. Engine was operated in conditions of full load rotational speed characteristic and also ESC steady-state test cycle. Fourier Transform Infrared (FTIR) analytical system provided contents of 23 exhaust gas components. In particular chosen parameters of investigated fuels (on the base of quality reports), performance and fuel consumption characteristic versus rotational speed, smoke emission (D) and content of carbon monoxide (CO), unburned hydrocarbons (THC) and nitrogen oxides (NOx), sulphur dioxide (S02) and carbon dioxide (CO2) in exhaust gas of the engine fuelled with investigated fuels, emission of specific hydrocarbons of the engine fuelled with investigated fuels, of non-regulated compounds measured during the research, molar mass of analyzed exhaust compounds are presented in the paper.
Źródło:
Journal of KONES; 2009, 16, 3; 165-171
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of non-cooled exhaust gas recirculation on the diesel engine parameters
Autorzy:
Cisek, J.
Powiązania:
https://bibliotekanauki.pl/articles/134037.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
diesel engine
exhaust gases
EGR
exhaust gas recirculation
silnik spalinowy
spaliny
recyrkulacja spalin
Opis:
This paper presents the results of the diesel engine research on the energy performance, components of exhaust gases and smoke and parameters related to the supply system for VW 1.9 TDI working in 2 modes: with standard, non-cooled EGR system, and without this system. All of measurements were carried out on the some engine speed – 2000 rpm (speed of maximum engine torque) and various engine loads. It was found that the serial engine control unit switches the EGR system off above 150 Nm engine load (Momax = 295 Nm). In this range of load the engine running with EGR is characterized by higher fuel consumption (lower total efficiency) ca. 5%, compared with engine without EGR. Concentration of NOx in exhaust gases was lower up to 45% but, at the same time, exhaust gas smoke and concentration of carbon oxides were strongly increasing. It can be seen that EGR system increases the temperature (up to 110°C) and changes the composition of air-exhaust gas in the intake manifold. One of reason of this fact is self-changing start of injection. Additional effect of EGR is lower air pressure behind turbocharger, because the flow of exhaust gases (into EGR) is taken before the turbine.
Źródło:
Combustion Engines; 2017, 56, 4; 269-273
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of biodiesel blended fuel on the performance and emission characteristics of diesel engines – a review
Autorzy:
Zheng, Fangyuan
Cho, Haeng Muk
Xu, Changchun
Powiązania:
https://bibliotekanauki.pl/articles/2174181.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
biodiesel
paliwo
emisja spalin
diesel engine
fuel properties
engine performance
exhaust emission
Opis:
The internal combustion engine plays a vital role in transportation, industry, and shipping. However, diesel as one of the main fuels for internal combustion engines, caused many environmental and human health problems. In order to solve the problems, more researchers have been committed to the research of alternative fuels. Biodiesel is a renewable, sustainable alternative fuel, and its characteristics are similar to traditional diesel. It can be mixed with pure diesel. It has been found that a mix with pure diesel in a certain ratio can effectively reduce the negative effects caused by its characteristics, improve the combustion performance, and reduce the NOx and PM emissions. This article mainly reviews the effects of the mixture of biodiesel and diesel on engine combustion characteristics and exhaust emissions, including three parts: part (1) summarizes and analyzes the biodiesel’s production and characteristics, part (2) analyzes the engine’s performance under different working conditions, and part (3) studies and analyzes the exhaust emission under different working conditions.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 215--231
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of rise of exhaust resistance at torque and angular speed of two-stroke engine
Autorzy:
Dereszewski, M.
Charchalis, A.
Powiązania:
https://bibliotekanauki.pl/articles/245462.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diagnostics
diesel engine
exhaust pipe resistance
torque
angular speed
Opis:
It is assumed that elements of Exhaust Gases Cleaning Systems creates additional resistance along fumes duct and can affect energetic process of combustion. In the paper are presented results of researches aimed on detection and recognition of dumping effect in the exhaust pipeline using devices dedicated for engine’s torque and angular speed measurement. The experiment was carried out in test stand of Gdynia Maritime University; equipped with one-cylinder, low speed engine working in two-stroke mode. Effect of increasing of gas flow resistance was achieved by installation of shutters in cross-section of exhaust pipe. The shutters diminished active flow „window“ for 50% of normal crossection area of the exhaust pipe The plan of measurements encompasses registration of Instantaneous Angular Speed of the engine’s shaft and parallel registration of Instantaneous Value of Shaft Torsion, what reflect fluctuation of torque. Value of angular speed and toque enables exact calculation of power produced by the engine. Experiment included measurements at different levels of engine’s load and with changes of mean rotational speed. Angular speed and shaft’s torsion were measured and recorded using system ETNP-10 which is based on optical sensor and set of toothed discs. That method gives high accuracy of angular speed and torsion measurement. Results of experiment are presented as difference of related curves of values’ variations of angular speed and torsion occurring at the propulsion shaft connecting the engine and the water brake.
Źródło:
Journal of KONES; 2015, 22, 4; 87-93
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The properties of a HDV diesel engine fuelled by crude rapeseed oil
Wlasciwosci silnika diesla zasilanego naturalnym olejem rzepakowym
Autorzy:
Cisek, J.
Mruk, A.
Hlavna, V.
Powiązania:
https://bibliotekanauki.pl/articles/793466.pdf
Data publikacji:
2011
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
crude rapeseed oil
rapeseed oil
energy parameter
exhaust gas
particulate matter
diesel engine
engine operation
breakdown
combustion engine
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
Tytuł:
The effect of aviation fuel JP-8 and diesel fuel blends on engine performance and exhaust emissions
Autorzy:
Labeckas, G.
Slavinskas, S.
Vilutienė, V.
Powiązania:
https://bibliotekanauki.pl/articles/949492.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diesel engine
jet fuel
diesel fuel
autoignition
combustion
performance
exhaust emissions
Opis:
The article presents bench test results of a four-stroke, four-cylinder, naturally aspirated, DI diesel engine operating with neat JP-8 fuel (J) and its blends with Diesel fuel (D) in following proportions by volume: 90/10 (J+10D), 70/30 (J+D30), 50/ 50 (J+D50), 30/70 (J+D70), and 100% diesel fuel (DF). The purpose of the research was to analyse and compare changes occurred in the autoignition delay, combustion events, engine performance efficiency, emissions, and smoke of the exhaust when running on JP-8 fuel, jet-diesel fuel blends, and diesel fuel at a full (100%) engine load and speed of 1400 min–1 at which maximum torque occurs and rated speed of 2200 min–1. It was found that the start of injection (SOI) and the start of combustion (SOC) occurred earlier in an engine cycle and the autoignition delay decreased by 9.0% and 12.7% due to replacement of aviation JP-8 fuel with diesel fuel at a full load and the latter speeds. Maximum in-cylinder pressure was 6.8% and 4.0% higher when operating with diesel fuel, whereas brake thermal efficiency was 3.3% and 7.7% higher, and brake specific fuel consumption 2.8% and 7.0% lower when using fuel blend J+D50 compared with the respective values measured with neat JP-8 fuel. Emissions of nitric oxide (NO) and nitrogen oxides (NOx) were 13.3% and 13.1% higher from a straight diesel running at speed of 1400 min–1, and 19.0% and 19.5% higher at a higher speed of 2200 min–1. The carbon monoxide (CO) emissions and total unburned hydrocarbons (HC) decreased 2.1 times and by 12.3% when running with fuel blend J+D70 at speed of 2200 min–1 compared with those values measured with jet fuel. Smoke of the exhaust was 53.1% and 1.9% higher when using fuel blend J+D10 than that of 46.9% and 70.0% measured with jet fuel at speeds of 1400 and 2200 min–1. The engine produced 34.5% more smoke from combustion of fuel blend J+D70 at the low speed of 1400 min–1, but smoke converted to be 11.3% lower when operating at a higher speed of 2200 min–1.
Źródło:
Journal of KONES; 2015, 22, 2; 129-138
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exhaust emission features of variable compression ratio (VCR) diesel engine
Autorzy:
Woś, P.
Kuszewski, H.
Ustrzycki, A.
Powiązania:
https://bibliotekanauki.pl/articles/247640.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diesel engine
compression ratio
variable compression ratio VCR
exhaust emission
toxic compounds
Opis:
One of the important design parameters for internal combustion engines is the geometric compression ratio epsilon. It is defined by the ratio of the maximum volume of the combustion chamber Vmax at the bottom dead centre (BDC) piston position and a minimum volume of the combustion chamber Vmin at the top dead centre (TDC) piston position. Conventional engines have this parameter set unchangeable, what is not the solution ensuring optimal benefits coming from the heat release in the combustion process, especially under altering conditions of load and speed in which they perform powering the road vehicles. It is reflected mainly in exhaust emission problem. Despite a considerable progress, further improving the ecological and energetic performances of the piston engines faces severe system limits, elimination of which requires major changes in engine design, including conversion the fixed compression ratio into the flexible one. For such innovative engine designs with so-called variable compression ratio VCR feature the geometric compression ratio parameter is as the one of the operation regulators. Due to the new development prospect the paper scope is an analysis and showing some results for the impact of compression ratio on the emissions of selected exhaust harmful components for a direct injection diesel engine. The schematics and prototype solutions for VCR technology are briefly presented too.
Źródło:
Journal of KONES; 2010, 17, 3; 521-526
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of exhaust gas recirculation on the process of combustion in the self-ignition engine
Autorzy:
Ambrozik, T.
Kosno, M.
Powiązania:
https://bibliotekanauki.pl/articles/950109.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
exhaust gas recirculation (EGR)
diesel engine
start of combustion
nitrogen of oxides
Opis:
The paper compares the basic parameters of the process of combustion in the Fiat MultUet 1.3 SDE 90 KM with and without an exhaust gas recirculation system, running according to load characteristics with the following engine crankshaft rotational speeds: n=l200 ipm, 1750 rpm and 3000 rpm. During testing, the engine was supplied with commercial diesel oil. The tested engine was provided with external exhaust gas recirculation consisting in supplying a specific amount of exhaust gas back to the cylinder via an EGR electric solenoid valve. The exhaust gas delivered to the cylinder was cooled. Exhaust gas is composed of inert gases that do not take part in the combustion process. This causes, above all, a lower rate of pressure increase in the cylinder and a lower heat release rate. Thanks to exhaust gas recirculation, lower maximal temperatures prevail in the cylinder, and the engine's operation is "softer." During experimental testing, the variation of cylinder pressure and chamber pressure, the injector operation control current magnitude, effective power, torque and the hourly fuel consumption, as well as the exhaust gas recirculation rate. Actual indicator diagrams plotted were used for determining the heat release characteristics, based on which the percentage fractions of the burned out fuel charge injected during one engine running cycle namely 5, 10, 50 and 90% fractions were determined. In addition, the indicator indices were determined. The paper has demonstrated the effect of exhaust gas recirculation on the processes occurring inside the cylinder in the self ignition internal combustion engine.
Źródło:
Journal of KONES; 2014, 21, 2; 7-14
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuel impact on emissions of harmful components of the exhaust gas from the ci engine during cold start-up
Wpływ paliwa na emisję szkodliwych składników spalin silnika o zapłonie samoczynnym podczas zimnego rozruchu
Autorzy:
Ambrozik, A.
Ambrozik, T.
Łagowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/1365890.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
diesel engine
engine start-up
biofuel
exhaust emission
silnik o zapłonie samoczynnym
rozruch silnika
biopaliwo
emisja spalin
Opis:
The paper presents the results of tests on the compression ignition PEUGEOT 2.0 HDI engine. It was fuelled by commercial diesel oil, B50 blend (50 % diesel oil and 50 % rapeseed oil fatty acid methyl esters), and blend of diesel oil and 5% EKO-V fuel additive manufactured by the INWEX company. The tests were conducted for cold and hot engine. When the engine started up from cold, the temperature of the coolant and lubricating oil was equal to the ambient temperature. In hot engine start-up, the temperature of the engine oil and the coolant was 90 ºC. The values of concentrations of the exhaust gas harmful components were measured before the catalytic converter.
W artykule przedstawiono wyniki badań silnika o zapłonie samoczynnym PEUGEOT 2.0 HDI zasilanego handlowym olejem napędowym, mieszaniną B50 (50 % oleju napędowego i 50 % estrów metylowych kwasów tłuszczowych oleju rzepakowego) i oleju napędowego z dodatkiem 5% preparatu EKO-V firmy INWEX. Badania wykonano dla zimnego i rozgrzanego silnika. Podczas rozruchu zimnego silnika temperatura cieczy chłodzącej i oleju smarnego była równa temperaturze otoczenia, natomiast podczas rozruchu silnika ciepłego temperatura oleju silnikowego i cieczy chłodzącej wynosiła 90ºC. Wartości stężeń szkodliwych składników spalin zmierzono przed katalizatorem utleniającym zainstalowanym w układzie wydechowym silnika.
Źródło:
Eksploatacja i Niezawodność; 2015, 17, 1; 95-99
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal'noe sootnoshenie dizel'nogo i gazoobraznogo topliv po kriteriju privedennogo vybrosa toksichnykh veshhestv
Optimum blending of diesel and gaseous fuels based on a criterion of the specific reduced pollutant emission
Autorzy:
Boltjanskjj, O.
Millaeva, I.
Stefanovskijj, A.
Powiązania:
https://bibliotekanauki.pl/articles/77541.pdf
Data publikacji:
2016
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
diesel engine
gaseous fuel
combustion gas
pollutant emission
nitrogen oxide
exhaust gas
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2016, 18, 1
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of processes in the WLTC test of a passenger car with a diesel engine
Autorzy:
Andrych-Zalewska, Monika
Powiązania:
https://bibliotekanauki.pl/articles/24202473.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
diesel engine
exhaust emission
WLTC test
silnik diesla
emisja spalin
test WLTC
Opis:
The test results and their analysis was discussed in this article. The tests were carried out in accordance with the WLTP (Worldwide Light Duty Test Procedure), on a passenger car with a compression ignition engine. The analysis was conducted doe the following variables: vehicle speed, exhaust emission rate and fuel consumption volumetric rate. The subject of the research are exhaust emission components that are harmful to the health of living organisms: carbon monoxide, hydrocarbons and nitrogen oxides, as well as greenhouse gases. The research results have shown a very large range of values for carbon monoxide, organic compounds and nitrogen oxides emission rate characteristics. The average distance-specific emissions values of carbon monoxide, organic compounds and nitrogen oxides were very small and were in line with the Euro 6 requirements within a large margin. Correlation studies of the measured variables were conducted - between vehicle speed and exhaust emission rate as well as volumetric fuel consumption rates, and between exhaust emission rates and volumetric fuel consumption rates. The correlation studies have shown that the highest coefficient of determination in relation to vehicle speed was found for volumetric fuel consumption and carbon dioxide emission rate, and the weakest correlation for carbon monoxide emission rate and nitrogen oxides emission rate. The correlation between the rate of volumetric fuel consumption and carbon dioxide emission, as well as for hydrocarbon emission and methane emission rates, was found to be the strongest. The carbon monoxide emission rate was the least correlated with all the other measured variables. Dimensionless statistical characteristics of the measured variables were determined, such as: extreme values, range, mean value, median, standard deviation, kurtosis, skewness and coefficient of variation. For all of them, the mean value was much greater than the median, and the standard deviation was greater still, than both of those values. The numerical distributions for the values of exhaust emission rate and volumetric fuel consumption turned out to be leptokurtic and have right-sided asymmetry. The coefficient of variation analysis made it possible to assess that the most dynamic properties could be observed in organic compounds emission rate, followed by carbon monoxide and nitrogen oxides emission rates, and finally - the vehicle speed. Histograms of the examined processes were determined. The vehicle speed histogram was characterized by relative uniformity apart from the dominance of the idle speed. Histograms of exhaust emission rate variables were most frequently dominated by small values. The zero values occurred less frequently for the fuel consumption volumetric rate histogram. Based on the conducted research and the obtained data, a set of conclusions was drawn.
Źródło:
Combustion Engines; 2023, 62, 3; 52--62
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
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