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The article describes a compression-ignition engine working with a dual-fuel system installed in diesel locomotive TEP70 BS. The model of the locomotive engine has been created applying AVL BOOST and Diesel RK software and engine performance simulations. Combustion characteristics have been identified employing the mixtures of different fuels. The paper compares ecological (CO2, NOx, PM) and energy (in-cylinder pressure, temperature and the rate of heat release (ROHR)) indicators of a diesel and fuel mixtures-driven locomotive. The performed simulation has shown that different fuel proportions increased methane content and decreased diesel content in the fuel mixture, as well as causing higher in-cylinder pressure and ROHR; however, in-cylinder temperature dropped. CO2, NOx and PM emissions decrease in all cases thus raising methane and reducing diesel content in the fuel mixture.
Imantas Lipskis; Saugirdas Pukalskas; Paweł Droździel; Dalibor Barta; Vidas Žuraulis; Robertas Pečeliūnas. Modelling and Simulation of the Performance and Combustion Characteristics of a Locomotive Diesel Engine Operating on a Diesel–LNG Mixture. Energies 2021, 14, 5318 .
AMA StyleImantas Lipskis, Saugirdas Pukalskas, Paweł Droździel, Dalibor Barta, Vidas Žuraulis, Robertas Pečeliūnas. Modelling and Simulation of the Performance and Combustion Characteristics of a Locomotive Diesel Engine Operating on a Diesel–LNG Mixture. Energies. 2021; 14 (17):5318.
Chicago/Turabian StyleImantas Lipskis; Saugirdas Pukalskas; Paweł Droździel; Dalibor Barta; Vidas Žuraulis; Robertas Pečeliūnas. 2021. "Modelling and Simulation of the Performance and Combustion Characteristics of a Locomotive Diesel Engine Operating on a Diesel–LNG Mixture." Energies 14, no. 17: 5318.
Notwithstanding the substantial progress acheved since 2010 in the attempts to realize the potential of microalgae biofuels in the transportation sector, the prospects for commercial production of CO2-neutral biofuels are more challenging today than they were in 2010. Pure P. moriformis microalgae oil was subjected to unmodified engine performance testing as a less investigated type of fuel. Conventional diesel was used as a reference fuel to compare and to contrast the energy balances of an engine as well as to juxtapose performance and emission indicators for both unary fuels. According to the methodology applied, the variation of BSFC rates, BTE, smoke opacity, NOx, HC, CO2, O2, and exhaust gas temperature on three different loads were established during compression ignition (CI) engine operation at EGR Off, 25% EGR, 18% EGR and 9% EGR modes, respectively. Simulation model (AVL Boost/BURN) was employed to assess the in-cylinder process parameters (pressure, pressure rise, temperature, temperature rise, ROHR, and MFB). Furthermore, the first law energy balances for an engine running on each of the test fuels were built up to provide useful insights about the peculiarities of energy conversion. Not depending on EGR mode applied, the CI engine running on microalgae oil was responsible for slightly higher BTE values, drastically reduced smoke opacity, higher CO2 values, and smaller O2 concentration, marginally increased NOx levels and lower total energy losses (in %) if compared to the performance with diesel fuel.
Mantas Felneris; Laurencas Raslavičius; Saugirdas Pukalskas; Alfredas Rimkus. Assessment of Microalgae Oil as a Carbon-Neutral Transport Fuel: Engine Performance, Energy Balance Changes, and Exhaust Gas Emissions. Sustainability 2021, 13, 7878 .
AMA StyleMantas Felneris, Laurencas Raslavičius, Saugirdas Pukalskas, Alfredas Rimkus. Assessment of Microalgae Oil as a Carbon-Neutral Transport Fuel: Engine Performance, Energy Balance Changes, and Exhaust Gas Emissions. Sustainability. 2021; 13 (14):7878.
Chicago/Turabian StyleMantas Felneris; Laurencas Raslavičius; Saugirdas Pukalskas; Alfredas Rimkus. 2021. "Assessment of Microalgae Oil as a Carbon-Neutral Transport Fuel: Engine Performance, Energy Balance Changes, and Exhaust Gas Emissions." Sustainability 13, no. 14: 7878.
Biogas is one of the alternative solutions that could reduce the usage of fossil fuels and production of greenhouse gas emissions, as biogas is considered as an alternative fuel with a short carbon cycle. During biogas production, organic matter is decomposed during an anaerobic digestion process. Biogas mainly consists of methane and carbon dioxide, of which the ratio varies depending on the raw material and parameters of the production process. Therefore, engine parameters should be adjusted in relationship with biogas composition. In this research, a spark ignition engine was tested for mixtures of biogas with 0 vol%, 20 vol%, 40 vol% and 50 vol% of CO2. In all experiments, two cases of spark timing (ST) were used; the first one is a constant spark timing (26 crank angle degrees (CAD) before top dead center (BTDC)) and the second one is an advanced spark timing (optimal for biogas mixture). Results show that increasing the CO2 concentration and using constant spark timing increases the mass burned fraction combustion duration by 90%, reduces the in-cylinder pressure and leads to a reduction in the brake thermal efficiency and nitrogen oxides emissions at all measurement points. However, the choice of optimal spark timing increases the brake thermal efficiency as well as hydrocarbon and CO2 emission.
Donatas Kriaučiūnas; Saugirdas Pukalskas; Alfredas Rimkus; Dalibor Barta. Analysis of the Influence of CO2 Concentration on a Spark Ignition Engine Fueled with Biogas. Applied Sciences 2021, 11, 6379 .
AMA StyleDonatas Kriaučiūnas, Saugirdas Pukalskas, Alfredas Rimkus, Dalibor Barta. Analysis of the Influence of CO2 Concentration on a Spark Ignition Engine Fueled with Biogas. Applied Sciences. 2021; 11 (14):6379.
Chicago/Turabian StyleDonatas Kriaučiūnas; Saugirdas Pukalskas; Alfredas Rimkus; Dalibor Barta. 2021. "Analysis of the Influence of CO2 Concentration on a Spark Ignition Engine Fueled with Biogas." Applied Sciences 11, no. 14: 6379.
The global policy solution seeks to reduce the usage of fossil fuels and greenhouse gas (GHG) emissions, and biogas (BG) represents a solutions to these problems. The use of biogas could help cope with increased amounts of waste and reduce usage of fossil fuels. Biogas could be used in compressed natural gas (CNG) engines, but the engine electronic control unit (ECU) needs to be modified. In this research, a spark ignition (SI) engine was tested for mixtures of biogas and hydrogen (volumetric hydrogen concentration of 0, 14, 24, 33, and 43%). In all experiments, two cases of spark timing (ST) were used: the first for an optimal mixture and the second for CNG. The results show that hydrogen increases combustion quality and reduces incomplete combustion products. Because of BG’s lower burning speed, the advanced ST increased brake thermal efficiency (BTE) by 4.3% when the engine was running on biogas. Adding 14 vol% of hydrogen (H2) increases the burning speed of the mixture and enhances BTE by 2.6% at spark timing optimal for CNG (CNG ST) and 0.6% at the optimal mixture ST (mixture ST). Analyses of the rate of heat release (ROHR), temperature, and pressure increase in the cylinder were carried out using utility BURN in AVL BOOST software.
Saugirdas Pukalskas; Donatas Kriaučiūnas; Alfredas Rimkus; Grzegorz Przybyła; Paweł Droździel; Dalibor Barta. Effect of Hydrogen Addition on the Energetic and Ecologic Parameters of an SI Engine Fueled by Biogas. Applied Sciences 2021, 11, 742 .
AMA StyleSaugirdas Pukalskas, Donatas Kriaučiūnas, Alfredas Rimkus, Grzegorz Przybyła, Paweł Droździel, Dalibor Barta. Effect of Hydrogen Addition on the Energetic and Ecologic Parameters of an SI Engine Fueled by Biogas. Applied Sciences. 2021; 11 (2):742.
Chicago/Turabian StyleSaugirdas Pukalskas; Donatas Kriaučiūnas; Alfredas Rimkus; Grzegorz Przybyła; Paweł Droździel; Dalibor Barta. 2021. "Effect of Hydrogen Addition on the Energetic and Ecologic Parameters of an SI Engine Fueled by Biogas." Applied Sciences 11, no. 2: 742.
The purpose of this paper is to analyse the possibility for predicting the outcome of a road traffic accident concerning the traffic environment, personal traits of the traffic participant and the vehicle, i.e. aiming to answer the question whether specific values of the factors analysed to increase the likelihood of a fatal accident. The logistic regression model that allows identifying the relationship between the dependent and independent variables were used in the research. Other methods for describing and analysing categorical variables were also used alongside the logistic regression. When analysing the results, it was recognised that the odds ratio above 1 shows a higher likelihood for a representative of the category in question to be involved in a fatal accident compared to a representative of the base category. Odds ratios of likelihoods for calculation of the road traffic accident types show that the likelihood of a fatal accident is statistically significant affected by rollovers or driving into obstacles, compared to vehicular collisions. When summarising the results, it was stated that most of the factors researched have an impact on the outcome of a road traffic accident. The influence of some factors has a higher probability of resulting in a fatal accident as compared to other factors.
Teresė Leonavičienė; Saugirdas Pukalskas; Vidmantas Pumputis; Erika Kulešienė; Vidas Žuraulis. Investigation of Factors That Have Affected the Outcomes of Road Traffic Accidents on Lithuanian Roads. The Baltic Journal of Road and Bridge Engineering 2020, 15, 1 -20.
AMA StyleTeresė Leonavičienė, Saugirdas Pukalskas, Vidmantas Pumputis, Erika Kulešienė, Vidas Žuraulis. Investigation of Factors That Have Affected the Outcomes of Road Traffic Accidents on Lithuanian Roads. The Baltic Journal of Road and Bridge Engineering. 2020; 15 (5):1-20.
Chicago/Turabian StyleTeresė Leonavičienė; Saugirdas Pukalskas; Vidmantas Pumputis; Erika Kulešienė; Vidas Žuraulis. 2020. "Investigation of Factors That Have Affected the Outcomes of Road Traffic Accidents on Lithuanian Roads." The Baltic Journal of Road and Bridge Engineering 15, no. 5: 1-20.
Modern engine research uses multi-dimensional Mathematical Models (MMs) that are applicable to multi-fuel engines. However, their use involves the availability of detailed technical data on the design and characteristics of the engine, which is not always possible. The use of a one-dimensional MM is more expedient for the prediction of engine parameters, but their application for this purpose has not yet been sufficiently investigated. This publication presents the results of numerical studies evaluating the application of a one-dimensional MM with bi-phase Vibe combustion laws for dual-fuel (DF) Diesel (D) and Natural Gas (NG) engine power parameters. The motor test results of a high-speed 4ČN79.5/95.5 Diesel Engine (DE) with a conventional fuel injection system were used as adequacy criteria. The engines were operated with D100 and DF D20/NG80, in high- (HLM), medium- (MLM), and low- (LLM) load modes, and the angle of Diesel-fuel Injection Timing (DIT) was changed from −1 to −13 °CA in the Before Top Dead Center (BTDC) range. Modelling of the single-phase Vibe combustion law has limited applicability for efficient use only in HLM (with an error of 7%). In the MLM and LLM regimes, owing to non-compliance with real bi-phasic combustion with a strongly extended NG diffusive second phase, the modelling error is 50%. Individual MM matching in MLM and LLM in a DF D20/NG80 experiment detected a burn time increase from between 45 and 50 °CA, to 110 and 200 °CA, respectively. Limited use of the one-dimensional MM in the evaluation of DF engine performance has been identified. When comparing a one-dimensional MM with experimental data, a bi-phase law of heat release characteristic should be considered for better coincidence. In addition, individual MM matching with an experiment on each engine load mode ensured acceptable accuracy in testing and optimising the parameters of the indicator process, including DIT.
Sergejus Lebedevas; Saugirdas Pukalskas; Vygintas Daukšys. MATHEMATICAL MODELLING OF INDICATIVE PROCESS PARAMETERS OF DUAL-FUEL ENGINES WITH CONVENTIONAL FUEL INJECTION SYSTEM. Transport 2020, 35, 57 -67.
AMA StyleSergejus Lebedevas, Saugirdas Pukalskas, Vygintas Daukšys. MATHEMATICAL MODELLING OF INDICATIVE PROCESS PARAMETERS OF DUAL-FUEL ENGINES WITH CONVENTIONAL FUEL INJECTION SYSTEM. Transport. 2020; 35 (1):57-67.
Chicago/Turabian StyleSergejus Lebedevas; Saugirdas Pukalskas; Vygintas Daukšys. 2020. "MATHEMATICAL MODELLING OF INDICATIVE PROCESS PARAMETERS OF DUAL-FUEL ENGINES WITH CONVENTIONAL FUEL INJECTION SYSTEM." Transport 35, no. 1: 57-67.
This paper presents a study on the energy efficiency and emissions of a converted high-revolution bore 79.5 mm/stroke 95 mm engine with a conventional fuel injection system for operation with dual fuel feed: diesel (D) and natural gas (NG). The part of NG energy increase in the dual fuel is related to a significant deterioration in energy efficiency (ηi), particularly when engine operation is in low load modes and was determined to be below 40% of maximum continuous rating. The effectiveness of the D injection timing optimisation was established in high engine load modes within the range of a co-combustion ratio of NG ≤ 0.4: with an increase in ηi, compared to D, the emissions of NOx+ HC decreased by 15% to 25%, while those of CO2 decreased by 8% to 16%; the six-fold CO emission increase, up to 6 g/kWh, was unregulated. By referencing the indicated process characteristics of the established NG phase elongation in the expansion stroke, the combustion time increase as well as the associated decrease in the cylinder excess air ratio (α) are possible reasons for the increase in the incomplete combustion product emission.
Sergejus Lebedevas; Saugirdas Pukalskas; Vygintas Daukšys; Alfredas Rimkus; Mindaugas Melaika; Linas Jonika. Research on Fuel Efficiency and Emissions of Converted Diesel Engine with Conventional Fuel Injection System for Operation on Natural Gas. Energies 2019, 12, 2413 .
AMA StyleSergejus Lebedevas, Saugirdas Pukalskas, Vygintas Daukšys, Alfredas Rimkus, Mindaugas Melaika, Linas Jonika. Research on Fuel Efficiency and Emissions of Converted Diesel Engine with Conventional Fuel Injection System for Operation on Natural Gas. Energies. 2019; 12 (12):2413.
Chicago/Turabian StyleSergejus Lebedevas; Saugirdas Pukalskas; Vygintas Daukšys; Alfredas Rimkus; Mindaugas Melaika; Linas Jonika. 2019. "Research on Fuel Efficiency and Emissions of Converted Diesel Engine with Conventional Fuel Injection System for Operation on Natural Gas." Energies 12, no. 12: 2413.
Numerical simulations of Nissan Qashqai HR16DE engine with increased compression ratio from 10,7:1 to 13,5:1 was carried out using AVL BOOST software. Modelled engine work cycles while engine works with biogas (BG) and hydrogen (H2) mixtures. For biogas used mixture of 35 % carbon dioxide (CO2) and 65 % methane (CH4). Three mixtures of biogas with added 5 %, 10 % and 15 % H2 was made. The simulation of engine work cycles was performed at fully opened throttle and changing engine crankshaft rotation speeds: ne1 = 1500, ne2 = 3000, ne3 = 4500, ne4 = 6000 rpm. Simulation results demonstrated what adding hydrogen to biogas increase in-cylinder temperature and nitrogen oxides (NOx) concentration because of higher mixtures lower heating values (LHV) and better combustion process. Other emissions of carbon monoxide (CO) and hydrocarbons (HC) decreased while adding hydrogen due to the fact that hydrogen is carbon-free fuel.
Donatas Kriaučiūnas; Saugirdas Pukalskas; Alfredas Rimkus. Simulation of spark ignition engine performance working on biogas hydrogen mixture. MATEC Web of Conferences 2018, 244, 03001 .
AMA StyleDonatas Kriaučiūnas, Saugirdas Pukalskas, Alfredas Rimkus. Simulation of spark ignition engine performance working on biogas hydrogen mixture. MATEC Web of Conferences. 2018; 244 ():03001.
Chicago/Turabian StyleDonatas Kriaučiūnas; Saugirdas Pukalskas; Alfredas Rimkus. 2018. "Simulation of spark ignition engine performance working on biogas hydrogen mixture." MATEC Web of Conferences 244, no. : 03001.
Saugirdas Pukalskas; Alfredas Rimkus; Mindaugas Melaika; Robertas Peceliunas. Comparison of Conventional and Hybrid Cars Exploitation Costs. Advances in Science and Technology Research Journal 2018, 12, 221 -227.
AMA StyleSaugirdas Pukalskas, Alfredas Rimkus, Mindaugas Melaika, Robertas Peceliunas. Comparison of Conventional and Hybrid Cars Exploitation Costs. Advances in Science and Technology Research Journal. 2018; 12 (1):221-227.
Chicago/Turabian StyleSaugirdas Pukalskas; Alfredas Rimkus; Mindaugas Melaika; Robertas Peceliunas. 2018. "Comparison of Conventional and Hybrid Cars Exploitation Costs." Advances in Science and Technology Research Journal 12, no. 1: 221-227.
Heorhi Kukharonak; Victar Ivashko; Saugirdas Pukalskas; Alfredas Rimkus; Jonas Matijosius. Operation of a Spark-ignition Engine on Mixtures of Petrol and N-butanol. Procedia Engineering 2017, 187, 588 -598.
AMA StyleHeorhi Kukharonak, Victar Ivashko, Saugirdas Pukalskas, Alfredas Rimkus, Jonas Matijosius. Operation of a Spark-ignition Engine on Mixtures of Petrol and N-butanol. Procedia Engineering. 2017; 187 ():588-598.
Chicago/Turabian StyleHeorhi Kukharonak; Victar Ivashko; Saugirdas Pukalskas; Alfredas Rimkus; Jonas Matijosius. 2017. "Operation of a Spark-ignition Engine on Mixtures of Petrol and N-butanol." Procedia Engineering 187, no. : 588-598.
Alfredas Rimkus; Mindaugas Melaika; Jonas Matijošius; Šarūnas Mikaliūnas; Saugirdas Pukalskas. INVESTIGATION OF COMBUSTION, PERFORMANCE AND EMISSION CHARACTERISTICS OF SPARK IGNITION ENGINE FUELLED WITH BUTHANOL – GASOLINE MIXTURE AND A HYDROGEN ENRICHED AIR. Advances in Science and Technology Research Journal 2016, 10, 102 -108.
AMA StyleAlfredas Rimkus, Mindaugas Melaika, Jonas Matijošius, Šarūnas Mikaliūnas, Saugirdas Pukalskas. INVESTIGATION OF COMBUSTION, PERFORMANCE AND EMISSION CHARACTERISTICS OF SPARK IGNITION ENGINE FUELLED WITH BUTHANOL – GASOLINE MIXTURE AND A HYDROGEN ENRICHED AIR. Advances in Science and Technology Research Journal. 2016; 10 (31):102-108.
Chicago/Turabian StyleAlfredas Rimkus; Mindaugas Melaika; Jonas Matijošius; Šarūnas Mikaliūnas; Saugirdas Pukalskas. 2016. "INVESTIGATION OF COMBUSTION, PERFORMANCE AND EMISSION CHARACTERISTICS OF SPARK IGNITION ENGINE FUELLED WITH BUTHANOL – GASOLINE MIXTURE AND A HYDROGEN ENRICHED AIR." Advances in Science and Technology Research Journal 10, no. 31: 102-108.
Highlights•Biogas is an environmentally friendly fuel for Otto engines.•The impact of supplying additional biomethane gas to a spark ignition engine is evaluated.•Engine and environmental characteristics were studied.•Using biogas requires operational modifications. AbstractThe impact of supplying additional biomethane gas with composition of 65% methane (CH4) and 35% carbon dioxide (CO2) to a spark ignition engine on energy and emission characteristics was studied. The tests were performed on a Nissan Qashqai HR 16DE engine, with the engine throttle 15% open, a constant stoichiometric fuel mixture and various ignition advance angles. It was found that an increase in added biomethane gas results the drop in engine power output. This effect had two primary causes. First, the cylinders were refilled less effectively. Second, biogas, by impacting the efficiency and speed of the combustion process, reduces the thermal efficiency of the engine. The second effect can be partially improved by accelerating the combustible ignition mixture. It was also observed that CO2 gas, which is in biogas composition, suppress combustion process which increases the content of carbon monoxide (CO) in exhaust gas, but reduces emissions of nitrous oxide (NOx). Increased carbon dioxide amount in fuel mixture has small influence on CO2 increase in exhaust gas because the methane in biogases reduces C/H ratio of the fuel mixture. Hydrocarbons which are in methane composition has smaller molecular mass, evaporates and combust easier which has influence on reduced concentration of unburnt hydrocarbons (HC).
Egle Sendzikiene; Alfredas Rimkus; Mindaugas Melaika; Violeta Makareviciene; Saugirdas Pukalskas. Impact of biomethane gas on energy and emission characteristics of a spark ignition engine fuelled with a stoichiometric mixture at various ignition advance angles. Fuel 2015, 162, 194 -201.
AMA StyleEgle Sendzikiene, Alfredas Rimkus, Mindaugas Melaika, Violeta Makareviciene, Saugirdas Pukalskas. Impact of biomethane gas on energy and emission characteristics of a spark ignition engine fuelled with a stoichiometric mixture at various ignition advance angles. Fuel. 2015; 162 ():194-201.
Chicago/Turabian StyleEgle Sendzikiene; Alfredas Rimkus; Mindaugas Melaika; Violeta Makareviciene; Saugirdas Pukalskas. 2015. "Impact of biomethane gas on energy and emission characteristics of a spark ignition engine fuelled with a stoichiometric mixture at various ignition advance angles." Fuel 162, no. : 194-201.
The presented methodology for accounting the costs caused by road accidents is based on the fact that a person who died or was injured in a traffic accident will not contribute to the economic wealfare of the country anymore or his/her contribution will reduce. Broken vehicles, damaged cargoes or defected road constructions cause huge losses to the state. A financial assessment of material losses caused by road accidents enables providing a feasibility report in respect of efficiency of newly introduced traffic safety measures. The aim of the presented methodology is an establishment of the road accident costs that would conform to the todays economic level of Lithuania. The developed methodology for accounting road accident costs will enable more precise assessment of a necessity, perspectives and priorities of investment projects in the transport system as well as an accomplishment of funding allocation tasks.
Saugirdas Pukalskas; Robertas Pečeliūnas. THE METHODOLOGY FOR CALCULATION OF ROAD ACCIDENT COSTS. Transport 2015, 30, 33 -42.
AMA StyleSaugirdas Pukalskas, Robertas Pečeliūnas. THE METHODOLOGY FOR CALCULATION OF ROAD ACCIDENT COSTS. Transport. 2015; 30 (1):33-42.
Chicago/Turabian StyleSaugirdas Pukalskas; Robertas Pečeliūnas. 2015. "THE METHODOLOGY FOR CALCULATION OF ROAD ACCIDENT COSTS." Transport 30, no. 1: 33-42.
In this research paper energy and ecological parameters of diesel engine which works under addition of hydrogen (10, 20, 30 l/ min) are presented. A survey of research literature has shown that addition of hydrogen gases improve diesel combustion; increase indicated pressure; decrease concentration of carbon dioxide (CO2), hydrocarbons (HC), particles; decrease fuel consumptions. Results of the experiment revealed that hydrogen gas additive decreased pressure in cylinder in kinetic combustion phase. Concentration of CO2 and nitrous oxides (NOx) decreased not significantly, HC – increased. Concentration of particles in engine exhaust gases significantly decreased. In case when hydrogen gas as additive was supplied, the fuel consumptions decreased a little. Using AVL BOOST software combustion process analysis was made. It was determined that in order to optimize engine work process under hydrogen additive usage, it is necessary to adjust diesel injection angle. Straipsnyje pateikiamas dyzelinio variklio, veikiančio su vandenilio priedu (10, 20, 30 l/min), energetinių ir ekologinių rodiklių tyrimas. Atlikus literatūros apžvalgą pastebėta, kad vandenilio dujų priedas pagerina dyzelino degimą, padidina indikatorinį slėgį, sumažina anglies dvideginio (CO2), angliavandenilių (HC), kietųjų dalelių koncentraciją, sumažina degalų sąnaudas. Bandymo rezultatai parodė, kad vandenilio dujų priedas sumažino variklio indikatorinį slėgį kinetinės degimo fazės metu. CO2 ir azoto oksidų (NOx) koncentracija nedaug sumažėjo, HC – padidėjo. Kietųjų dalelių koncentracija variklio išmetamosiose dujose itin sumažėjo. Tiekiant vandenilio dujas kaip priedą nedaug sumažėja dyzelino sąnaudos. AVL BOOST programa atlikta degimo proceso analizė. Nustatyta, kad siekiant optimizuoti variklio darbą, naudojant vandenilio priedą, būtina reguliuoti dyzelino įpurškimo paskubos kampą.
Jurgis Latakas; Saugirdas Pukalskas; Alfredas Rimkus; Mindaugas Melaika; Ričardas Vėgneris; Paulius Stravinskas. THE INFLUENCE OF HYDROGEN GAS ON THE MEASURES OF EFFICIENCY OF DIESEL INTERNAL COMBUSTION ENGINE / VANDENILIO DUJŲ ĮTAKA DYZELINIO VIDAUS DEGIMO VARIKLIO EFEKTYVUMO RODIKLIAMS. Mokslas - Lietuvos ateitis 2014, 6, 558 -563.
AMA StyleJurgis Latakas, Saugirdas Pukalskas, Alfredas Rimkus, Mindaugas Melaika, Ričardas Vėgneris, Paulius Stravinskas. THE INFLUENCE OF HYDROGEN GAS ON THE MEASURES OF EFFICIENCY OF DIESEL INTERNAL COMBUSTION ENGINE / VANDENILIO DUJŲ ĮTAKA DYZELINIO VIDAUS DEGIMO VARIKLIO EFEKTYVUMO RODIKLIAMS. Mokslas - Lietuvos ateitis. 2014; 6 (5):558-563.
Chicago/Turabian StyleJurgis Latakas; Saugirdas Pukalskas; Alfredas Rimkus; Mindaugas Melaika; Ričardas Vėgneris; Paulius Stravinskas. 2014. "THE INFLUENCE OF HYDROGEN GAS ON THE MEASURES OF EFFICIENCY OF DIESEL INTERNAL COMBUSTION ENGINE / VANDENILIO DUJŲ ĮTAKA DYZELINIO VIDAUS DEGIMO VARIKLIO EFEKTYVUMO RODIKLIAMS." Mokslas - Lietuvos ateitis 6, no. 5: 558-563.
Even small amount additive (10…15% by volume from whole air amount) of hydrogen (H2) into spark ignition (SI) engines obviously effects ecological parameters and engine efficiency because of H2 exclusive properties. SI engine work process simulation was made using AVL Boost simulation software. Analysis of results showed that engine power depends a lot on H2 supply technique into engine; NOx amount in exhaust gases directly proportional to the amount of H2, however, making mixture leaner up to λ = 1.6, it is possible to reach significant NOx decrease. Increased amount of H2 as an additive in fuel, changes H/C ratio in fuel mixture, also hydrogen improves properties of the mixture (particularly lean) and combustion of hydrocarbons what can be a reason of decreased HC emissions in exhaust gases. Keyword(s): Hydrogen and gasoline mixture, engine efficiency, exhaust gases, nitrous oxides, hydrocarbons, simulation.
Saugirdas Pukalskas; Alfredas Rimkus; Mindaugas Melaika; Zenonas Bogdanovičius; Jonas Matijošius. NUMERICAL INVESTIGATION ON THE EFFECTS OF GASOLINE AND HYDROGEN BLENDS ON SI ENGINE COMBUSTION. Agricultural Engineering 2014, 46, 66 -77.
AMA StyleSaugirdas Pukalskas, Alfredas Rimkus, Mindaugas Melaika, Zenonas Bogdanovičius, Jonas Matijošius. NUMERICAL INVESTIGATION ON THE EFFECTS OF GASOLINE AND HYDROGEN BLENDS ON SI ENGINE COMBUSTION. Agricultural Engineering. 2014; 46 (1):66-77.
Chicago/Turabian StyleSaugirdas Pukalskas; Alfredas Rimkus; Mindaugas Melaika; Zenonas Bogdanovičius; Jonas Matijošius. 2014. "NUMERICAL INVESTIGATION ON THE EFFECTS OF GASOLINE AND HYDROGEN BLENDS ON SI ENGINE COMBUSTION." Agricultural Engineering 46, no. 1: 66-77.
Violeta Makareviciene; Egle Sendzikiene; Saugirdas Pukalskas; Alfredas Rimkus; Ricardas Vegneris. Performance and emission characteristics of biogas used in diesel engine operation. Energy Conversion and Management 2013, 75, 224 -233.
AMA StyleVioleta Makareviciene, Egle Sendzikiene, Saugirdas Pukalskas, Alfredas Rimkus, Ricardas Vegneris. Performance and emission characteristics of biogas used in diesel engine operation. Energy Conversion and Management. 2013; 75 ():224-233.
Chicago/Turabian StyleVioleta Makareviciene; Egle Sendzikiene; Saugirdas Pukalskas; Alfredas Rimkus; Ricardas Vegneris. 2013. "Performance and emission characteristics of biogas used in diesel engine operation." Energy Conversion and Management 75, no. : 224-233.
In an effort to consume fewer non-renewable resources and use primarily raw materials of biological origin in the production of biofuel, biomass-derived biobutanol can be used for transesterification of rapeseed oil. The study investigates the physical and chemical characteristics of rapeseed oil butyl esters (RBE) and 10%, 20% and 30% RBE-diesel composites. Characteristics of RBE and their composites with conventional diesel (D) are a little different from rapeseed oil methyl esters (RME) and their composites with D, while their basic characteristics comply with the requirements of European Standard EN 14214. Comparative tests in 4-stroke 4-cylinder 1Z type diesel engine of Audi-80 using 10–30% RBE and 10–30% RME compounds as fuels have been performed, and the results indicate that the biologically derived additives improved the energy characteristics of the engine but increased the fuel consumption compared to pure diesel. Increasing the bio-component concentration up to 30% in diesel and biodiesel fuel (RME and RBE) mixtures leads to complex improvements in the environmental impact compared to pure diesel; however, in the case of mixtures with RBE, slightly higher concentrations of CO2, HC and NOx were observed in engine exhaust gases compared to RME and D mixtures of analogical composition.
Violeta Makarevičienė; Jonas Matijosius; Saugirdas Pukalskas; Ričardas Vėgneris; Irina Kazanceva; Kiril Kazancev. The exploitation and environmental characteristics of diesel fuel containing rapeseed butyl esters. Transport 2013, 28, 158 -165.
AMA StyleVioleta Makarevičienė, Jonas Matijosius, Saugirdas Pukalskas, Ričardas Vėgneris, Irina Kazanceva, Kiril Kazancev. The exploitation and environmental characteristics of diesel fuel containing rapeseed butyl esters. Transport. 2013; 28 (2):158-165.
Chicago/Turabian StyleVioleta Makarevičienė; Jonas Matijosius; Saugirdas Pukalskas; Ričardas Vėgneris; Irina Kazanceva; Kiril Kazancev. 2013. "The exploitation and environmental characteristics of diesel fuel containing rapeseed butyl esters." Transport 28, no. 2: 158-165.
Saugirdas Pukalskas; Rytis Zautra; Saulius Nagurnas; Jonas Matijošius; Virginijus Švelnia; Ričardas Vėgneris; Vidas Žuraulis; Romualdas Juknelevičius. Research Of Efficiency Of Catalytic Converters In Automobiles With An Otto Engine. The 8th International Conference "Transbaltica ‘2013". Selected papers 2013, 1 .
AMA StyleSaugirdas Pukalskas, Rytis Zautra, Saulius Nagurnas, Jonas Matijošius, Virginijus Švelnia, Ričardas Vėgneris, Vidas Žuraulis, Romualdas Juknelevičius. Research Of Efficiency Of Catalytic Converters In Automobiles With An Otto Engine. The 8th International Conference "Transbaltica ‘2013". Selected papers. 2013; ():1.
Chicago/Turabian StyleSaugirdas Pukalskas; Rytis Zautra; Saulius Nagurnas; Jonas Matijošius; Virginijus Švelnia; Ričardas Vėgneris; Vidas Žuraulis; Romualdas Juknelevičius. 2013. "Research Of Efficiency Of Catalytic Converters In Automobiles With An Otto Engine." The 8th International Conference "Transbaltica ‘2013". Selected papers , no. : 1.
The article presents the analysis of possible applications of Brown’s gas to the diesel engine running on oil. The paper also contains a review of experimental works. The selected fuel combinations are as follows: diesel fuel, diesel fuel and Brown’s gas, oil (rapeseed oil) and oil and Brown’s gas. Test results have shown that an additional supply of Brown’s gas to the engine results in a decrease in the amounts of carbon monoxide (CO) and smoke level; however it increases the total emission of nitrous oxides (NOx). The supply of Brown’s gas at low engine load increases comparative effective fuel consumption and reduces high efficiency. Nevertheless, these performance indicators tend to improve at average engine load. Santrauka Straipsnyje nagrinėjamos Brauno dujų panaudojimo galimybės aliejumi veikiančiame dyzeliniame variklyje. Apžvelgti eksperimentiniai darbai. Pasirinkti šie degalų deriniai: dyzelinas, dyzelinas ir Brauno dujos, aliejus (pagamintas iš rapsų) bei aliejus ir Brauno dujos. Bandymo rezultatai rodo, kad varikliui papildomai tiekiant Brauno dujas, mažėja anglies monoksido (CO) kiekiai ir dūmingumas, bet didėja suminė azoto oksidų emisija (NOx). Brauno dujų panaudojimas esant mažoms variklio apkrovoms didina lyginamąsias efektyviąsias degalų sąnaudas ir mažina efektyvųjį naudingumo koeficientą, bet esant vidutinėms apkrovoms šie rodikliai gerėja.
Alfredas Rimkus; Tomas Ulickas; Saugirdas Pukalskas; Jonas Matijošius; Paulius Stravinskas. APPLICATION OF BROWN’S GAS FOR A DIESEL ENGINE RUNNING ON RAPESEED OIL / BRAUNO DUJŲ PANAUDOJIMAS ALIEJUMI VEIKIANČIAME DYZELINIAME VARIKLYJE. Mokslas - Lietuvos ateitis 2012, 4, 376 -380.
AMA StyleAlfredas Rimkus, Tomas Ulickas, Saugirdas Pukalskas, Jonas Matijošius, Paulius Stravinskas. APPLICATION OF BROWN’S GAS FOR A DIESEL ENGINE RUNNING ON RAPESEED OIL / BRAUNO DUJŲ PANAUDOJIMAS ALIEJUMI VEIKIANČIAME DYZELINIAME VARIKLYJE. Mokslas - Lietuvos ateitis. 2012; 4 (4):376-380.
Chicago/Turabian StyleAlfredas Rimkus; Tomas Ulickas; Saugirdas Pukalskas; Jonas Matijošius; Paulius Stravinskas. 2012. "APPLICATION OF BROWN’S GAS FOR A DIESEL ENGINE RUNNING ON RAPESEED OIL / BRAUNO DUJŲ PANAUDOJIMAS ALIEJUMI VEIKIANČIAME DYZELINIAME VARIKLYJE." Mokslas - Lietuvos ateitis 4, no. 4: 376-380.