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![View and the block diagram of the noise level's measuring device [own study based on 9]: microphone, 2. amplifier with a discrete adjusted voltage divider, 3. type of operation's changeover switch, 4. set of band filters, 5. set of correction filters, 7. ancillary systems.](publication/328238505/figure/fig3/AS:680908436807680@1539352630081/View-and-the-block-diagram-of-the-noise-levels-measuring-device-own-study-based-on-9.png)
View and the block diagram of the noise level's measuring device [own study based on 9]: microphone, 2. amplifier with a discrete adjusted voltage divider, 3. type of operation's changeover switch, 4. set of band filters, 5. set of correction filters, 7. ancillary systems.
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![Figure 4. The tested power unit [own study] Measurement of the noise...](publication/328238505/figure/fig2/AS:680908436824064@1539352630037/The-tested-power-unit-own-study-Measurement-of-the-noise-generated-by-the-power-unit_Q320.jpg)
![Figure 6. Diagram of the measurement area [own study based on 9]](publication/328238505/figure/fig4/AS:680908436803587@1539352630119/Diagram-of-the-measurement-area-own-study-based-on-9_Q320.jpg)
Generation of noise by reciprocating internal combustion engines is the effect of operation performed by them. Modernization of fuel feeding the power unit makes it possible to limit the emitted sounds preserving the engine's high operating parameters. The conducted studies concerned comparison of the noise emission generated by a combustion engine...
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![Fig. 2. Transport energy demand in years 2000 -2017 [7].](profile/Patryk-Urbanski/publication/352737238/figure/fig2/AS:1038523054452737@1624614599460/Transport-energy-demand-in-years-2000-2017-7_Q320.jpg)
Vehicles used in rail transport are characterized by a long service life, which is caused, among others, by the high cost of their purchase. In Poland, the average age of freight diesel locomotives exceeds 40 years. Increasing the wear and tear of vehicles has an impact on many aspects of machine operation, including environmental pollution. Signif...
Citations
... Emissivity reduction in a self-ignition engine while maintaining its high efficiency needs to be further explored for ecological reasons. The conducted tests have confirmed that the use of fuels from renewable sources contributes to reduction in the emissions of exhaust gases harmful to the natural environment, which has been proven by many authors involved in this subject [11,[39][40][41][42][43][44][45][46][47][48][49]. The tests described in this study were performed for the standard settings of the vehicle deck computer. ...
This study presents pro-ecological activities focused on an analysis of the use of biofuels as an environmentally friendly fuel. The research objects were different concentration mixtures of diesel fuel and fatty acid methyl esters, that is, transesterified plant oils. The tests involved an assessment of the performance parameters of a drive unit in a vehicle powered by diesel fuel for different mixtures of diesel oil and fatty acid methyl esters in the following proportions: 10%, 30%, 50% and 50% with chemical additives. The tests were comparative and were conducted for ‘pure’ diesel (ON). The study presents test results of selected performance parameters of the analyzed power unit. The object of the tests was a self-injection engine with a maximum power of 81 kW. The main tests which were most important for assessment of the mixtures, from the point of view of their effect on the analyzed performance parameters, involved measuring power and torque, and the toxic components of exhaust gases. Based on the obtained results, a statistical analysis was carried out, and a model for the evaluation of how the research object functions when fed with different fuel mixtures was developed. The research found which mixture can be considered the most optimal, and what the influence of individual fuel mixtures is on the analyzed performance parameters of the tested power unit.
... Emmissivity reduction of a self ignition engine maintaining its high efficiency needs to be further explored for ecological reasons. The conducted tests have confirmed that use of fuels from renewable sources contributes to reduction in emission of exhaust gases harmful to the natural environment which has been proven by many authors involved in this subject [45][46][47][48][49][50][51][52][53]. The tests described in this study were performed for standard settings of the vehicle deck computer. ...
Natural environment protection and preserving natural resources of our planet are very important issues. This study deals with the issues related to use of fatty acid methyl esters to power combustion engines and its impact on the performance of selected drive units. The study objects are motor vehicles equipped with 81 kW self ignition engine and Common Rail injection system. The tests were divided into two steps, that is, initial tests and main tests. Initial tests involved identification of physical-chemical characteristics of the analyzed mixtures. Fuel mixtures with a higher content of fatty acid methyl esters had a higher cetane number by about 4% and a higher viscosity index by about 12%. Main tests involved measurement of ten performance parameters of the drive units such as: power, torque, noise emission, content of solid particles in exhaust and the composition of exhaust gases (oxygen, carbon monoxide, hydrocarbons, nitric oxides and the air excess coefficient). The tests results were used for development of a resultant model for assessment of the study object operation. The model was verified by means of fuzzy logic. The presented method of fuzzy mean diagrams was a tool for assessment of the impct of fatty acid methyl ester additives in fuel on performance of drive units of the analyzed transport means. The assessment shows that the composition of the fuel mixture had the greatest impact on the oxygen and carbon dioxide criterion, and the smallest on the particulate parameter. Their grades were respectively 0,1353 and 0,0755 and 0,0002. The analysis showed the legitimacy of using these fuel mixtures.
... The most common indicators of the combustion engine operation are power, torque, fuel consumption, and exhaust emission components. An analysis of literature shows an increase in the values of the engine performance parameters and lower power drops as compared to diesel oil, depending on the combustion system and characteristics of the injection system [9,[34][35][36][37][38][39]. Powering combustion engines with biofuels also contributes to a reduction in pollution caused by exhaust emission components such as carbon monoxides, hydrocarbons, and PM [28,[40][41][42][43][44][45][46][47][48][49]. ...
The application of fuels from renewable energy sources for combustion engine powering involves a great demand for this kind of energy while its production infrastructure remains underdeveloped. The use of this kind of fuel is supposed to reduce the emission of greenhouse gases and the depletion of natural resources and to increase the share of renewable energy sources in total energy consumption and thus support sustainable development in Europe. This study presents the results of research on selected performance parameters of transport by internal combustion engines including: power, torque, the emission of sound generated by the engine, the content of exhaust components (oxygen O2, carbon monoxide CO, carbon dioxide CO2, nitrogen dioxide NO2), and the content of particulate matter (PM) in exhaust emission. Three self-ignition engines were tested. The fuel injection controllers of the tested internal combustion engines were additionally adjusted by increasing the fuel dose and the load of air. The material used in the tests were mixtures of diesel oil and fatty acid methyl esters of different concentration. A statistical analysis was performed based of the results. The purpose of the work was to develop a resulting model for assessing the operation of engines fueled with biofuel and diesel mixtures while changing the vehicle's computer software. A computer simulation algorithm was also developed for the needs of the tests which was used to prognose the state of the test results for variable input parameters.
