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Application of cooled Exhaust Gas Recirculation on modern gasoline engines
Bazala, Jiří ; Bauer, František (referee) ; Tůma, Jiří (referee) ; Píštěk, Václav (advisor)
This document describes the possibilities of increasing the efficiency of an internal combustion engine using cooled EGR (exhaust recirculation system), water injection and their combination. To investigate it the engine model was calibrated based on the experiment. It was investigated the effect of the externally cooled EGR system on key engine parameters such as efficiency, specific fuel consumption, performance and others on this model. Here it was concluded that EGR system has unsatisfactory parameters in terms of the ratio of achieved results and complexity. Therefore, the water injection model was tested on the model and compared with the EGR system. The engine model with water injection was evaluated as more advantageous. Therefore, it was decided to invest available sources to the experimental vehicle with water injection and verify experimental results with model. Using of both systems, the EGR system and water injection, and ideally with the possibility of pre-ignition, appears to be the most suitable combination with regard to the observed parameters.
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Analysis of technical-economic parameters of the tractor kits in transport
Krátký, Martin ; Slimařík, Dušan (referee) ; Bauer, František (advisor)
This thesis deals with the use of the tractor in agricultural transport. The first part describes the current status in construction of tractor engines, transmissions and chassis that are used in tractors suitable for transport. The theoretical section includes an overview of the legislative requirements that must be followed for the tractor kits in transport on the road. The main objective of this thesis was to evaluate a measuring of fuel consumption and efficiency of the tractor JCB Fastrac 185-65 with two flatbed trailers. For this purpose was created the methodics off terrain measurement, which were carried out for different operation modes of the engine. The results were tabular and graphical processing including determining the accuracy of the method by calculating the relative error of measurement. For comparison a theoretical calculation of the consumed fuel was made. The aim of the measurements was to demonstrate fuel-saving during operation engine in the economic field and get an overview about fuel consumption and efficiency kits.
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Effect of engine load on the output parameters of the tractor kits
Paulmichl, Roman ; Svída, David (referee) ; Bauer, František (advisor)
The thesis deals with the current situation in the construction of tractors, particularly engines and accessories. The work includes a methodology for measuring tractor rigs in traffic as well as methodology for plough/plow kits measuring. The measured values were tabulated, graphically presented and analysed. The thesis provides an overview of the issue of the combustion engine load placed on the engine by working conditions in transport, during primary soil tillage with different modes of operation of the tractor set. The thesis aim is to find out the practical effect of the engine load on the monitored parameters and to indicate possibilities for achieving higher efficiency in tractor units with minimum fuel performance
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Analýza technických parametrů vznětových spalovacích motorů
Káňa, Jiří
The diploma thesis "Analysis of technical parameters of compression ignition engines" deals with the current concept of diesel engine construction. The introduction introduces the development of a diesel engine to the present. Furthermore, it discusses the current state of the engine design and its problems, there are presented the technical parameters of the selected set of diesel engines. The technical parameters are tabular, there is a graphical and computational analysis. The final stage of the work is to discuss and conclude on the topic of diesel combustion engines.
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Přehled vybraných parametrů traktorů dostupných na trhu v České republice - rešerše
KOPENEC, Jiří
The bachelor thesis is focused on finding and comparing various parameters of tractors available on the market in the Czech Republic in 2016. The main objective was to find out which tractors are available on the Czech market and to compare them according to performance classes and within performance classes according to selected parameters such as fuel consumption at maximum engine power, purchase price, maximum torque, fuel tank capacity, torque increase, turning radius, cab noise and maximum speed. The results were recorded in the tables, evaluated, compared, and graphically presented. The literary research contains information on the history of tractors, their distribution and the available tractors brands on the Czech market.
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Analýza vybraných technických parametrů vznětových spalovacích motorů
Tamáši, Adam
The bachelor thesis analyses selected technical parameters of diesel engines. The theoretical part describes the present situation in construction of modern diesel engines, and especially the tractor ones. Furthermore, it also lists new trends in construction of engines as such. Beyond that, the thesis describes characteristics of combustion engines and methods used to measure the tractor engines, especially those measurements conducted by the German independent DLG test center according to international standards OECD. The practical part then consists of data sorted into tables and analyses technical parameters and results of measurements conducted in the aforementioned DLG test center. The analysis of selected measurements of six cylindrical tractor diesel engines focuses primarily on specific fuel consumption, and its results prove the irrefutable dependence of the specific fuel consumption on the stroke volume of the engine.
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Analysis of technical-economic parameters of the tractor kits in transport
Krátký, Martin ; Slimařík, Dušan (referee) ; Bauer, František (advisor)
This thesis deals with the use of the tractor in agricultural transport. The first part describes the current status in construction of tractor engines, transmissions and chassis that are used in tractors suitable for transport. The theoretical section includes an overview of the legislative requirements that must be followed for the tractor kits in transport on the road. The main objective of this thesis was to evaluate a measuring of fuel consumption and efficiency of the tractor JCB Fastrac 185-65 with two flatbed trailers. For this purpose was created the methodics off terrain measurement, which were carried out for different operation modes of the engine. The results were tabular and graphical processing including determining the accuracy of the method by calculating the relative error of measurement. For comparison a theoretical calculation of the consumed fuel was made. The aim of the measurements was to demonstrate fuel-saving during operation engine in the economic field and get an overview about fuel consumption and efficiency kits.
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Effect of engine load on the output parameters of the tractor kits
Paulmichl, Roman ; Svída, David (referee) ; Bauer, František (advisor)
The thesis deals with the current situation in the construction of tractors, particularly engines and accessories. The work includes a methodology for measuring tractor rigs in traffic as well as methodology for plough/plow kits measuring. The measured values were tabulated, graphically presented and analysed. The thesis provides an overview of the issue of the combustion engine load placed on the engine by working conditions in transport, during primary soil tillage with different modes of operation of the tractor set. The thesis aim is to find out the practical effect of the engine load on the monitored parameters and to indicate possibilities for achieving higher efficiency in tractor units with minimum fuel performance
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