National Repository of Grey Literature 94 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Over-expanded internal-combustion engines
Novotný, Pavel ; Janoušek, Michal (referee) ; Drápal, Lubomír (advisor)
At the beginning there is a short history of over-expanded engines. Subsequently, the thermodynamics of ideal over-expanded cycles are analysed and compared with the ideal Otto cycle. The thesis also deals with some design solutions for achieving over-expansion in an internal combustion engine. In the thesis there are also selected over-expanded engines from leading world carmakers. At the end the thesis deals with systems with variable compression ratio.
Design of a functional model of a chassis dynamometer
Sobota, Matej ; Drápal, Lubomír (referee) ; Štětina, Josef (advisor)
The aim of my diploma thesis was engineering design of 4x4 chassis dynamometer model at 1:10 scale for presentation purpose and for testing RC cars models. The first part describes the current types of chassis dynamometers. The main goal of the thesis was designed the model itself in order to produce some parts of the dynamometer using 3D printing. The work also includes production drawings of individual parts and economic estimate of the entire production.
Piston of a spark-ignition engine for 3-D printing
Zelko, Lukáš ; Dlugoš, Jozef (referee) ; Drápal, Lubomír (advisor)
The goal of the thesis was to design a piston manufactured by conventional method and subsequently adjusted one for additive manufacturing. Beside the designs, thermo-structural model was created for both pistons, considering maximal loading of the engine. Analysis evaluation showed the possibility of further application of the new technology in comparison to current one, within automotive industry.
Structural Analysis of an Engine Block Design
Chevtaikin, Sergei ; Dlugoš, Jozef (referee) ; Drápal, Lubomír (advisor)
This master thesis focuses on structural analysis of combustion engine block. The main goal of this work was the design and compare individual solutions of long and short engine’s blocks. First part of work shows existing engine block designs and solutions. Based on the research part, the CAD design of the engine blocks and their discretization was performed by pre-processor programs. Structural analysis and their final comparison were provided by FEM and MBS programs.
Exhaust Gas Recirculation of a Spark-ignition Engine
Dohnal, Martin ; Lempera, Aleš (referee) ; Drápal, Lubomír (advisor)
This master‘s thesis deals with design adjustment of spark ignition combustion engine, which might offer larger share of recirculated exhaust gases in cylinder for reaching a large number of benefits that exhaust gas recirculation can offer. The introductory theoretical part describes exhaust gas recirculation and its influence on spark ignition combustion engine. In the following part the methods of mixture layering and types of intake ports are described. Further design of spiral intake port is made based on calculations. Capability of mixture layering is valuated by numerical simulation. Flow properties of intake ports are compared to production version by an experiment on flow station.
Technology demonstrator of a four-stroke naturally aspirated spark-ignition engine
Chovanec, Stanislav ; Krátký, Martin (referee) ; Drápal, Lubomír (advisor)
Master’s thesis deals with design of single cylinder engine which is technology demonstrator of four cylinder naturally aspirated spark ignition engine Mazda Skyactiv-G. Outset of this thesis deals with construction of modern naturally aspirated engines and with comparison of their parameters. Computational part consists of forces in crank mechanism. These calculations are later used in FEM analysis of connecting rod.
Cylinder Deactivation for Internal-combustion Engines
Radová, Kateřina ; Janoušek, Michal (referee) ; Drápal, Lubomír (advisor)
This bachelor’s thesis focuses on a technology reducing fuel consumption and emissions called cylinder deactivation. The evolution of the technology is described in the first part of the thesis together with explanation of the nature of fuel savings. The description of consequences associated with usage of the technology and possible design approaches for gasoline engines are written in the following part. The thesis also incorporates the results of test performed on diesel engines, where the technology is not currently in production. The last part includes other components used in engines with cylinder deactivation, especially vibration absorbers, together with some examples of application of this technology.
Powertrain Mountings in a Car Body
Dúlovcová, Gabriela ; Vopařil, Jan (referee) ; Drápal, Lubomír (advisor)
The main aim of this thesis is to give reasons and describe different conceptions of engine mountings that eliminate vibrations of powertrain in a car body of personal vehicle. Another part is a comparison of particular conceptions from construction views and features. At the end of the thesis, there is assessment and designed possible future development.
Mixture-Flow in Combustion Chamber
Hrbáček, Jan ; Lempera, Aleš (referee) ; Drápal, Lubomír (advisor)
The Master's thesis deals with the flow of fuel mixture in the combustion chamber and the influence of its geometry on squish generation caused by the compression lift. The thesis introduces design proposals of the geometry of the combustion chamber focusing on the shape of the squish area and their comparison based on the amount of kinetic energy and the velocity profile obtained using 2-D Squish programme calculations.
Crank Train of a V6 Compression-ignition Engine
Homola, Petr ; Píštěk, Václav (referee) ; Drápal, Lubomír (advisor)
This master thesis, concentrated on crank train mechanism of diesel V6 engines with special focus on design and construction of crankshaft, is divided in two main phases. First phase is concept, which contains brief introduction of diesel V-engines construction, parameters of chosen engine unit, especially crank train mechanism, design of crankshaft and 1D analysis of torsional vibrations. Second phase is layout, this phase deals with MBS 3D analysis with flexible FEM models of crankshaft and engine block. These outputs are used for fatigue analysis of crankshaft.

National Repository of Grey Literature : 94 records found   1 - 10nextend  jump to record:
See also: similar author names
1 Drápal, Libor
1 Drápal, Luděk
2 Drápal, Lukáš
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