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Parameters for 1D Single Cylinder Engine Simulation
Stryja, Štěpán ; Šebela, Kamil (referee) ; Janoušek, Michal (advisor)
The relationship between the 1D simulation and the corresponding input parameters is addressed in the paper. The one-dimensional simulation is demonstrated in the GT-Power environment. The work deals with both experimental and computational analysis of the input parameters. Additive methods of 3D printing of fixtures and subsequent measurement of volumetric flow rates on a Superflow Flowbench SF-260E purge station were used. This procedure led to the final calculation of discharge coefficients. The 3D scanning method, using ATOS 2M equipment, together with subsequent data processing, using the appropriate software, led to the analysis of the valvetrain mechanism and the construction of its kinematics. The practical part was demonstrated on two-cylinder heads of a four-stroke single cylinder engine with a displacement of 125 cm3, with natural aspiration. One of the heads was modified, resulting in volumetric flow increase of 29 % in case of the intake and 15 % in case of the exhaust, compared to the stock head. The work led to the acquisition of key input data for the 1D simulation of the aforementioned engine.
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Optimalizace časování ventilového rozvodu u přeplňovaného motoru
Mahr, Ivoš
This diploma thesis deals with optimization of timing valve train on turbocharged internal combustion engine. Experimental data was collected on engine dyno which belongs to the Institute of Engineering and Automobile Transport of Mendel University in Brno. Engine parameters were improved by changes in the timing of the intake and exhaust valves. Relation between the timing of the valves and characteristics of turbocharged engine with a turbocharger was researched. The results of this study make it possible to set the timing valve train according to the load of the internal combustion engine and thus reduce its consumption and increase performance.
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General Solution of Valvetrain Mechanical Losses
Mynařík, Aleš ; Maršálek, Ondřej (referee) ; Novotný, Pavel (advisor)
This master's thesis deals with the determination of mechanical losses in the valvetrain of the combustion engine. It describes the computational and experimental methods of determining the mechanical losses of valve mechanism. The practical part of the thesis focuses on the programing of structures in Matlab. This application calculates the values of mechanical losses of valvetrain and displays their graphical representation. This program is used for computing the mechanical losses of the selected real engine.
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Computational modeling of valvetrain mechanical losses
Mačuga, Martin ; Píštěk, Václav (referee) ; Novotný, Pavel (advisor)
The thesis disserts upon computational modelling of valve train mechanical losses, finding the appropriate method of solving and its application on valve gear in Diesel in-line four-cylinder engine. The thesis further disserts upon proposition of appropriate adjustments leading to the reduction of mechanical losses. The calculation was performed in MBS software ADAMS.
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Design of Gear Timing Mechanism for SI Engine
Štábl, Tomáš ; Beran, Martin (referee) ; Svída, David (advisor)
Tomáš ŠTÁBL Design of Gear Timing Mechanism for SI Engine MT, IAE, 2009, 62 pp., 27 fig. This master thesis is concerning the valve train proposal of the spark ignition engine for sports purposes. Antecedent to the actual proposal is the division and retrieval of the modern valve trains, the valve train acting forces description, division and description of the individual valve-lift curve parts , valve springs and the dynamic models of the valve train. In the thesis there are designed the valve lift curves with the continuous course of acceleration, valve springs and valve springs natural oscillations damper for engine Honda CBR 929RR. The dynamic analysis of valve train approach is performed.
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Calculation of OHV-Valve Gear Dynamic Stress
Opluštil, Tomáš ; Kobský, David (referee) ; Rauscher, Jaroslav (advisor)
This diploma thesis deals with investigation of dynamic straining valve OHV for four-valve head diesel engine Zetor 1505 – 90 kW. The calculation is performed analytically in mathematic software MathCad and MBS software ADAMS/Engine 2005. Also in this diploma thesis is from results obtained from MBS system perfomed stressed analysis valve_rocker arm gear divorce method final elements (MKP) in program ANSYS 10.
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Valvetrain of Compression-ignition Tractor Engine
Mikula, Vojtěch ; Janoušek, Michal (referee) ; Drápal, Lubomír (advisor)
This bachelor thesis deals with the main types and parts of the valvetrain systems of four-stroke engines. In the first part of the thesis are presented the most widely used versions of valvetrains and their use in the tractor engines. In the next part of the thesis is performed the construction and stress calculation of the valvetrain according to proposed proportions.
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Valvetrain of Compression-ignition Tractor Engine
Mikula, Vojtěch ; Janoušek, Michal (referee) ; Drápal, Lubomír (advisor)
This bachelor thesis deals with the main types and parts of the valvetrain systems of four-stroke engines. In the first part of the thesis are presented the most widely used versions of valvetrains and their use in the tractor engines. In the next part of the thesis is performed the construction and stress calculation of the valvetrain according to proposed proportions.
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