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Electric Car Rear Axle Mechanic Driveline Design
Baroš, Eduard ; Černý, Jiří (referee) ; Ramík, Pavel (advisor)
The aim of the diploma thesis is the design of mechanical parts of the rear axle driveline suitable for rebuilding of a given sports car into an electric car. The introductory part briefly explains the physical principles of the drive and contains a brief summary of the current concepts of electric vehicle propulsion. Afterwards, there is a comparison and selection of a suitable concept for a given electric vehicle, determination of the basic vehicle parameters based on the calculation of the longitudinal vehicle dynamics and the gearbox calculation on the basis of which the design is solved. The next part is dedicated to the computational inspection of parts using the finite element method. The final part deals with the placement of the assembly inside the vehicle and the evaluation of the drive mechanism.
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Measuring the power of IC-engines
Adamec, Vojtěch ; Ramík, Pavel (referee) ; Štětina, Josef (advisor)
This bachelor thesis deals with topic measuring the power and the torque of internal combustion engines on chassis dynamometer. The aim of the thesis was to show advantages and disadvantages of different types of dynamometers, to make review of standards for measuring power on chassis dynamometer, effect of atmospheric conditions, resistances and slippage. Thesis also describes evolution, different designs of chassis dynamometers, effect of roller diameter to rolling resistance and deformation of tire, suitable types of dynamometers for chassis dynamometer, equipment of testing room, modes of operating and differences between static and dynamic power testing. In the end I have made prediction of incoming development devices of this type with regard to evolution of intelligent chassis control systems and electric vehicles.
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Design of single-cylinder diesel engine
Němec, Jan ; Ramík, Pavel (referee) ; Píštěk, Václav (advisor)
This thesis deals with the construction of the whole combustion engine, the crankshaft design, the piston and the piston rod. It also outlines the central lubrication, the cooling, the injection pump, the movable pump and the gear pump as well as fuel filtering, injection, engine timimg, etc. The four-cycle engine has four working cycles. During the first cycle the "clean" air is drawn and the piston moves from the bottom centre to the top centre and it comes to compression in the cylinder thanks to the adjusting of the advance and the fuel is injected into the cylinder. As the piston moves rapidly to the top centre, the pressure and the temperature increase so much that the fuel ignites. The pressure is about 26 atm (2.634Mpa) and the temperature is about 600°C. The fuel burns ideally in spherical wave fronts. The fuel is injected under high pressure as aerosol generates. As the fuel expands, the volume increases and the piston moves to the bottom centre. And it is its only working cycle.The piston moves from the bottom centre to the top centre and the exhaust valve opens through which the hot gases of combustion leave - and everything repeats. The design of the particular components is shown in the animations. Modelling and simulations were produced using CAD system. Everything is supported with calculations.
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Components Testing in Automotive Industry
Tovaryš, Miroslav ; Svída, David (referee) ; Ramík, Pavel (advisor)
Tato bakalářská práce se zaměřuje na testování komponent v automobilovém průmyslu. Nabízí přehled testovacích metod, jejich základní popis a popis testovacích zařízení. V práci jsou také zmíněny CAD systémy, metoda konečných prvků a zrychlené testy, které slouží ke snižování finančních nákladů na testování pomocí omezování počtu testů nebo zkracování testovacích časů. Principy těchto nástrojů jsou zde stručně popsány. Závěr práce shrnuje důvody, které ženou vývoj testovacích metod kupředu.
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Formula Car Pedal Assembly
Pilčík, Adam ; Beran, Martin (referee) ; Ramík, Pavel (advisor)
This thesis draws up a basic overview of the current groups pedal cars. It focuses on creating a computer model of the pedal group with the help of the mathematical model and simulation stress of individual components and proposed relief.
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Design of vehicle suspension stabilizer
Macháček, Tomáš ; Ramík, Pavel (referee) ; Porteš, Petr (advisor)
Tato diplomová práce je zaměřená na stabilizátory u podvozku aut. První část popisuje všeobecné znalosti vlivu naklonění karosérie na jizdní vlastnosti auta a možnosti konstrukčních řešení používaných v praxi. Dále jsou v této části uvedeny nevýhody použití stabilizátoru a jejich náhrady. Nasledující téma se zaměřuje na soutěž Formule Student a její všeobecná pravidla. Hlavní částí této práce je analýza stabilizátoru Formule Ford, na kterou v poslední části této práce navazuje analýza předního a zadního stabilizátoru Formule Student. Byly vytvořené kompletní MBS modely pro přední a zadní zavěšení včetně stabilizátoru. Díky těmto modelům bylo možné provést výpočty klopných tuhostí a pevnostní výpočty. Z těchto výpočtů bylo možné určit vhodné nastavení stabilizátoru. Všechny modely mohou být dále použitelné pro analýzu jízdních vlastností příslušného vozidla.
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Optimalization of Exhaust Manifold for Škoda 1,2 MPI
Kubiš, Milan ; Ramík, Pavel (referee) ; Beran, Martin (advisor)
The subject of this diploma thesis is optimalization of exhaust manifold of ŠKODA 1,2 MPI engine with respect for the plastic deformation at heat stress. The first part is focused on general description of converter module, whose component the exhaust manifold is. In the next part of the thesis is computation of a heat load of the exhaust manifold. The last part is devoted to the seal analysis of the whole converter module of a ŠKODA three-cylinder engine.
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Spark ignition engine with variable compression ratio
Fűri, Peter ; Ramík, Pavel (referee) ; Kaplan, Zdeněk (advisor)
With the aim of reducing pollutant emissions from internal combustion engines, the application of stoichiometrically operated spark ignition engines, for light vehicles, has been overcoming the compression ignition engines market share throughout the past years. The ability of a substantial reduction of the primary harmful emissions (HC, CO, and NOx). Nonetheless, with increasing attention to CO2 emissions, the development of highly efficient downsized spark ignition engines turns to be of enormous interest. However, to enable high load operation on such downsized engines, the compression ratio must be reduced due to knock limitations, reducing the partial-load operations efficiency. The work tries to describe solutions that have already been developed by various car manufacturers and to describe in detail my proposed design solution for changing the compression ratio using two-stage system.
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SI Engine Performance Tuning
Beran, Martin ; Ramík, Pavel (referee) ; Svída, David (advisor)
The main scope of this thesis is the four stoke petrol engine performance tuning by ECU. The thesis analyses processes during engine management, describes and explains singular signals processed and generated by ECU. Designs measuring strings and optimal procedures for measuring on whose basis has been assembled optimal methodology leading to the optimalization of single operating mode of engine.
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