National Repository of Grey Literature 190 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Construction design of the biological specimen vehicle
Otáhalík, Pavel ; Ramík, Pavel (referee) ; Štětina, Josef (advisor)
This diploma thesis deals with the design of a vehicle for biological sampling. The beginning of the thesis is devoted to explaining the reasons for the construction of this vehicle and examples of other special vehicles used by paramedics or rescuers are given. The next part of the thesis deals with the design. First, the vehicle that will serve as the platform for the body is selected and then the design of the body is described. Next, the interior of the sampling vehicle is designed to contain all the equipment needed for the efficient work of the doctors performing tissue sampling. Finally, the strength of the auxiliary frame of the vehicle, which serves as the basis for the superstructure, is checked. In conclusion, the design is evaluated to see if all the requirements given in the brief have been achieved and consider what needs to be addressed further to build the biological sampling vehicle.
Trabant engine modernization
Kočka, Martin ; Ramík, Pavel (referee) ; Kaplan, Zdeněk (advisor)
The aim of this thesis is to make a list of available knowledge of the P63 engine, found in the Trabant 601 cars. Overview of its advantages and disadvantages, proposal of possible design changes, which would lead to elimination of the disadvantages, while increasing the power output of the engine. Assembly of the engine using the proposed modifications.
Design of a "Cyclist/Pedestrian Dummy" platform for testing advanced assistance systems
Bartuněk, Jiří ; Ramík, Pavel (referee) ; Štětina, Josef (advisor)
The aim of this master's thesis is to design a remote-controlled platform for testing advanced assistance systems in modern cars. The work focuses on the detailed construction of a robust undercarriage powered by electric motors. This undercarriage must be capable of carrying various dummies, such as a pedestrian, child, or cyclist, and withstand being overrun by a vehicle, which is verified using the finite element method. The thesis also includes the development of a specialized attachment system for dummies that minimizes potential damage to the tested vehicle. The result is a complete design of the platform, including a detailed description of the selection and integration of electronic components, providing a comprehensive basis for the manufacture of a testing prototype. The thesis is supplemented with drawing documentation.
Design of a prototype device for assembling cooler inserts
Hanák, Jiří ; Ramík, Pavel (referee) ; Bazala, Jiří (advisor)
Tato diplomová práce se zaměřuje na návrh nového a vylepšeného skládacího zařízení určeného pro skládání vložek chladičů v prototypové výrobě s důrazem na zvýšení efektivity procesu skládání a snížení výrobního času. V rešeršní části této diplomové práci jsou popsány rozdílné typy chladicích systémů včetně jednotlivých komponentů obsažených v chladících systémech s hlavním zaměřením na konstrukci chladiče. Dále jsou popsány rozdílné typy skládacích zařízení používané v procesu skládání vložek chladičů a je charakterizován původní návrh skládacího zařízení včetně jeho aktuálních problémů. Na základě rešeršní části této práce je definováno zadání nového skládacího zařízení a představeny dvě koncepční řešení s několika variantami řešení kritických konstrukčních uzlů. Ze dvou koncepčních řešení bylo vybráno jedno finální a jeho kritické konstrukční uzly byly prověřeny nutnými výpočty nebo případnou analýzou. Následně byly vyhotovena výkresová dokumentace nového skládacího zařízení. Nakonec je představen nový vylepšený návrh skládacího zařízení, který je poté zhodnocen.
Mobile platform for testing autonomous vehicle sensors
Valla, Tomáš ; Ramík, Pavel (referee) ; Štětina, Josef (advisor)
The aim of this diploma thesis is to create a design of a mobile platform. The platform contains all the necessary electronics from conventional RC models and thus the RC control itself is guaranteed. It is also equipped with a light but solid platform, which is suitable for attaching the necessary sensors, lidars, cameras and other necessary accessories. Part of the work is also a brief overview of the division of RC models and evaluation of the components used for possible construction of the model. The final chapter is devoted to FEM analysis, where the load-bearing capacity of the platform under different load models is checked by means of structural analysis. Using modal analysis, the platform's own critical frequencies were determined and compared to the frequencies that are transmitted when driving on the road.
Modification of a motorcycle spark ignition engine
Poulíček, Matěj ; Ramík, Pavel (referee) ; Kaplan, Zdeněk (advisor)
This diploma thesis is about possible modifications of four-stroke motorcycle petrol engines for increasing power. It also deals with the modification of the Aprilia Leonardo 250 engine from a 2-valve variant to a 4-valve variant, the simulation of this engine and the proposed solution in the GT SUITE. Attention is also paid to the strength control of the crank mechanism of the engine.
Design of Device for O-rings Fitting on Overflow Valve of Injection Pump
Matula, David ; Beran, Martin (referee) ; Ramík, Pavel (advisor)
The thesis deals with the problem of threading o-rings on the overflow valve of the CP4 injection pump. The thesis was prepared for the company Bosch Diesel s.r.o. in Jihlava. In the thesis, first of all, an introduction of the company and their products is given. In the next part of the thesis, an analysis of the current state of the workplace is made. This is followed by market research in the field of automated o-ring threading. This research served as inspiration for the design of the threading head. The constructed head was manufactured and tested at the test site. After testing the head, several variations of the o-ring threading station were developed. A multi-criteria method was used to select the most suitable variant. A design concept of the workstation was developed for the winning variant. The resulting concept was evaluated from an economic and technical point of view.
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.
Flow characteristics measurement of intake and exhaust ports on SF 260 flowbench
Školař, Karel ; Ramík, Pavel (referee) ; Beran, Martin (advisor)
This Bachelor’s thesis deals with experimental modifications in order to increase the filling efficiency of the combustion engine. The thesis contains a search for issues dealing with increasing the filling efficiency of the engine. To verify the modifications on the cylinder head, measurements were performed in the laboratory at the flow bench. At the end, the measured results were compared and evaluated.

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