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Optimization of the process of pressing balls into the injector body
Kadlecová, Petra ; Frýza, Josef (referee) ; Brandejs, Jan (advisor)
This thesis is focused on a pressing station as a part of the assembly line in the Bosch Diesel plant in Jihlava. The station provides sealing of a hole in the injector body by ball pressing in. By using several tests the thesis finds out a reason of large amount of waste pieces, checks how can pressing-speed change or lubricant change infuence the pressing process itself and compares capabilities of hydrolic vs. electric pressing machine.
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Common Rail System for 6-cylinder Tractor Engine
Černoch, Josef ; Ramík, Pavel (referee) ; Dundálek, Radim (advisor)
This thesis deals with the installation of modern high pressure injection common rail system to six-cylinder tractor engine. This system replaces injection system with in-line fuel injection pump. Common Rail system installation on an existing engine is designed with minimal design changes to the engine block and engine head. It is advantageous to minimize production costs of the transition to high-pressure injection system. The thesis contains the design and stress analysis of the new component for high-pressure injection system.
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Injection systems of rocket engines
Vrbica, Kryštof ; Cejpek, Ondřej (referee) ; Malý, Milan (advisor)
This bachelor thesis deals with liquid propelled rocket engine injector design. The theoretical part describes the categorisation and principles of the function of a rocket injector element. The following research part provides an in-depth examination of the most often used injectors including their possible versions. This section concerns coaxial, pintle and impinging injectors. The emphasis is laid on discharge coefficient, spray behaviour and definition of the optimal injector geometry for high-quality atomization. The thesis is concluded with a design of test injectors and their experimental comparison. Coaxial and two version of impinging injector are tested with regards to spray behaviour, their discharge coefficients, Sauter mean diameter and droplet velocity. Design drafts required for production are included in this thesis.
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Design and optimization of injector bracket
Moravec, Tomáš ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
The present Master thesis entitled "Engineering Design and Optimization of Injector Holder" deals with the design of clamping holder, whose function is to ensure the exact position of injector system Common Rail. The shape of the injector holder is designed in the modelling program, both with respect to the installation space of internal combustion engine and also the method of manufacture. The proposed geometry is then subjected to stress analysis in the program using FEM. The final design phase is to optimize the geometry of the injector holder using the same method with the aim to reduce the weight of the component.
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Equipment for analysis of fuel jet from fuel nozzle
Krahulík, Michal ; Beran, Martin (referee) ; Svída, David (advisor)
Aim of this diploma thesis is a design and realization of the test rig for measuring characteristics of fuel jet from injector nozzle for vehicle internal combustion engines. The test rig was designed to test injectors for direct injection of petrol engines, especially for 1,5 TSI engine, which can be found in Volkswagen Group cars. The construction allows testing a big variety of injectors with only small adjustments of the test rig. Design was created in software Solidworks 2020. The thesis also deals with production process of individual components and with description of the used components for measuring and controling the test rig.
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Injection System with Pressure Accumulator for Commercial Powertrain Units
Suchánek, David ; Prokop, Aleš (referee) ; Dundálek, Radim (advisor)
The present work deals with a common-rail fuel injection system for powertrain applications. As part of the solution of the thesis, a comprehensive analysis of the injection system has been carried out with an indication of the principle and function of the necessary components, including demonstrations on specific vehicles and an outline of future developments. The injection system can be divided into 3 parts: low pressure, high pressure and control. The low-pressure section describes the fuel filter and feed pump. Within the high-pressure part, the components which are the injector, the high-pressure pump and the fuel rail are given in context. The control section then presents the control unit, sensors and actuators necessary to control the pressure and quantity of fuel. In order to give a comprehensive overview of the common-rail fuel injection system, the common-rail system parameters were measured and evaluated on a specific power unit using diagnostic equipment. The measurements verified the maximum pressure declared by the vehicle manufacturer, while showing the fuel pressure waveform in the fuel rail in different engine operating modes. style.
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Injection systems of rocket engines
Vrbica, Kryštof ; Cejpek, Ondřej (referee) ; Malý, Milan (advisor)
This bachelor thesis deals with liquid propelled rocket engine injector design. The theoretical part describes the categorisation and principles of the function of a rocket injector element. The following research part provides an in-depth examination of the most often used injectors including their possible versions. This section concerns coaxial, pintle and impinging injectors. The emphasis is laid on discharge coefficient, spray behaviour and definition of the optimal injector geometry for high-quality atomization. The thesis is concluded with a design of test injectors and their experimental comparison. Coaxial and two version of impinging injector are tested with regards to spray behaviour, their discharge coefficients, Sauter mean diameter and droplet velocity. Design drafts required for production are included in this thesis.
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The High Pressure Fuel System Application for CI-engine
Ševčík, Ondřej ; Prokop, Aleš (referee) ; Dundálek, Radim (advisor)
This thesis focuses on the design of new high pressure injection system application on diesel engine. The design came from company Zetor’s demands. For this application was chosen system Common Rail supplied by company Bosch. Assignment was separated into several tasks. Research of suitable components for low pressure section, design of waste system and high pressure injection tubes design including injector clamping. Due to injectors used in this system was necessary to redesign cover for valves and even new system to lead wires from outside of the engine to injectors. Injector is attached by screw connection, which is composed from screw and clamping jaw. These parts are subjected to an analytic calculations. Clamping jaw of injector is even subjected to a FEM analysis, which focuses on fatigue life. Finally, the drawings were documented.
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