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Application of Pressure Accumulator Injection System on Six-cylinder CI Engine
Pacovský, Tomáš ; Štěpánek, Karel (referee) ; Dundálek, Radim (advisor)
This master's thesis deals with application of modern injection system Common Rail on six-cylinder CI engine. One of aims of thesis is to get a large overview of pressure accumulator injection system and explore the development in this area. Among main aims of the thesis belong a new construction layout in Pro/Engineer, accomplishing of static and dynamic analyse of most important parts via the finite element method (FME) and necessary control calculations. Finally, the design documentation of new most essential designed parts will be made. During making the thesis necessary source materials obtained from Vývojový ústav traktorů a.s. of Zetor Group company was made use of.
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CI-engine Variable Intake System
Cihlář, Lukáš ; Štěpánek, Karel (referee) ; Dundálek, Radim (advisor)
The master´s thesis focuses on design of intake manifold with swirl flap for diesel engine. In addition to the design of sub-components of the intake manifold are also investigated the influence of new solutions on engine parameters. The influence of the new solution is compared to the original version and a reference model simulating intake manifold used by competitors. After simulation of thermodynamics and fluid flow are evaluated each variants.
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Application of Pressure Accumulator Injection System on CI Engine
Šiška, Adam ; Štěpánek, Karel (referee) ; Dundálek, Radim (advisor)
This master’s thesis deals with building the most modern injection systém Common-Rail for four-cylinder tractor diesel engine. The following application is a conversion from a obsolete system with inline injection pumps. Because the costs for this conversion must be minimized, that it is effort of minimal intervention in engine design. First this master’s thesis focuses on the theory of injection systems of diesel engines and related things and then the thesis shows the design conversion supported analytical calculations and FEM analysis of newly designed components.
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The Concept of In-line Injection Pump for 120 MPa Pressures
Tichý, Ondřej ; Štěpánek, Karel (referee) ; Dundálek, Radim (advisor)
This thesis provides an overall evaluation of the concept of inline injection pump for pressure 120 MPa. The name of this pump is "Mj" and it is a product of the Motorpal, a.s. company. This thesis also contains an analysis of the contact pressures between the cam lobe and the pumping element's roller tappet. This includes comparing three different shapes of the roller and their influence on the magnitude of contact pressures. Calculations of the plunger helix and of the fuel delivery's impact on the relative position of plunger are also present.
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Proposal of Engine Intake System with Exhaust Gases Recirculation
Vojkůvka, František ; Štěpánek, Karel (referee) ; Dundálek, Radim (advisor)
The object of the diploma thesis is to optimize vacuum function of the ejector using computional fluid dynamics, or CFD. The ejector is inserted to the intake system of the six - cylinder diesel engine to increase the pressure gradient of the exhaust gas recirculation system. The analysis of the current design solution is performed and then the ejector with the new shape affording higher vacuum effect is proposed. The introductory part is devoted to the questions of diesel engines emissions and technology to reduce emissions in the exhaust system focused on the EGR.
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Zhroucený stát Somálsko - Analýza vývoje Somálska po pádu režimu Siyaada Barre
Štěpánek, Karel
This Bachelor thesis analyzes the development of one of the poorest countries in the world. The study primarily examines the political failure of the individual, general Barre, as the main cause of the collapse of the state but mainly this thesis analyzes and compares central Somalia with Puntland and Somaliland. The aim of the work is to analyze the 3 main regions in the country using MPI, Well-being index etc. This work also defines the concept of failed states, theoretical approaches to this concept, describes the historical roots of the current conflict, and also tries to suggest possible solutions to the current situation.
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The Concept of In-line Injection Pump for 120 MPa Pressures
Tichý, Ondřej ; Štěpánek, Karel (referee) ; Dundálek, Radim (advisor)
This thesis provides an overall evaluation of the concept of inline injection pump for pressure 120 MPa. The name of this pump is "Mj" and it is a product of the Motorpal, a.s. company. This thesis also contains an analysis of the contact pressures between the cam lobe and the pumping element's roller tappet. This includes comparing three different shapes of the roller and their influence on the magnitude of contact pressures. Calculations of the plunger helix and of the fuel delivery's impact on the relative position of plunger are also present.
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CI-engine Variable Intake System
Cihlář, Lukáš ; Štěpánek, Karel (referee) ; Dundálek, Radim (advisor)
The master´s thesis focuses on design of intake manifold with swirl flap for diesel engine. In addition to the design of sub-components of the intake manifold are also investigated the influence of new solutions on engine parameters. The influence of the new solution is compared to the original version and a reference model simulating intake manifold used by competitors. After simulation of thermodynamics and fluid flow are evaluated each variants.
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Zhroucený stát Somálsko - Analýza vývoje Somálska po pádu režimu Siyaada Barre
Štěpánek, Karel
This Bachelor thesis analyzes the development of one of the poorest countries in the world. The study primarily examines the political failure of the individual, general Barre, as the main cause of the collapse of the state but mainly this thesis analyzes and compares central Somalia with Puntland and Somaliland. The aim of the work is to analyze the 3 main regions in the country using MPI, Well-being index etc. This work also defines the concept of failed states, theoretical approaches to this concept, describes the historical roots of the current conflict, and also tries to suggest possible solutions to the current situation.
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Application of Pressure Accumulator Injection System on Six-cylinder CI Engine
Pacovský, Tomáš ; Štěpánek, Karel (referee) ; Dundálek, Radim (advisor)
This master's thesis deals with application of modern injection system Common Rail on six-cylinder CI engine. One of aims of thesis is to get a large overview of pressure accumulator injection system and explore the development in this area. Among main aims of the thesis belong a new construction layout in Pro/Engineer, accomplishing of static and dynamic analyse of most important parts via the finite element method (FME) and necessary control calculations. Finally, the design documentation of new most essential designed parts will be made. During making the thesis necessary source materials obtained from Vývojový ústav traktorů a.s. of Zetor Group company was made use of.
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