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Four-cylinder petrol engine with eccentric crank mechanism for passenger vehicles
Mlčoch, Pavel ; Kaplan, Zdeněk (referee) ; Píštěk, Václav (advisor)
This Diploma Thesis is aimed at exploring the potential of offset crankshaft mechanism for four cylinder inline petrol engine in terms of reducing the frictional losses of the piston group. Thesis deals with the influence of eccentricity on kinematics, dynamics and balance of the crank train. Furthermore, specific crankshaft balancing is elaborated and applied on 3D CAD model of the crankshaft. Calculation of fatigue safety factor using the advanced LSA method that takes into consideration the effect of forced torsional vibration and utilizes outputs from the FEA software (ANSYS APDL) is performed as well. Thesis also includes design of two options of rubber torsion damper mounted on the engine belt pulley and the follow-up choosing of the more advisable one.
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Ground effect in motorsport
Mlčoch, Pavel ; Hejtmánek, Petr (referee) ; Čavoj, Ondřej (advisor)
This bachelor thesis describes ground effect, its influence on car aerodynamics and its use in motorsport. The thesis describes the dependence of downforce created by ground effect on the design and set-up of the race car, as well as on the downforce generating parts' relative movement in relation to the track during a race. Advantages and disadvantages of the use of ground effect aerodynamics are discussed as well. Next, there is brief summary of the use of ground effect throughout the history of motorsport. At the end, attention is paid to modern race and sport cars using the ground effect aerodynamics.
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Four-cylinder petrol engine with eccentric crank mechanism for passenger vehicles
Mlčoch, Pavel ; Kaplan, Zdeněk (referee) ; Píštěk, Václav (advisor)
This Diploma Thesis is aimed at exploring the potential of offset crankshaft mechanism for four cylinder inline petrol engine in terms of reducing the frictional losses of the piston group. Thesis deals with the influence of eccentricity on kinematics, dynamics and balance of the crank train. Furthermore, specific crankshaft balancing is elaborated and applied on 3D CAD model of the crankshaft. Calculation of fatigue safety factor using the advanced LSA method that takes into consideration the effect of forced torsional vibration and utilizes outputs from the FEA software (ANSYS APDL) is performed as well. Thesis also includes design of two options of rubber torsion damper mounted on the engine belt pulley and the follow-up choosing of the more advisable one.
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|
|
Ground effect in motorsport
Mlčoch, Pavel ; Hejtmánek, Petr (referee) ; Čavoj, Ondřej (advisor)
This bachelor thesis describes ground effect, its influence on car aerodynamics and its use in motorsport. The thesis describes the dependence of downforce created by ground effect on the design and set-up of the race car, as well as on the downforce generating parts' relative movement in relation to the track during a race. Advantages and disadvantages of the use of ground effect aerodynamics are discussed as well. Next, there is brief summary of the use of ground effect throughout the history of motorsport. At the end, attention is paid to modern race and sport cars using the ground effect aerodynamics.
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