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Course detail
FSI-QHLAcad. year: 2023/2024
Objective of the Drive Mechanisms course is to acquaint students with basic concepts and layout of propulsion systems of passenger and utility vehicles with conventional as well as hybrid and electric drives. Mechanisms of combustion engines. Kinematics and dynamics of the drive mechanisms. Internal and external forces of combustion engines. Engine torque, harmonic analysis. Forces affecting the bearings of a piston machine. Balancing of inertia forces and of line engine torque, use of balancing shafts. Dynamics of V-engines and engines with unconventional power train arrangement. Irregularity of combustion engine running, design of flywheel. Cam mechanisms. Hybrid and electric drive of vehicles.
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Elearning
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Syllabus
1. Mechanisms of power units and their computational models. Kinematics of centric crank mechanism. Kinematics of eccentric crank mechanism, mechanisms with connecting rod. 2. Dynamics of crank mechanism, computational models, internal and external forces. 3. Torque of piston machines, harmonic components, uneven running, flywheel. 4. Balancing of inertial forces and moments in the crank mechanism, balancing units. 5. Dynamics of crank mechanism of engines with a small number of cylinders. 6. Dynamics of the crank mechanism of in-line piston machines. 7. Dynamics of crank mechanism of fork engines, unconventional mechanisms. 8. Oscillations of drives with reciprocating machines, natural frequencies, forced oscillations. 9. Dynamics of automobile drives with gears, two-mass flywheel. Tuning of dynamic drive systems. 10. Dynamic vibration dampers in automotive technology. Pendulum vibration eliminators. 11. Cam mechanisms, kinematics and dynamics of cam mechanisms. 12. Flexible bearing of drive units, center of elasticity, main axes of elasticity. 13. Drivetrain of vehicles with hybrid and electric drives, active vibration damping.
Computer-assisted exercise
01. Effective engineering computational tools, computational technology.02. Computational tools in the branch, computational Matlab software.03. Matlab utilization, data file handling, data visualization.04. Centric crank mechanism, course of kinematic quantities.05. Kinematic quantities of eccentric crank mechanism.06. Primary and secondary forces in crank mechanism, engine torque.07. Engine p-alfa diagram, forces on components of cranktrain.08. Numerical Fourier analysis of engine torque, harmonic orders.09. Balancing of single-cylinder engine and multi-cylinder in-line engines.10. Balancing of V-engines.11. Cams and their classification.12. Course of kinematic quantities of engine cam mechanisms.13. Vibration of powertrains, computational models and possibilities of vibration damping.