Course detail
Driving Mechanisms
FSI-QHL Acad. year: 2023/2024 Winter semester
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.
Language of instruction
Czech
Number of ECTS credits
6
Supervisor
Department
Entry knowledge
Matrix calculus, differential and integral calculus, differential equations. Technical mechanics, kinematics, dynamics, elasticity and strength. Fourier analysis.
Rules for evaluation and completion of the course
Requirements for Course-unit credit award:
The orientation within problems discussed and the ability of solving them, examined by working-out assigned tasks without significant mistakes. Continuous study checking is carried out together with given tasks verification.
Examination:
The exam verifies and evaluates the knowledge of physical fundamentals of presented problems, theirs mathematical description on a presented level and application to solved tasks. The exam consists of a written part (test) and if necessary an oral part.
Final evaluation consists of:
1. Evaluation of the work on seminars (elaborated tasks).
2. Result of the writing part of the exam (test).
3. The result of the oral exam if necessary.
Attendance in seminars is obligatory, checked by a teacher. The way compensation of absence is solved individually with a course provider.
Aims
Learning outcomes of the course Driving Mechanisms is to acquaint students with current concepts of propulsion systems with combustion engines as well as with hybrid and electric drives and computational models for determining dynamic force and torque effects in this systems. These computational models are the primary tool for choosing the optimal driveline design and construction of modern passenger and commercial vehicles.
The subject Driving Mechanisms enables students to learn of vehicle driving mechanisms arrangement and computational models for determination the course of internal and external forces and torque, optimal driving mechanism configuration design of in-line, V- and non-conventional arrangement engines together with engine revolution non-uniformity analysis and vibration of powertrains.
The study programmes with the given course
Programme N-ADI-P: Automotive and Material Handling Engineering, Master's, compulsory-optional
Type of course unit
Lecture
26 hours, optionally
Teacher / Lecturer
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
26 hours, compulsory
Teacher / Lecturer
Syllabus
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.